Site-to-Site VPN IPSEC falls intermittently

Site-to-Site VPN IPSEC falls intermittently

I am currently having a problem with a VPN from Site to Site traffic not only not intermittently. When the problem occurs, I can't Ping the remote site to the AC Site. But I can solve the problem by Pinging from HQ at the Remote Site. My network is currently configured as follows

-------HQ------

7.0 (4) version of pix 515 with card Ethernet 4 ports.

Outside of the interface connected to the Broadband DSL link.

Outside2 Interface connected to the second link DSL broadband

-Distance-

I have 4 Remote Sites. 2 sites connect you to each connection to wide band at HQ to spread the load to HQ

6.3 (5) pix 501 version

# The problem #.

All VPN establishes successfully to the HQ Pix

Intermittently, a remote site will report that they cannot connect to servers/services in the HQ. When I do a show crypto ipsec's and see the crypto isakmp his headquarters there is no entry for the remote site. However when I do the same on the remote site there is an entry for the HQ. With debugging on the remote site pix I try to ping from a pc to the HQ server and I get the following (see below). If I do a "ipsec Isakmp security association claire crypto ' and ' clear crypto ipsec his ' on the pix of remote site, then I can successfully ping all servers in headquarters.

This problem seems to have taken place only when I upgraded the pix of a 501 to 515 and added another 2 remote sites and a second broadband, as described above. I'm afraid that there is a problem with software version 7 Pix. Any advice would be greatly appreciated.

Console record Carrick-PIX01 (config) # 7

Carrick-PIX01 (config) # ter Lun

Output Carrick-PIX01 (config) #.

Carrick-PIX01 # debug crypto ipsec

Carrick-PIX01 # debug crypto isakmp

Carrick-PIX01 #.

ISAKMP (0:0): sending of NAT - T vendor ID - rev 2 & 3

ISAKMP (0): early changes of Main Mode

ISAKMP (0): retransmission of the phase 1 (0)...

ISAKMP (0): retransmission of the phase 1 (1)...

ISAKMP (0): retransmission of the phase 1 (2)...

Carrick-PIX01 #.

Carrick-PIX01 #.

ISAKMP (0): retransmission of the phase 1 (3)...

Carrick-PIX01 #.

Carrick-PIX01 #.

ISAKMP (0): retransmission of the phase 1 (4)... IPSec (key_engine): request timer shot: count = 1,.

(identity) local = OUTER-IP, distance = 86.43.74.16,.

local_proxy = LAN-OFFICE/255.255.255.0/0/0 (type = 4),

remote_proxy = 194.x.x.x.x.255.0/0/0 (type = 4)

ISAKMP (0): delete SA: CBC EXTERNAL IP, dst 86.43.74.16

ISADB: Reaper checking HIS 0x10c167c, id_conn = 0 DELETE IT!

Peer VPN: ISAKMP: Peer Info for 86.43.74.16/500 not found - peer: 1

ISADB: Reaper checking HIS 0x10ca914, id_conn = 0

Can force you the ISAKMP Keepalive, value from IPSec Security Association idle time and on the other. The problem should be solved

ISAKMP crypto keepalive 30

Crypto ipsec security association temps_inactivite 60

Let me know if it helps

Tags: Cisco Security

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    Could you please give me the solution how is that possible?

    Concerning

    Uzair Hussain

    Hi uzair.infotech,

    Looks like you need to set up a grouping between the 3 sites, at the end of that your topology will look like this:

    INFO - RITA - NIDA

    You can check this guide that explains step by step how to configure grouping:

    https://supportforums.Cisco.com/document/12752536/how-configure-site-sit...

    Hope this info helps!

    Note If you help!

    -JP-

  • Troubleshooting IPSec Site to Site VPN between ASA and 1841

    Hi all

    in the past I've implemented several VPN connections between the devices of the SAA. So I thought a site link between an ASA site and 1841 would be easier... But it seems I was mistaken.

    I configured a VPN Site to Site, as it has been described in the Document ID: SDM 110198: IPsec Site to Site VPN between ASA/PIX and an example of IOS Router Configuration (I have not used SDM but CCP).

    I have run the wizards on the ASA with ASDM and the current IOS version 15.1 1841, with CCP.

    It seems to Phase 1 and 2 are coming although my ASA in ADSM reports (monitoring > VPN > VPN statistics > Sessions) a tunnel established with some of the Tx traffic but 0 Rx traffic),

    On the ASA:

    Output of the command: "sh crypto ipsec its peer 217.xx.yy.zz.

    address of the peers: 217.86.154.120
    Crypto map tag: VPN-OUTSIDE, seq num: 2, local addr: 62.aa.bb.cc

    access extensive list ip 192.168.37.0 outside_2_cryptomap_1 allow 255.255.255.0 172.20.2.0 255.255.255.0
    local ident (addr, mask, prot, port): (LAN-A/255.255.255.0/0/0)
    Remote ident (addr, mask, prot, port): (LAN-G/255.255.255.0/0/0)
    current_peer: 217.xx.yy.zz

    #pkts program: 400, #pkts encrypt: 400, #pkts digest: 400
    #pkts decaps: 0, #pkts decrypt: 0, #pkts check: 0
    compressed #pkts: 0, unzipped #pkts: 0
    #pkts uncompressed: 400, 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. : 62.aa.bb.cc, remote Start crypto. : 217.xx.yy.zz

    Path mtu 1500, fresh ipsec generals 58, media, mtu 1500
    current outbound SPI: 39135054
    current inbound SPI: B2E9E500

    SAS of the esp on arrival:
    SPI: 0xB2E9E500 (3001672960)
    transform: esp-3des esp-sha-hmac no compression
    running parameters = {L2L, Tunnel, PFS 2 group}
    slot: 0, id_conn: 100327424, crypto-map: VPN-OUTSIDE
    calendar of his: service life remaining (KB/s) key: (4374000/1598)
    Size IV: 8 bytes
    support for replay detection: Y
    Anti-replay bitmap:
    0x00000000 0x00000001
    outgoing esp sas:
    SPI: 0 x 39135054 (957567060)
    transform: esp-3des esp-sha-hmac no compression
    running parameters = {L2L, Tunnel, PFS 2 group}
    slot: 0, id_conn: 100327424, crypto-map: VPN-OUTSIDE
    calendar of his: service life remaining (KB/s) key: (4373976/1598)
    Size IV: 8 bytes
    support for replay detection: Y
    Anti-replay bitmap:
    0x00000000 0x00000001

    Output of the command: "sh crypto isakmp his."

    HIS active: 4
    Generate a new key SA: 0 (a tunnel report Active 1 and 1 to generate a new key during the generate a new key)
    Total SA IKE: 4

    IKE Peer: 217.xx.yy.zz
    Type: L2L role: initiator
    Generate a new key: no State: MM_ACTIVE

    On the 1841

    1841 crypto isakmp #sh its
    IPv4 Crypto ISAKMP Security Association
    DST CBC conn-State id
    217.86.154.120 62.153.156.163 QM_IDLE 1002 ACTIVE

    1841 crypto ipsec #sh its

    Interface: Dialer1
    Tag crypto map: SDM_CMAP_1, local addr 217.86.154.120

    protégé of the vrf: (none)
    local ident (addr, mask, prot, port): (172.20.2.0/255.255.255.0/0/0)
    Remote ident (addr, mask, prot, port): (192.168.37.0/255.255.255.0/0/0)
    current_peer 62.153.156.163 port 500
    LICENCE, flags is {origin_is_acl},
    #pkts program: encrypt 0, #pkts: 0, #pkts digest: 0
    #pkts decaps: 585, #pkts decrypt: 585, #pkts check: 585
    compressed #pkts: 0, unzipped #pkts: 0
    #pkts uncompressed: 0, #pkts compr. has failed: 0
    #pkts not unpacked: 0, #pkts decompress failed: 0
    Errors #send 0, #recv 0 errors

    local crypto endpt. : 217.86.154.120, remote Start crypto. : 62.153.156.163
    Path mtu 1452, ip mtu 1452, ip mtu BID Dialer1
    current outbound SPI: 0xB2E9E500 (3001672960)
    PFS (Y/N): Y, Diffie-Hellman group: group2

    SAS of the esp on arrival:
    SPI: 0 x 39135054 (957567060)
    transform: esp-3des esp-sha-hmac.
    running parameters = {Tunnel}
    Conn ID: 2003, flow_id: FPGA:3, sibling_flags 80000046, card crypto: SDM_CMAP_1
    calendar of his: service life remaining (k/s) key: (4505068/1306)
    Size IV: 8 bytes
    support for replay detection: Y
    Status: ACTIVE

    the arrival ah sas:

    SAS of the CFP on arrival:

    outgoing esp sas:
    SPI: 0xB2E9E500 (3001672960)
    transform: esp-3des esp-sha-hmac.
    running parameters = {Tunnel}
    Conn ID: 2004, flow_id: FPGA:4, sibling_flags 80000046, card crypto: SDM_CMAP_1
    calendar of his: service life remaining (k/s) key: (4505118/1306)
    Size IV: 8 bytes
    support for replay detection: Y
    Status: ACTIVE

    outgoing ah sas:

    outgoing CFP sas:

    Interface: virtual Network1
    Tag crypto map: SDM_CMAP_1, local addr 217.86.154.120

    protégé of the vrf: (none)
    local ident (addr, mask, prot, port): (172.20.2.0/255.255.255.0/0/0)
    Remote ident (addr, mask, prot, port): (192.168.37.0/255.255.255.0/0/0)
    current_peer 62.153.156.163 port 500
    LICENCE, flags is {origin_is_acl},
    #pkts program: encrypt 0, #pkts: 0, #pkts digest: 0
    #pkts decaps: 585, #pkts decrypt: 585, #pkts check: 585
    compressed #pkts: 0, unzipped #pkts: 0
    #pkts uncompressed: 0, #pkts compr. has failed: 0
    #pkts not unpacked: 0, #pkts decompress failed: 0
    Errors #send 0, #recv 0 errors

    local crypto endpt. : 217.86.154.120, remote Start crypto. : 62.153.156.163
    Path mtu 1452, ip mtu 1452, ip mtu BID Dialer1
    current outbound SPI: 0xB2E9E500 (3001672960)
    PFS (Y/N): Y, Diffie-Hellman group: group2

    SAS of the esp on arrival:
    SPI: 0 x 39135054 (957567060)
    transform: esp-3des esp-sha-hmac.
    running parameters = {Tunnel}
    Conn ID: 2003, flow_id: FPGA:3, sibling_flags 80000046, card crypto: SDM_CMAP_1
    calendar of his: service life remaining (k/s) key: (4505068/1306)
    Size IV: 8 bytes
    support for replay detection: Y
    Status: ACTIVE

    the arrival ah sas:

    SAS of the CFP on arrival:

    outgoing esp sas:
    SPI: 0xB2E9E500 (3001672960)
    transform: esp-3des esp-sha-hmac.
    running parameters = {Tunnel}
    Conn ID: 2004, flow_id: FPGA:4, sibling_flags 80000046, card crypto: SDM_CMAP_1
    calendar of his: service life remaining (k/s) key: (4505118/1306)
    Size IV: 8 bytes
    support for replay detection: Y
    Status: ACTIVE

    outgoing ah sas:

    outgoing CFP sas:

    It seems that the routing on the 1841 is working properly as I can tear down the tunnel and relaunch in scathing a host on the network of 1841, but not vice versa.

    Trounleshoot VPN of the 1841 report shows a message like "the following sources are forwarded through the interface card crypto.      (172.20.2.0 1) go to "Configure-> routing" and correct the routing table.

    I have not found an error on the 1841 config so if one of the guys reading this thread has an idea I appreciate highly suspicion!

    It's the running of the 1841 configuration

    !
    version 15.1
    horodateurs service debug datetime msec
    Log service timestamps datetime msec
    encryption password service
    !
    host name 1841
    !
    boot-start-marker
    start the system flash c1841-adventerprisek9 - mz.151 - 1.T.bin
    boot-end-marker
    !
    logging buffered 51200 notifications
    !
    AAA new-model
    !
    !
    AAA authentication login default local
    !
    AAA - the id of the joint session
    !
    iomem 20 memory size
    clock timezone PCTime 1
    PCTime of summer time clock day March 30, 2003 02:00 October 26, 2003 03:00
    dot11 syslog
    IP source-route
    !
    No dhcp use connected vrf ip
    !
    IP cef
    no ip bootp Server
    IP domain name test
    name of the IP-server 194.25.2.129
    name of the IP-server 194.25.2.130
    name of the IP-server 194.25.2.131
    name of the IP-server 194.25.2.132
    name of the IP-server 194.25.2.133
    No ipv6 cef
    !
    Authenticated MultiLink bundle-name Panel
    !
    !
    object-group network phone
    VoIP phone description
    Home 172.20.2.50
    Home 172.20.2.51
    !
    redundancy
    !
    !
    controller LAN 0/0/0
    atm mode
    Annex symmetrical shdsl DSL-mode B
    !
    !
    crypto ISAKMP policy 1
    BA 3des
    preshared authentication
    Group 2
    isakmp encryption key * address 62.aa.bb.cc
    !
    !
    Crypto ipsec transform-set esp-SHA-ESP-3DES-3des esp-sha-hmac
    !
    map SDM_CMAP_1 1 ipsec-isakmp crypto
    Description Tunnel to62.aa.bb.cc
    the value of 62.aa.bb.cc peer
    game of transformation-ESP-3DES-SHA
    PFS group2 Set
    match address 100
    !
    !
    !
    interface FastEthernet0/0
    DMZ description $ FW_OUTSIDE$
    10.10.10.254 IP address 255.255.255.0
    IP nat inside
    IP virtual-reassembly
    automatic duplex
    automatic speed
    !
    interface FastEthernet0/1
    Description $ETH - LAN$ $FW_INSIDE$
    IP 172.20.2.254 255.255.255.0
    IP access-group 100 to
    IP nat inside
    IP virtual-reassembly
    IP tcp adjust-mss 1412
    automatic duplex
    automatic speed
    !
    ATM0/0/0 interface
    no ip address
    No atm ilmi-keepalive
    !
    point-to-point interface ATM0/0/0.1
    PVC 1/32
    PPPoE-client dial-pool-number 1
    !
    !
    interface Dialer1
    Description $FW_OUTSIDE$
    the negotiated IP address
    IP mtu 1452
    NAT outside IP
    IP virtual-reassembly
    encapsulation ppp
    Dialer pool 1
    Dialer-Group 2
    PPP authentication chap callin pap
    PPP chap hostname xxxxxxx
    PPP chap password 7 xxxxxxx8
    PPP pap sent-name of user password xxxxxxx xxxxxxx 7
    map SDM_CMAP_1 crypto
    !
    IP forward-Protocol ND
    IP http server
    local IP http authentication
    IP http secure server
    !
    !
    The dns server IP
    IP nat inside source static tcp 10.10.10.1 808 interface Dialer1 80
    IP nat inside source static tcp 10.10.10.1 25 25 Dialer1 interface
    IP nat inside source overload map route SDM_RMAP_1 interface Dialer1
    IP nat inside source overload map route SDM_RMAP_2 interface Dialer1
    IP route 0.0.0.0 0.0.0.0 Dialer1 permanent
    !
    logging trap notifications
    Note category of access list 1 = 2 CCP_ACL
    access-list 1 permit 172.20.2.0 0.0.0.255
    Note access-list category 2 CCP_ACL = 2
    access-list 2 allow 10.10.10.0 0.0.0.255
    Note access-list 100 category CCP_ACL = 4
    Note access-list 100 IPSec rule
    access-list 100 permit ip 172.20.2.0 0.0.0.255 192.168.37.0 0.0.0.255
    Note CCP_ACL the access list 101 = 2 category
    Note access-list 101 IPSec rule
    access-list 101 deny ip 172.20.2.0 0.0.0.255 192.168.37.0 0.0.0.255
    access-list 101 permit ip 172.20.2.0 0.0.0.255 any
    Note access-list 102 CCP_ACL category = 2
    Note access-list 102 IPSec rule
    access-list 102 deny ip 172.20.2.0 0.0.0.255 192.168.37.0 0.0.0.255
    access-list 102 permit ip 10.10.10.0 0.0.0.255 any
    !

    !
    allowed SDM_RMAP_1 1 route map
    corresponds to the IP 101
    !
    allowed SDM_RMAP_2 1 route map
    corresponds to the IP 102
    !
    !
    control plan
    !
    !
    Line con 0
    line to 0
    line vty 0 4
    length 0
    transport input telnet ssh
    !
    Scheduler allocate 20000 1000
    NTP-Calendar Update
    NTP 172.20.2.250 Server prefer
    end

    As I mentioned previously: suspicion is much appreciated!

    Best regards

    Joerg

    Joerg,

    ASA receives not all VPN packages because IOS does not send anything.

    Try to send packets to the 1841 LAN to LAN of the ASA and see is the "sh cry ips its" on the 1841 increments the encrypted packets (there not)

    The problem seems so on the side of the router.

    I think that is a routing problem, but you only have one default gateway (no other channels on the router).

    The ACL 100 is set to encrypt the traffic between the two subnets.

    It seems that the ACL 101 is also bypassing NAT for VPN traffic.

    Follow these steps:

    Try running traffic of LAN router inside IP (source of ping 192.168.37.x 172.20.2.254) and see if the packages are not through the translation and obtaining encrypted.

    I would also like to delete 100 ACL from the inside interface on the router because it is used for the VPN. You can create an another ACL to apply to the interface.

    Federico.

  • 887VDSL2 IPSec site to site vpn does NOT use the easy vpn

    Much of community support.

    as I'm looking through the config Guide about 870 router series, only to find information about the config with eazy vpn.

    is there a classic way, about 870 Series site 2 site without eazy vpn IPSec configuration?

    Have a classic way if a tunnel? Have the 870 is not as a vpn client?

    Thank you

    Of course, here's example of Site to Site VPN configuration for your reference:

    http://www.Cisco.com/en/us/Tech/tk583/TK372/technologies_configuration_example09186a0080194650.shtml

    http://www.Cisco.com/en/us/products/HW/routers/ps221/products_configuration_example09186a008073e078.shtml

    Hope that helps.

  • IPSec site to site VPN cisco VPN client routing problem and

    Hello

    I'm really stuck with the configuration of ipsec site to site vpn (hub to spoke, multiple rays) with cisco vpn remote client access to this vpn.

    The problem is with remote access - cisco vpn client access - I can communicate with hub lan - but I need also communication of all lans speaks of the cisco vpn client.

    There are on the shelves, there is no material used cisco - routers DLINK.

    Someone told me that it is possible to use NAT to translate remote access IP-lan-HUB customers and thus allow communication - but I'm unable to set up and operate.

    Can someone help me please?

    Thank you

    Peter

    RAYS - not cisco devices / another provider

    Cisco 1841 HSEC HUB:

    crypto ISAKMP policy 1

    BA 3des

    preshared authentication

    Group 2

    ISAKMP crypto key x xx address no.-xauth

    !

    the group x crypto isakmp client configuration

    x key

    pool vpnclientpool

    ACL 190

    include-local-lan

    !

    86400 seconds, duration of life crypto ipsec security association

    Crypto ipsec transform-set esp-3des esp-sha-hmac 1cisco

    !

    Crypto-map dynamic dynmap 10

    Set transform-set 1cisco

    !

    card crypto ETH0 client authentication list userauthen

    card crypto isakmp authorization list groupauthor ETH0

    client configuration address card crypto ETH0 answer

    ETH0 1 ipsec-isakmp crypto map

    set peer x

    Set transform-set 1cisco

    PFS group2 Set

    match address 180

    card ETH0 10-isakmp ipsec crypto dynamic dynmap

    !

    !

    interface FastEthernet0/1

    Description $ES_WAN$

    card crypto ETH0

    !

    IP local pool vpnclientpool 192.168.200.100 192.168.200.150

    !

    !

    overload of IP nat inside source list LOCAL interface FastEthernet0/1

    !

    IP access-list extended LOCAL

    deny ip 192.168.7.0 0.0.0.255 192.168.1.0 0.0.0.255

    deny ip 192.168.7.0 0.0.0.255 192.168.200.0 0.0.0.255

    IP 192.168.7.0 allow 0.0.0.255 any

    !

    access-list 180 allow ip 192.168.7.0 0.0.0.255 192.168.1.0 0.0.0.255

    access-list 190 allow ip 192.168.7.0 0.0.0.255 192.168.200.0 0.0.0.255

    !

    How the DLINK has been configured for traffic between the site to site VPN subnets? You are able to add multiple remote subnets on DLINK? If you can, then you must add the pool of Client VPN subnet.

    Alternatively, if you cannot add multiple subnet on DLINK router, you can change the pool of Client VPN 192.168.6.0/24, and on the crypto ACL between the site to site VPN, you must edit the 180 existing ACL

    DE:

    access-list 180 allow ip 192.168.7.0 0.0.0.255 192.168.1.0 0.0.0.255

    access-list 180 allow ip 192.168.200.0 0.0.0.255 192.168.1.0 0.0.0.255

    TO:

    access-list 180 allow ip 192.168.6.0 0.0.1.255 192.168.1.0 0.0.0.255

    Also change the ACL 190 split tunnel:

    DE:

    access-list 190 allow ip 192.168.7.0 0.0.0.255 192.168.200.0 0.0.0.255

    access-list 190 allow ip 192.168.1.0 0.0.0.255 192.168.200.0 0.0.0.255

    TO:

    access-list 190 allow ip 192.168.7.0 0.0.0.255 192.168.6.0 0.0.0.255

    access-list 190 allow ip 192.168.1.0 0.0.0.255 192.168.6.0 0.0.0.255

    Finally, replace the remote subnet 192.168.7.0/255.255.255.0 192.168.6.0/255.255.254.0 DLINK.

    Hope that helps.

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