VTI and NAT IPsec Tunnel mode

Similar Questions

• (Between Cisco and Fortigate) IPsec tunnel question

  Hi all

  Im trying to install an IPsec site-to-site between 2 different routers (Cisco 3750 and Fortigate 100a) (R1 & Fortigate100A)

  IPsec, the whole scenario works with the installation.

  But unfortunately the tunnel (between R1 & Fortigate100A) IPsec does not work.

  (Pls look at the attached jpg file)

  The message is received in routers are shown below:

  Cisco: R1:

  % CRYPTO-6-IKMP_MODE_FAILURE: fast mode processing failed with the peer to 192.168.43.75

  FortiGate 100A:

  IKE 0: none established HIS IKE for informational type of d18e1af773e658b9/192.168.43.195:500->192.168.43.75 Exchange 3 cookie d3695c6cea17475a, don't drop

  IKE 0:Cisco - P1:6899: authentication OK

  IKE 0: none established HIS IKE for informational type of d18e1af78ed17bf9/192.168.43.195:500->192.168.43.75 Exchange 3 cookie 414bd35ab92bc4ef, don't drop

  IKE 0:Cisco - P1:6899:Cisco - P2:14802: failure of negotiating quick mode due to the delay of new attempt IKE 0:Cisco - P1:6900: authentication OK

  I configured both routers as follows:

  Cisco:

  HostName:R1

  ISAKMP policy 1

  Hash: sha

  Authentication: pre-shared

  Encryption: AES128

  DH group: 2

  Life 86400

  ISAKMP Key: cisco1 address 192.168.43.75

  Crypto IPsec transform-set esp - aes and hmac-sha-esp RIGHT

  Access-list: 101 permit ip 10.0.0.0 0.0.0.255 10.10.10.0 0.0.0.255

  Map R1_to_Fortigate100A 10 IPsec-Isakmp crypto

  defined by peers: 192.168.43.75

  Mailing address 101

  The value transformset: RIGHT

  int fa # 0 / 0 Crypto map R1_to_Fortigate100A

  FortiGate:

  HostName: Fortigate100A

  Phase 1:

  Preshared key: cisco1

  The remote gateway ip address: 192.168.43.195

  mode: aggressive

  Accept any pair

  Proposal P1:

  AES 128 / SHA1

  AES 192 / SHA1

  AES192/SHA 256

  DH: 2

  Keylife: 86400

  Phase2:

  AES 128 / SHA1

  AES 192 / SHA1

  AES192/SHA 256

  Keylife:86400

  Quick mode selector:

  Source address: 10.10.10.0/24

  Destination address: 192.168.43.0/24

  I will be very very very grateful if you informed of my faults possible a solution

  Happy new year

  Ministry of education

  For some time I messed with a fortigate, but I would try first to change the remote address of the phase 2 to 10.0.0,0/24. If this is the statement "interesting traffic", it does not match what you have on the Cisco. After that, try to change the phase 1 Ike mode to something else than "aggressive."

  Sent by Cisco Support technique iPad App

• Protection of IPSEC Tunnel and tunnel QOS shaping does no formatting.

  I have an implosion of the little brain as to why it won't work.

  I tried the QOS policy on tunnel interfaces and the ATM interface. No formatting occurs. Interfaces to transmit at their leisure.

  Please can someone have a better day me to tell me what I am doing wrong?

  Here is the config relevant (and standard). without the political order applied anywhere. Any help appreciated.

  ---------------------------------------------------------------------------------

  class-map correspondence-everything APPSERVEURS
  match the name of group-access TERMINALSERVERS
  class-map correspondence-any VOICE
  sip protocol game
  match Protocol rtp
  match dscp ef
  !
  !
  Policy-map QOSPOLICY
  class VOICE
  priority 100
  class APPSERVEURS
  33% of bandwidth
  class class by default
  Fair/salon-tail 16
  Policy-map of TUNNEL
  class class by default
  form average 350000
  QOSPOLICY service-policy
  !
  !
  interface Tunnel0
  bandwidth 350
  IP 172.20.58.2 255.255.255.0
  IP mtu 1420
  load-interval 30
  QoS before filing
  source of Dialer0 tunnel
  destination tunnel X.X.X.X
  ipv4 ipsec tunnel mode
  tunnel path-mtu-discovery
  Tunnel IPSECPROFILE ipsec protection profile
  !
  Tunnel1 interface
  bandwidth 350
  IP 172.21.58.2 255.255.255.0
  IP mtu 1420
  load-interval 30
  delay 58000
  QoS before filing
  source of Dialer0 tunnel
  destination tunnel Y.Y.Y.Y
  ipv4 ipsec tunnel mode
  tunnel path-mtu-discovery
  Tunnel IPSECPROFILE ipsec protection profile
  !
  !
  ATM0/0/0 interface
  no ip address
  load-interval 30
  No atm ilmi-keepalive
  !
  point-to-point interface ATM0/0/0.1
  PVC 0/38
  aal5mux encapsulation ppp Dialer
  Dialer pool-member 1
  !
  !
  interface Dialer0
  bandwidth 400
  the negotiated IP address

  ---------------------------------------------------------------------------------------------------------

  Thank you

  Paul

  Paul,

  One of the reasons could be because of the VTI overload.

  That being said I don't know which is the way to go with your QoS:

  https://Tools.Cisco.com/bugsearch/bug/CSCsz63683/?reffering_site=dumpcr

  My suggestion: give it a try with 15.2 M/T and prosecute TAC with discount people rather than VPN QoS ;-)

  M.

• Cisco VTI and configuration of IPSec (IKE Phase2) ITS proposal.

  Hello

  I have a question about the functionality of the virtual Tunnel Interface (VTI) configuration option. I have a Cisco IOS router, ending individual customers with the tunnel interfaces. The question I have now is that how can I specify the traffic 'interesting' on the security association proposal ITS IPsec (IKE Phase2). The configuration of the router is made by cryptographic profiles like this:

  !

  crypto ISAKMP policy 10

  BA 3des

  preshared authentication

  Group 2

  !

  Crypto isakmp ISAKMP_PHASE1_PARAMETERS profile

  key ring PRESHARED_KEYS

  function identity address 1.2.3.4 255.255.255.255

  !

  door-key crypto PRESHARED_KEYS

  pre-shared key address 1.2.3.4 key xyz

  !

  Crypto ipsec transform-set esp-3des esp-sha-hmac VPN-TRANSFORMSET

  !

  Profile of crypto ipsec ISAKMP_PHASE2_TUNNEL

  game of transformation-VPN-TRANSFORMSET

  PFS group2 Set

  ISAKMP_PHASE1_PARAMETERS Set isakmp-profile

  !

  Tunnel1 interface

  IP 10.10.10.1 255.255.255.252

  IP mtu 1450

  source of tunnel Loopback1

  tunnel destination 1.2.3.4

  ipv4 ipsec tunnel mode

  Tunnel ISAKMP_PHASE2_TUNNEL ipsec protection profile

  !

  Now when I look at the output of the command 'See the crypto ipsec his tu1 int' I get the following:

  ....

  Interface: Tunnel1

  Tag crypto map: x.x.x.x addr Tunnel1-head-0, local

  protégé of the vrf: (none)

  local ident (addr, mask, prot, port): (0.0.0.0/0.0.0.0/0/0)

  Remote ident (addr, mask, prot, port): (0.0.0.0/0.0.0.0/0/0)

  current_peer 1.2.3.4 port 500

  LICENCE, flags is {origin_is_acl},

  ....

  However, the peer on the other side do not accept the proposal, as it would like to have specific IP subnets on the IPSec security association proposal parameters. He would accept the policy if the identity local remote proxies, for example, would be 192.168.10.0/255.255.255.0/0/0 (local) and

  192.168.200.0/255.255.255.0/0/0 (remotely).

  Y at - it 'interesting' no IOS configuration for traffic configuration option on the profile of crypto? With the crypto map - basic configuration you can specify interesting traffic with an ACL under the crypto map configuration section.

  I'm in IOS version 15.1 (4) M with Advanced IP Services have together.

  Hello

  ASIT will always want to negotiate a whole as traffic selectors.

  What you MIGHT find is multi-SA DVTI configuration, in what remote end could say what proxy identity he would like to encrypt. (Supported from 15.2 M / T)

  Unfortunately, the ceveat of this configuration is this remote end needs to open the negotiation.

  M.

• transport mode, AH in IPSec AH tunnel mode

  Hello world.

  I read about Ipsec that contains two main protocols among others: AH and ESP.

  For now, I'm focused on AH only. I read the theory on AH and two modes AH may work: mode and tunnel Transport mode.

  (201.201.201.1) h1 - R1 (199.199.199.1) s0 - s0 (199.199.199.2) R2 - H2 (200.200.200.2)

  I would like to implement the following:

  Whenever R1 receives the ip packet to the H1 to H2, R1 must use AH in transport mode before it sends the packet to R2, in the same way, R2 must use AH in transport of packets sent by H2 H1, before mailing in R1.

  I just need an example on how we can configure R1 and R2 to accomplish the task above...

  Thanks for your help and have a great day.

  .

  Hi Sara,.

  Please find the example configuration for the GRE IPsec VPN using the mode of transport.

  (201.201.201.1) h1 - R1 (199.199.199.1) s0 - s0 (199.199.199.2) R2 - H2 (200.200.200.2)

  You can use the ACL to restrict to only the ports required for the vpn as udp 500, ah, gre and 4500 and you can check. I hope this helps.

  Also, you can find the site mentioned described to better understand the differences between the modes of transport or tunnel.

  R1:

  ===

  version 12.4

  !

  hostname R1

  !

  IP cef

  !

  !

  crypto ISAKMP policy 10

  preshared authentication

  address key crypto isakmp 199.199.199.2 CISCO

  !

  Crypto ipsec transform-set esp-3des esp-sha-hmac MyTransSet

  transport mode

  !

  Profile of crypto ipsec MyProfile

  game of transformation-MyTransSet

  !

  interface Tunnel0

  IP 10.10.10.1 255.255.255.252

  tunnel source 199.199.199.1

  tunnel destination 199.199.199.2

  ipv4 ipsec tunnel mode

  Profile of tunnel MyProfile ipsec protection

  !

  interface serial0

  199.199.199.1 IP address 255.255.255.0

  automatic duplex

  automatic speed

  !

  IP route 0.0.0.0 0.0.0.0 199.199.199.2

  !

  Line con 0

  line to 0

  line vty 0 4

  !

  !

  end

  ======================================================================

  R2

  =====

  version 12.4

  !

  hostname R2

  !

  !

  !

  IP cef

  !

  !

  crypto ISAKMP policy 10

  preshared authentication

  address key crypto isakmp 199.199.199.1 CISCO

  !

  !

  Crypto ipsec transform-set esp-3des esp-sha-hmac MyTransSet

  transport mode

  !

  Profile of crypto ipsec MyProfile

  game of transformation-MyTransSet

  !

  interface Tunnel0

  10.10.10.2 IP address 255.255.255.252

  tunnel source 199.199.199.2

  199.199.199.1 tunnel destination

  ipv4 ipsec tunnel mode

  Profile of tunnel MyProfile ipsec protection

  !

  interface serial0

  IP 199.199.199.2 255.255.255.0

  automatic duplex

  automatic speed

  !

  IP route 0.0.0.0 0.0.0.0 199.199.199.1

  !

  !

  Line con 0

  line to 0

  line vty 0 4

  !

  !

  end

  Please assess whether the information provided is useful.

  By

  Knockaert

• GET VPN tunnel mode and transport mode multicast

  Hello

  I really don't understand why GET VPN uses a tunnel for packets in multicast mode:

  Examples of a @multicast = 239.0.0.37:

  (1) here a package to GET VPN: | 239.0.0.37 | ESP | 239.0.0.37 | transport layer. Payload: : This way, he uses (two IP headers) IPSec tunnel mode.

  (2) here a package that I imagine to be better: | 239.0.0.37 | ESP | transport layer. Payload: : Mode of transport IPsec, 1 registered IP header = fewer bytes used.

  In both cases, the IP header cannot be secured, cause GET VPN Tunnel using the same multicast IP header (this is why it works so well...)

  I don't understand why Cisco uses model IPsec in tunnel mode to encapsulate packets instead of the mode of transport. I can't find a descent of answer to this question... Maybe my question is not relevant?

  Thanks for your replies.

  Concerning

  Stone,

  I quote DIG it

  It is worth noting that tunnel header preservation seems very similar to IPsec transport mode.
  However, the underlying IPsec mode of operation with GET VPN is IPsec tunnel mode. While
  IPsec transport mode reuses the original IP header and therefore adds less overhead to an IP
  packet (5% for IMIX packets; 1% for 1400-byte packets), IPsec transport mode suffers from
  fragmentation and reassembly limitations when used together with Tunnel Header Preservation
  and must not be used in GET VPN deployments where encrypted or clear packets might require
  fragmentation.
  

  In practice, reassambly concerns and initially odd behaviors with some encryption engines caused the recommendation to be tunnel mode.

  That being said, for large packages (where fresh important generals) overhead costs are minimal. For small packages (voice), the overhead is large, but the packet (after encapsulation) size should not be a problem.

  M.

• Strange problem in IPSec Tunnel - 8.4 NAT (2)

  Helloo all,.

  This must be the strangest question I've seen since the year last on my ASA.

  I have an ASA 5540, who runs the code of 8.4 (2) without any problem until I ran into this problem last week and I spent sleepless nights with no resolution! Then, take a deep breath and here is a brief description of my setup and the problem:

  A Simple IPSEC tunnel between my 8.4 (2) ASA 5540 and a Juniper SSG 140 6.3.0r9.0 (road OS based VPN) screen

  The tunnel rises without any problem but the ASA refused to encrypt the traffic but it decrypts with GLORY!

  Here are a few outputs debug, see the output and a package tracer output that also has an explanation of my problem of NAT WEIRD:

  my setup - (I won't get into the details of encryption tunnel as my tunnel negotiations are perfect and returns from the outset when the ASA is configured as response only)

  CISCO ASA - IPSec network details

  LAN - 10.2.4.0/28

  REMOTE NETWORK - 192.168.171.8/32

  JUNIPER SSG 140 - IPSec networks details

  ID OF THE PROXY:

  LAN - 192.168.171.8/32

  REMOTE NETWORK - 10.2.4.0/28

  Name host # sh cry counterpart his ipsec

  peer address:

  Tag crypto map: outside_map, seq num: 5, local addr:

  outside_cryptomap_4 to access extended list ip 10.2.4.0 allow 255.255.255.240 host 192.168.171.8

  local ident (addr, mask, prot, port): (10.2.4.0/255.255.255.240/0/0)

  Remote ident (addr, mask, prot, port): (192.168.171.8/255.255.255.255/0/0)

  current_peer:

  #pkts program: encrypt 0, #pkts: 0, #pkts digest: 0

  #pkts decaps: 72, #pkts decrypt: 72, #pkts check: 72

  compressed #pkts: 0, unzipped #pkts: 0

  #pkts uncompressed: 0, comp #pkts failed: 0, #pkts Dang failed: 0

  success #frag before: 0, failures before #frag: 0, #fragments created: 0

  Sent #PMTUs: 0, #PMTUs rcvd: 0, reassembly: 20th century / of frgs #decapsulated: 0

  #send errors: 0, #recv errors: 0

  local crypto endpt. : 0, remote Start. crypto: 0

  Path mtu 1500, fresh ipsec generals 58, media, mtu 1500

  current outbound SPI: 5041C19F

  current inbound SPI: 0EC13558

  SAS of the esp on arrival:

  SPI: 0x0EC13558 (247543128)

  transform: esp-3des esp-sha-hmac no compression

  running parameters = {L2L, Tunnel}

  slot: 0, id_conn: 22040576, crypto-card: outside_map

  calendar of his: service life remaining key (s): 3232

  Size IV: 8 bytes

  support for replay detection: Y

  Anti-replay bitmap:

  0xFFFFFFFF to 0xFFFFFFFF

  outgoing esp sas:

  SPI: 0x5041C19F (1346486687)

  transform: esp-3des esp-sha-hmac no compression

  running parameters = {L2L, Tunnel}

  slot: 0, id_conn: 22040576, crypto-card: outside_map

  calendar of his: service life remaining key (s): 3232

  Size IV: 8 bytes

  support for replay detection: Y

  Anti-replay bitmap:

  0x00000000 0x00000001

  CONTEXTS for this IPSEC VPN tunnel:

  # Sh asp table det vpn context host name

  VPN CTX = 0x0742E6BC

  By peer IP = 192.168.171.8

  Pointer = 0x78C94BF8

  State = upwards

  Flags = BA + ESP

  ITS = 0X9C28B633

  SPI = 0x5041C19D

  Group = 0

  Pkts = 0

  Pkts bad = 0

  Incorrect SPI = 0

  Parody = 0

  Bad crypto = 0

  Redial Pkt = 0

  Call redial = 0

  VPN = filter

  VPN CTX = 0x07430D3C

  By peer IP = 192.168.1.8

  Pointer = 0x78F62018

  State = upwards

  Flags = DECR + ESP

  ITS = 0X9C286E3D

  SPI = 0x9B6910C5

  Group = 1

  Pkts = 297

  Pkts bad = 0

  Incorrect SPI = 0

  Parody = 0

  Bad crypto = 0

  Redial Pkt = 0

  Call redial = 0

  VPN = filter

  outside_cryptomap_4 to access extended list ip 10.2.4.0 allow 255.255.255.240 host 192.168.171.8

  NAT (inside, outside) static source Ren - Ren - about destination static counterpart-host peer to route non-proxy-arp-search

  network of the Ren - around object

  subnet 10.2.4.0 255.255.255.240

  network of the host object counterpart

  Home 192.168.171.8

  HS cry ipsec his

  IKE Peer:

  Type: L2L role: answering machine

  Generate a new key: no State: MM_ACTIVE

  output packet tracer extracted a packet transmitted by the network of 10.2.4.0/28 to 192.168.171.8 host

  Phase: 7

  Type: VPN

  Subtype: encrypt

  Result: ALLOW

  Config:

  Additional information:

  Direct flow from returns search rule:

  ID = 0x7789d788, priority = 70, domain = encrypt, deny = false

  Hits = 2, user_data is0x742e6bc, cs_id = 0x7ba38680, reverse, flags = 0 x 0 = 0 protocol

  IP/ID=10.2.4.0 SRC, mask is 255.255.255.240, port = 0

  IP/ID=192.168.171.8 DST, mask is 255.255.255.255, port = 0, dscp = 0 x 0

  input_ifc = none, output_ifc = external

  VPN settings corresponding to the encrytpion + encapsulation and the hits here increment only when I run a test of tracer from my host on the remote peer inside package.

  A tracer complete package out for a packet of the 10.2.4.1 255.255.255.255 network to host 192.168.171.8:

  Phase: 1

  Type: ACCESS-LIST

  Subtype:

  Result: ALLOW

  Config:

  Implicit rule

  Additional information:

  Direct flow from returns search rule:

  ID = 0x77ebd1b0, priority = 1, domain = allowed, deny = false

  hits = 3037156, user_data = 0 x 0, cs_id = 0 x 0, l3_type = 0 x 8

  Mac SRC = 0000.0000.0000, mask is 0000.0000.0000

  DST = 0000.0000.0000 Mac, mask is 0100.0000.0000

  input_ifc = output_ifc = any to inside,

  Phase: 2

  Type:-ROUTE SEARCH

  Subtype: entry

  Result: ALLOW

  Config:

  Additional information:

  in 192.168.171.0 255.255.255.0 outside

  Phase: 3

  Type: IP-OPTIONS

  Subtype:

  Result: ALLOW

  Config:

  Additional information:

  Direct flow from returns search rule:

  ID = 0x77ec1030, priority = 0, sector = inspect-ip-options, deny = true

  hits = 212950, user_data = 0 x 0, cs_id = 0 x 0, reverse, flags = 0 x 0 = 0 protocol

  IP/ID=0.0.0.0 SRC, mask is 0.0.0.0, port = 0

  IP/ID=0.0.0.0 DST, mask is 0.0.0.0, port = 0, dscp = 0 x 0

  input_ifc = output_ifc = any to inside,

  Phase: 4

  Type:

  Subtype:

  Result: ALLOW

  Config:

  Additional information:

  Direct flow from returns search rule:

  ID = 0x7c12cb18, priority = 18, area = import-export flows, deny = false

  hits = 172188, user_data = 0x78b1f438, cs_id = 0 x 0, use_real_addr, flags = 0 x 0,

  IP/ID=0.0.0.0 SRC, mask is 0.0.0.0, port = 0

  IP/ID=0.0.0.0 DST, mask is 0.0.0.0, port = 0, dscp = 0 x 0

  input_ifc = output_ifc = any to inside,

  Phase: 5

  Type: NAT

  Subtype:

  Result: ALLOW

  Config:

  NAT (inside, outside) static source Ren - Ren - about destination static counterpart-host peer to route non-proxy-arp-search

  Additional information:

  Definition of static 10.2.4.1/2700 to 10.2.4.1/2700

  Direct flow from returns search rule:

  ID = 0x77e0a878, priority = 6, area = nat, deny = false

  hits = 9, user_data is 0x7b7360a8, cs_id = 0 x 0, use_real_addr, flags = 0 x 0, proto

  IP/ID=10.2.4.1 SRC, mask is 255.255.255.240, port = 0

  IP/ID=192.168.171.8 DST, mask is 255.255.255.255, port = 0, dscp = 0 x 0

  input_ifc = inside, outside = output_ifc

  
  

  (it's the weird NAT problem I see. I see the number of hits is increment only when I run the packet tracer understands even I have pings (traffic) the 192.168.171.8 constant welcomes the 10.2.4.1/28)-s'il please see the package I pasted after the capture section)

  Phase: 6

  Type: VPN

  Subtype: encrypt

  Result: ALLOW

  Config:

  Additional information:

  Direct flow from returns search rule:

  ID = 0x7b8751f8, priority = 70, domain = encrypt, deny = false

  hits = 3, user_data = 0x7432b74, cs_id = 0x7ba38680, reverse, flags = 0 x 0, proto

  IP/ID=10.2.4.1 SRC, mask is 255.255.255.240, port = 0

  IP/ID=192.168.171.8 DST, mask is 255.255.255.255, port = 0, dscp = 0 x 0

  input_ifc = none, output_ifc = external

  Phase: 7

  Type: VPN

  Subtype: ipsec-tunnel-flow

  Result: ALLOW

  Config:

  Additional information:

  Reverse flow from returns search rule:

  ID = 0x78b0c280, priority = 69 = ipsec-tunnel-flow area, deny = false

  hits = 154, user_data is 0x7435f94, cs_id = 0 x 0, reverse, flags = 0 x 0 = 0 protocol

  IP/ID=192.168.171.8 SRC, mask is 255.255.255.255, port = 0

  IP/ID=10.2.4.1 DST, mask is 255.255.255.240, port = 0, dscp = 0 x 0

  input_ifc = out, output_ifc = any

  Phase: 8

  Type: IP-OPTIONS

  Subtype:

  Result: ALLOW

  Config:

  Additional information:

  Reverse flow from returns search rule:

  ID = 0x77e7a510, priority = 0, sector = inspect-ip-options, deny = true

  hits = 184556, user_data = 0 x 0, cs_id = 0 x 0, reverse, flags = 0 x 0 = 0 protocol

  IP/ID=0.0.0.0 SRC, mask is 0.0.0.0, port = 0

  IP/ID=0.0.0.0 DST, mask is 0.0.0.0, port = 0, dscp = 0 x 0

  input_ifc = out, output_ifc = any

  Phase: 9

  Type: CREATING STREAMS

  Subtype:

  Result: ALLOW

  Config:

  Additional information:

  New workflow created with the 119880921 id, package sent to the next module

  Information module for forward flow...

  snp_fp_tracer_drop

  snp_fp_inspect_ip_options

  snp_fp_tcp_normalizer

  snp_fp_translate

  snp_fp_adjacency

  snp_fp_encrypt

  snp_fp_fragment

  snp_ifc_stat

  Information for reverse flow...

  snp_fp_tracer_drop

  snp_fp_inspect_ip_options

  snp_fp_ipsec_tunnel_flow

  snp_fp_translate

  snp_fp_tcp_normalizer

  snp_fp_adjacency

  snp_fp_fragment

  snp_ifc_stat

  Result:

  input interface: inside

  entry status: to the top

  entry-line-status: to the top

  output interface: outside

  the status of the output: to the top

  output-line-status: to the top

  Action: allow

  Hostname # sh Cap A1

  8 packets captured

  1: 12:26:53.376033 192.168.10.252 > 10.2.4.1: icmp: echo request

  2: 12:26:53.376597 10.2.4.1 > 192.168.10.252: icmp: echo reply

  3: 12:26:56.487905 192.168.171.8 > 10.2.4.1: icmp: echo request

  4: 12:27:01.489217 192.168.171.8 > 10.2.4.1: icmp: echo request

  5: 12:27:03.378245 192.168.10.252 > 10.2.4.1: icmp: echo request

  6: 12:27:03.378825 10.2.4.1 > 192.168.10.252: icmp: echo reply

  7: 12:27:06.491597 192.168.171.8 > 10.2.4.1: icmp: echo request

  8: 12:27:11.491856 192.168.171.8 > 10.2.4.1: icmp: echo request

  8 packets shown

  As you can see, there is no echo response packet at all because the package may not be wrapped while he was sent to.

  I'm Karen with it. In addition, he is a firewall multi-tenant live production with no problems at all outside this for a Juniper ipsec tunnel!

  Also, the 192.168.10.0/24 is another remote network of IPSec tunnel to this network of 10.2.4.0/28 and this IPSEC tunnel has a similar Juniper SSG 140 screen os 6.3.0r9.0 at the remote end and this woks like a charm with no problems, but the 171 is not be encrypted by the ASA at all.

  If someone could help me, that would be greatt and greatly appreciated!

  Thanks heaps. !

  Perfect! Now you must find something else inside for tomorrow--> forecast rain again

  Please kindly marks the message as answered while others may learn from it. Thank you.

• IPSec tunnels does not work

  I have 2 Cat6, with IPsec SPA card, while the other did not.

  I tried setting IPsec tunnel between them, but somehow can't bring up the tunnel, can someone help me to watch set it up?

  A (with SPA):

  crypto ISAKMP policy 1

  BA aes 256

  preshared authentication

  Group 5

  ISAKMP crypto cisco123 key address 0.0.0.0 0.0.0.0

  ISAKMP crypto keepalive 10

  Crypto ipsec transform-set esp - aes 256 esp-sha-hmac testT1

  !

  Crypto ipsec profile P1

  Set transform-set testT1

  !

  Crypto call admission limit ike his 3000

  !

  Crypto call admission limit ike in-negotiation-sa 115

  !

  interface Tunnel962

  Loopback962 IP unnumbered

  tunnel GigabitEthernet2/37.962 source

  tunnel destination 172.16.16.6

  ipv4 ipsec tunnel mode

  Profile of tunnel P1 ipsec protection

  interface GigabitEthernet2/37.962

  encapsulation dot1Q 962

  IP 172.16.16.5 255.255.255.252

  interface Loopback962

  1.1.4.200 the IP 255.255.255.255

  IP route 2.2.4.200 255.255.255.255 Tunnel962

  B (wuthout SPA):

  crypto ISAKMP policy 1

  BA aes 256

  preshared authentication

  Group 5

  ISAKMP crypto cisco123 key address 0.0.0.0 0.0.0.0

  !

  !

  Crypto ipsec transform-set esp - aes 256 esp-sha-hmac T1

  !

  Crypto ipsec profile P1

  game of transformation-T1

  interface Tunnel200

  Loopback200 IP unnumbered

  tunnel GigabitEthernet2/1.1 source

  tunnel destination 172.16.16.5

  ipv4 ipsec tunnel mode

  Profile of tunnel T1 ipsec protection

  interface Loopback200

  2.2.4.200 the IP 255.255.255.255

  interface GigabitEthernet2/1.1

  encapsulation dot1Q 962

  IP 172.16.16.6 255.255.255.252

  IP route 1.1.4.200 255.255.255.255 Tunnel200

  I can ping from 172.16.16.6 to 172.16.16.5, but the tunnel just can not upwards. When I turned on "debugging ipsec cry ' and ' debug cry isa", nothing comes out, when I trun on 'cry of debugging sciences', I got:

  "00:25:17: crypto_engine_select_crypto_engine: can't handle more."

  Hello

  You need a map of IPSEC SPA on chassis B do IPSEC encryption. Please see the below URL for more details.

  Without a SPA-IPSEC - 2G or IPsec VPN Services Module of acceleration, the IPsec network security feature (configured with the crypto ipsec command) is supported in the software only for administrative for Catalyst 6500 series switches and routers for the Cisco 7600 Series connections.

  http://www.Cisco.com/en/us/docs/switches/LAN/catalyst6500/IOS/12.2SXF/native/release/notes/OL_4164.html

  Kind regards

  Arul

  * Rate pls if it helps *.

• Public static IPsec tunnel between two routers cisco [VRF aware]

  Hi all

  I am trying to configure static IPsec tunnel between two routers. Router R1 has [no VRF] only global routing table.

  Router R2 has two routing tables:

  * vrf INET - used for internet connectivity

  * global routing table - used for VPN connections

  Here are the basic configs:

  R1

  crypto ISAKMP policy 1
  BA 3des
  md5 hash
  preshared authentication
  Group 2
  ISAKMP crypto key 7V7u841k2D3Q7v98d6Y4z0zF address 203.0.0.3
  invalid-spi-recovery crypto ISAKMP
  !
  Crypto ipsec transform-set esp - aes 256 esp-sha-hmac TRSET_AES-256_SHA
  transport mode
  !
  Crypto ipsec TUNNEL-IPSEC-PROTECTION profile
  game of transformation-TRSET_AES-256_SHA
  !
  interface Loopback0
  10.0.1.1 IP address 255.255.255.255
  IP ospf 1 zone 0
  !
  interface Tunnel0
  IP 192.168.255.34 255.255.255.252
  IP ospf 1 zone 0
  source of tunnel FastEthernet0/0
  tunnel destination 203.0.0.3
  ipv4 ipsec tunnel mode
  Ipsec TUNNEL-IPSEC-PROTEC protection tunnel profile
  !
  interface FastEthernet0/0
  IP 102.0.0.1 255.255.255.0

  !

  IP route 203.0.0.3 255.255.255.255 FastEthernet0/0 102.0.0.2

  #######################################################

  R2

  IP vrf INET
  RD 1:1
  !
  Keyring cryptographic test vrf INET
  address of pre-shared-key 102.0.0.1 key 7V7u841k2D3Q7v98d6Y4z0zF
  !
  crypto ISAKMP policy 1
  BA 3des
  md5 hash
  preshared authentication
  Group 2
  invalid-spi-recovery crypto ISAKMP
  crypto isakmp profile test
  door-key test
  function identity address 102.0.0.1 255.255.255.255
  !
  Crypto ipsec transform-set esp - aes 256 esp-sha-hmac TRSET_AES-256_SHA
  transport mode
  !
  Crypto ipsec TUNNEL-IPSEC-PROTECTION profile
  game of transformation-TRSET_AES-256_SHA
  Test Set isakmp-profile
  !
  interface Loopback0
  IP 10.0.2.2 255.255.255.255
  IP ospf 1 zone 0
  !
  interface Tunnel0
  IP 192.168.255.33 255.255.255.252
  IP ospf 1 zone 0
  source of tunnel FastEthernet0/0
  tunnel destination 102.0.0.1
  ipv4 ipsec tunnel mode
  tunnel vrf INET
  Ipsec TUNNEL-IPSEC-PROTEC protection tunnel profile
  !
  interface FastEthernet0/0
  IP vrf forwarding INET
  IP 203.0.0.3 255.255.255.0

  !

  IP route 102.0.0.1 255.255.255.255 FastEthernet0/0 203.0.0.2

  #######################################################

  There is a router between R1 and R2, it is used only for connectivity:

  interface FastEthernet0/0
  IP 102.0.0.2 255.255.255.0
  !
  interface FastEthernet0/1
  IP 203.0.0.2 255.255.255.0

  The problem that the tunnel is not coming, I can't pass through phase I.

  The IPsec VPN are not my strength. So if someone could show me what mistake I make, I'd appreciate it really.

  I joined ouptup #debug R2 crypto isakmp

  Source and destination Tunnel0 is belong to VRF INET, the static route need to be updated.

  IP route vrf INET 102.0.0.1 255.255.255.255 FastEthernet0/0 203.0.0.2

  crypto isakmp profile test

  VRF INET

  door-key test
  function identity address 102.0.0.1 255.255.255.255

• IPSec tunnel between 2 routers

  Hello

  I am trying to configure an IPSec VPN tunnel between 2 routers Cisco, connected to the internet via the ATM interface, my router is a 1841 with the network 10.200.36.0 address the remote router is a Cisco network 192.168.9.0 address with 877.

  I have tryied to follow some tutorials, unsuccessfully, because I can't always ping all IP addresses on the remote network and also the VPN tunnel is not up!

  Can help you please give me a configuration model, or maybe let me know how to configure step by step on mine and remote router?

  Thank you very much!

  Concerning

  Riccardo

  Here is an example. x.x.x.x and y.y.y.y are the public IPs of routers:

  ROUTER1 hostname

  !

  crypto ISAKMP policy 10

  BA aes 256

  AUTH pre

  Group 5

  !

  ISAKMP crypto key cisco1234 address y.y.y.y

  !

  Crypto ipsec transform-set ESP-AES256-SHA1 esp - aes 256 esp-sha-hmac

  !

  Profile of crypto ipsec TunnelProfile

  the transform ESP-AES256-SHA1 value

  !

  interface Tunnel0

  IP 10.255.255.0 255.255.255.254

  tunnel Dialer source 0

  tunnel destination y.y.y.y

  ipv4 ipsec tunnel mode

  Tunnel TunnelProfile ipsec protection profile

  !

  interface Dialer0

  IP x.x.x.x

  !

  IP route 192.168.9.0 255.255.255.0 Tunnel0

  hostname ROUTER2

  !

  crypto ISAKMP policy 10

  BA aes 256

  AUTH pre

  Group 5

  !

  ISAKMP crypto cisco1234 key address x.x.x.x

  !

  Crypto ipsec ESP-AES256-SHA1 transform-set esp - aes 256 esp-sha-hmac

  !

  Profile of crypto ipsec TunnelProfile

  the transform ESP-AES256-SHA1 value

  !

  interface Tunnel0

  IP 10.255.255.1 255.255.255.254

  tunnel Dialer source 0

  tunnel destination x.x.x.x

  ipv4 ipsec tunnel mode

  Tunnel TunnelProfile ipsec protection profile

  !

  interface Dialer0

  IP address y.y.y.y

  !

  IP route 10.200.36.0 255.255.255.0 Tunnel0

  --
  Don't stop once you have upgraded your network! Improve the world by lending money to low-income workers:
  http://www.Kiva.org/invitedBy/karsteni

• Cisco 1841 ipsec tunnel protocol down after a minute

  I have a strange problem where im manages to get a tha cisco ipsec tunnel 1841 to a RV016 linksys/cisco for about a minute and ping/encrypt the packets through the linen for about a minute before it breaks down. I tried different configuration and it all results in the tunnel for a minute then descend to come. I don't know if im hitting a bug and decide to if im doing something wrong.

  any help is appreciated paul

  RV016 firmware 2.0.18

  Cisco 1841: C1841-ADVENTERPRISEK9-M), Version 12.4 (24) T

  my config

  no default isakmp crypto policy

  !

  crypto ISAKMP policy 1

  BA 3des

  md5 hash

  preshared authentication

  Group 2

  lifetime 28800

  ISAKMP crypto key address 0.0.0.0 eaton1234 0.0.0.0

  !

  !

  Crypto ipsec transform-set esp-3des esp-sha-hmac ESSTS

  transport mode

  no default crypto ipsec transform-set

  !

  Crypto ipsec profile ipsec_profile1

  Description in the location main site to site VPN tunnel

  game of transformation-ESSTS

  PFS group2 Set

  !

  !

  !

  !

  !

  !

  !

  Tunnel1 interface

  Description of the location of the hand

  IP unnumbered Serial0/0/0

  source of tunnel Serial0/0/0

  destination 209.213.x.x tunnel

  ipv4 ipsec tunnel mode

  tunnel path-mtu-discovery

  protection of ipsec profile ipsec_profile1 tunnel

  !

  a debug output

  Apr 24 16:42:07: IPSEC (validate_proposal_request): part #1 the proposal

  Apr 24 16:42:07: IPSEC (validate_proposal_request): part #1 of the proposal

  (Eng. msg key.) Local INCOMING = 209.213.xx.46, distance = 209.213.xx.164,.

  local_proxy = 10.20.86.0/255.255.255.0/0/0 (type = 4),

  remote_proxy = 10.0.0.0/255.255.255.0/0/0 (type = 4),

  Protocol = ESP, transform = NONE (Tunnel),

  lifedur = 0 and 0kb in

  SPI = 0 x 0 (0), id_conn = 0, keysize = 0, flags = 0 x 0

  Apr 24 16:42:07: mapdb Crypto: proxy_match

  ADR SRC: 10.20.86.0

  ADR DST: 10.0.0.0

  Protocol: 0

  SRC port: 0

  DST port: 0

  Apr 24 16:42:07: IPSEC (key_engine): had an event of the queue with 1 KMI message (s)

  Apr 24 16:42:07: mapdb Crypto: proxy_match

  ADR SRC: 10.20.86.0

  ADR DST: 10.0.0.0

  Protocol: 0

  SRC port: 0

  DST port: 0

  Apr 24 16:42:07: IPSEC (policy_db_add_ident): src dest 10.0.0.0, 10.20.86.0, dest_port

  0

  Apr 24 16:42:07: IPSEC (create_sa): its created.

  (his) sa_dest = 209.213.xx.46, sa_proto = 50,.

  sa_spi = 0x4CF51011 (1291128849).

  sa_trans = sa_conn_id of hmac-sha-esp, esp-3des = 2045

  sa_lifetime(k/sec) = (4463729/3600)

  Apr 24 16:42:07: IPSEC (create_sa): its created.

  (his) sa_dest = 209.213.xx.164, sa_proto = 50,.

  sa_spi = 0x1EB77DAF (515341743).

  sa_trans = sa_conn_id of hmac-sha-esp, esp-3des = 2046

  sa_lifetime(k/sec) = (4463729/3600)

  Apr 24 16:42:07: % LINEPROTO-5-UPDOWN: Line protocol on Interface Tunnel1, sta changed

  you to

  Apr 24 16:42:07: IPSEC (key_engine): had an event of the queue with 1 KMI message (s)

  Apr 24 16:42:07: IPSEC (key_engine_enable_outbound): rec would notify of ISAKMP

  Apr 24 16:42:07: IPSEC (key_engine_enable_outbound): select SA with spinnaker 515341743/50

  Apr 24 16:42:07: IPSEC (update_current_outbound_sa): update peer 209.213.xx.164 curre

  NT his outgoing to SPI 1EB77DAF

  Apr 24 16:42:12: IPSEC (key_engine): request timer shot: count = 1,.

  local (identity) = 209.213.xx.46, distance = 209.213.xx.164,

  local_proxy = 0.0.0.0/0.0.0.0/0/0 (type = 4),

  remote_proxy = 0.0.0.0/0.0.0.0/0/0 (type = 4)

  Apr 24 16:42:12: IPSEC (sa_request):,.

  (Eng. msg key.) Local OUTGOING = 209.213.xx.46, distance = 209.213.xx.164,.

  local_proxy = 0.0.0.0/0.0.0.0/0/0 (type = 4),

  remote_proxy = 0.0.0.0/0.0.0.0/0/0 (type = 4),

  Protocol = ESP, transform = esp-3des esp-sha-hmac (Tunnel),

  lifedur = 3600 s and KB 4608000,

  SPI = 0 x 0 (0), id_conn = 0, keysize = 0, flags = 0 x 0

  Apr 24 16:42:42: IPSEC (key_engine): request timer shot: count = 2,.

  local (identity) = 209.213.xx.46, distance = 209.213.xx.164,

  local_proxy = 0.0.0.0/0.0.0.0/0/0 (type = 4),

  remote_proxy = 0.0.0.0/0.0.0.0/0/0 (type = 4)

  Apr 24 16:42:42: % LINEPROTO-5-UPDOWN: Line protocol on Interface Tunnel1, sta changed

  you all the downu

  All possible debugging has been disabled

  I would try to set up a VPN Interface virtual Tunnel on the IOS router base and the value of defined transformation in tunnel mode no transport.

  In history, I have had several issues with VPN between a router IOS and the series RV.

• Double IPSec tunnel between routers

  I am facing the following challenge:

  I have two routers and want to build two IPSec encapsulated between them, with the help of ASIT tunnel interfaces.

  The interaces two tunnel would in that case the same source and destination ip addresses.

  With a single tunnel interface defined, it works well, however, as soon as the second tunnel interface is defined, the first breaks down.

  Here is an example configuration:

  interface Tunnel0
  IP 192.168.1.1 255.255.255.252
  source of tunnel Serial1/0
  tunnel destination 10.1.1.6
  ipv4 ipsec tunnel mode
  protection of ipsec profile ipsecprofile tunnel
  !
  Tunnel1 interface
  IP 192.168.1.5 255.255.255.252
  source of tunnel Serial1/0
  tunnel destination 10.1.1.6
  ipv4 ipsec tunnel mode
  protection of ipsec profile ipsecprofile tunnel
  !

  In fact, the matter is rather a conceptual issue than a direct. What is the root cause, this type of configuration does not work?

  ESP protocol is the distinction between endponits ESP SAs based on SPI identifier as well, isn't? If so, what is wrong here?

  Thanks in advance...

  Hi Frank,.

  As a general rule, you cannot have two interfaces of tunnel with the same tunnel source (series 1/0) and destinations (10.1.1.6) tunnel; with the same method (ipv4) tunel.

  The work around that would be to bounce one of the tunnels on a loopback interface.

  This tunnel 1: tunnel_interface_1 - series 1/0---internet---10.1.1.6

  and tunnel 2: tunnel_interface_2---loopback---serial1/0---internet---10.1.1.6

  In this way the two tunnels can be up at the same time.

  I hope this helps.

  -Shrikant

  P.S.: Please check question one answer, if it has been resolved. Note the useful messages. Thank you.

• IPsec VPN between two routers - mode ESP Transport and Tunnel mode

  Hi experts,

  I have this question about the Transport mode and Tunnel mode for awhile.

  Based on my understanding of 'Transport' mode is not possible because you always original "internal" private in the IP headers or IP addresses. They are always different as public IP on interfaces enabled with Crypto Card addresses. When encapsulated in the VPN tunnel, the internal IP addresses must be included or the remote VPN router won't know where to forward the packet.

  To test, I built a simple GNS3 with three routers laboratory. R1 and R3 are configured as VPN routers and the R2 must simulate Internet.

  My configs are also very basic. The R2 is routing between 1.1.1.0/24 and 2.2.2.0/24. It is defined as the gateway of R1 and R3.

  R1:

  crypto ISAKMP policy 100
  BA aes
  preshared authentication
  Group 2
  ISAKMP crypto key 123456 address 2.2.2.2
  !
  Crypto ipsec transform-set ESP_null null esp esp-sha-hmac
  !
  10 map ipsec-isakmp crypto map
  defined peer 2.2.2.2
  transformation-ESP_null game
  match address VPN

  !

  list of IP - VPN access scope
  ip permit 192.168.1.0 0.0.0.255 10.0.0.0 0.0.0.255
  !

  R3:

  crypto ISAKMP policy 100
  BA aes
  preshared authentication
  Group 2
  ISAKMP crypto key 123456 address 1.1.1.2
  !
  !
  Crypto ipsec transform-set ESP_null null esp esp-sha-hmac
  !
  10 map ipsec-isakmp crypto map
  defined peer 1.1.1.2
  transformation-ESP_null game
  match address VPN

  !

  list of IP - VPN access scope
  Licensing ip 10.0.0.0 0.0.0.255 192.168.1.0 0.0.0.255

  I configured transform-"null" value, while it will not encrypt the traffic.

  Then I tried the two 'transport' mode and mode "tunnel". I ping a host in the internal network of the R1 to another host in the internal network of the R3. I also tried 'telnet'. I also captured packets and carefully compared in both modes.

  Packets encapsulated in exactly the same way!

  It's just SPI + sequence No. + + padding

  I will attach my screenshots here for you guys to analyze it. I would be grateful for any explanation. I confused maybe just when it comes to the NAT...

  I guess my next step is to check if the two modes to make the difference when the GRE is used.

  Thank you

  Difan

  Hi Difan,

  As you point out the mode of transport is not always applicable (i.e. applicable if IP source and destination is equal to corresnpoding proxy IDs).

  A typical scenario in this mode of transport is used:

  -Encryption between two hosts

  -GRE tunnels

  -L2TP over IPsec

  Even if you set "transport mode" this does not mean that it will be used. IOS routers and I blieve also ASA will perform backup even if the mode of transport is configured but does not apply in tunnel mode.

  I can take a look at your traces to sniff, but all first can you please check if you transport mode on your ipsec security associations? "See the crypto ipsec his" exit you will show the tunnel or transport mode.

  HTH,

  Marcin

• IPSec Tunnel between Cisco 2801 and Netscren 50 with NAT and static

  Hello

  My problem isn't really the IPSec connection between two devices (it is already done...) But my problem is that I have a mail server on the site of Cisco, who have a static NAT from inside to outside. Due to the static NAT, I do not see the server in the VPN tunnel. I found a document that almost describes the problem:

  "Configuration of a router IPSEC Tunnel private-to-private network with NAT and static" (Document ID 14144)

  NAT takes place before the encryption verification!

  In this document, the solution is 'routing policy' using the loopback interface. But, how can I handle this with the Netscreen firewall. Someone has an idea?

  Thanks for any help

  Best regards

  Heiko

  Hello

  Try to change your static NAT with static NAT based policy.

  That is to say the static NAT should not be applicable for VPN traffic

  permissible static route map 1

  corresponds to the IP 104

  access-list 104 refuse host ip 10.1.110.10 10.1.0.0 255.255.0.0

  access-list 104 allow the host ip 10.1.110.10 all

  IP nat inside source static 10.1.110.10 81.222.33.90 map of static route

  HTH

  Kind regards

  GE.

• Policy Nat and IPSec tunnel

  Hello

  I have a Cisco IOS router and you want to configure an IPSec tunnel between myself and the client.  Unfortunately, we have two overlapping of 10 network IP addresses.

  Is it possible for me to just Nat addresses IP on my side or should the customer Nat as well?

  I have configured NAT on the inside of the interface for 10.134.206.1 to 192.168.156.6 so that Nat happens before that packages are encrypted in the tunnel, however tunnel is not coming.    The client uses a sonic firewall and allowed their 10.91.0.0/16 network 192.168.156.0/24.

  See attachment

  Kind regards

  They are wrong to installation.  Remote local networks are not 10.134.206.0 and 10.134.206/42.  It is simply your public IP address.