VPN bewtween 2 PIX - 1 behind a NAT router.

Hello

I created 2 PIX with a VPN tunnel between them and it worked. Small was during a test well before that of PIX has been shipped to the location where it has been implemented (with of course the new addresses IP etc.)

Now this PIX is placed behind a Zyxel router running NAT, and the tunnel will not simply come to the top. It is never further than the State of 'mm_sa_setup '.

I am aware that the only thing that is different from when he worked is the NAT router damn, so I should be aware of this router? I'm going nuts: 0)

Oh and btw. I use ESP-3des-sha.

Thanks in advance,

Rasmus

When you activate the NAT - T, Cisco PIX automatically opens port 4500 on all active IPSec interfaces so you should be sure that the UDP 4500 port is not blocked between two PIX.

Kind regards

Mehrdad

Tags: Cisco Security

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    2 060355 04031326 494F532D 53656 C 66 2 AND 536967 6E65642D 43657274 31312F30

    69666963 31343131 37343035 6174652D 3536301E 170 3132 31303136 32303435

    30335A 17 0D 323030 31303130 30303030 305A 3031 06035504 03132649 312F302D

    4F532D53 5369676E 656C662D 43 65727469 66696361 74652 31 34313137 65642D

    34303535 3630819F 300 D 0609 2A 864886 01050003, 818, 0030, 81890281 F70D0101

    8100F75F F1BDAD9B DE9381FD 7EAF9685 CF15A317 165B 5188 1 B 424825 9C66AA28

    C990B2D3 D69A2F0F D745DB0E 2BB4995D 73415AC4 F01B2019 C4BCF9E0 84373199

    E599B86C 17DBDCE6 47EBE0E3 8DBC90B2 9B4E217A 87F04BF7 A182501E 24381019

    A61D2C05 5404DE88 DA2A1ADC A81B7F65 C318B697 7ED69DF1 2769E4C8 F3449B33

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    88054CCA BB8CF8E8 F44BFE2C B77954E1 52301 D 06 04160414 B56EEB88 03551D0E

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    E7F40F42 8B 355015 77156C9F AAA45F9F 59CDD27F 89FE7560 F08D953B FC19FD2D

    310DA96E A5F3E83B 52D515F8 7B4C99CF 4CECC3F7 1A0D4909 BD08C373 50BB53CC

    659 4246 2CB7B79F 43D94D96 586F9103 9B4659B6 5C8DDE4F 7CC5FC68 C4AD197A 4EC322 C

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    access-list 101 permit ip 10.20.0.0 0.0.0.255 10.1.0.0 0.0.255.255

    access-list 110 deny ip 10.20.0.0 0.0.0.255 10.1.0.0 0.0.255.255

    access-list 110 permit ip 10.20.0.0 0.0.0.255 any

    public RO SNMP-server community

    !

    !

    !

    sheep allowed 10 route map

    corresponds to the IP 110

    !

    !

    !

    !

    WebVPN gateway gateway_1

    IP address X.X.216.29 port 443

    SSL trustpoint TP-self-signed-1411740556

    development

    !

    WebVPN install svc flash:/webvpn/svc.pkg

    !

    WebVPN gateway-1 context

    title 'b '.

    secondary-color white

    color of the title #CCCC66

    text-color black

    SSL authentication check all

    !

    !

    policy_1 political group

    functions compatible svc

    SVC-pool of addresses "WebVPN-Pool."

    SVC Dungeon-client-installed

    SVC split include 10.20.0.0 255.255.0.0

    Group Policy - by default-policy_1

    Gateway gateway_1

    development

    !

    !

    end

    #3: test Pix to the router:


    ITS enabled: 1

    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: 1

    1 peer IKE: X.X.21.29

    Type: user role: initiator

    Generate a new key: no State: MM_WAIT_MSG2

    > DEBUG:

    12:07:14 pix535:Oct 22 Oct 22 12:20:28 EDT: % PIX-vpn-3-713902: IP = X.X.21.29, Removing peer to peer table has not, no match
    !
    22 Oct 12:07:14 pix535: 22 Oct 12:20:28 EDT: % PIX-vpn-4-713903: IP = X.X.21.29, error: cannot delete PeerTblEntry
    #4: test the router to pix:
    LA - 2800 #sh crypto isakmp his
    IPv4 Crypto ISAKMP Security Association
    status of DST CBC State conn-id slot
    X.X.138.132 X.X.216.29 MM_KEY_EXCH 1017 ASSETS 0
    > debug
    LA - 2800 #ping 10.1.1.7 source 10.20.1.1
    Type to abort escape sequence.
    Send 5, echoes ICMP 100 bytes to 10.1.1.7, time-out is 2 seconds:
    Packet sent with a source address of 10.20.1.1
    Oct 22 16:24:33.945: ISAKMP: (0): profile of THE request is (NULL)
    22 Oct 16:24:33.945: ISAKMP: created a struct peer X.X.138.132, peer port 500
    22 Oct 16:24:33.945: ISAKMP: new created position = 0x488B25C8 peer_handle = 0 x 80000013
    22 Oct 16:24:33.945: ISAKMP: lock struct 0x488B25C8, refcount 1 to peer isakmp_initiator
    22 Oct 16:24:33.945: ISAKMP: 500 local port, remote port 500
    22 Oct 16:24:33.945: ISAKMP: set new node 0 to QM_IDLE
    22 Oct 16:24:33.945: ISAKMP: find a dup her to the tree during the isadb_insert his 487720 A 0 = call BVA
    22 Oct 16:24:33.945: ISAKMP: (0): cannot start aggressive mode, try the main mode.
    22 Oct 16:24:33.945: ISAKMP: (0): pair found pre-shared key matching 70.169.138.132
    Oct 22 16:24:33.945: ISAKMP: (0): built of NAT - T of the seller-rfc3947 ID
    Oct 22 16:24:33.945: ISAKMP: (0): built the seller-07 ID NAT - t
    Oct 22 16:24:33.945: ISAKMP: (0): built of NAT - T of the seller-03 ID
    Oct 22 16:24:33.945: ISAKMP: (0): built the seller-02 ID NAT - t
    22 Oct 16:24:33.945: ISAKMP: (0): entry = IKE_MESG_FROM_IPSEC, IKE_SA_REQ_MM
    22 Oct 16:24:33.945: ISAKMP: (0): former State = new State IKE_READY = IKE_I_MM1
    Oct 22 16:24:33.945: ISAKMP: (0): Beginner Main Mode Exchange
    Oct 22 16:24:33.945: ISAKMP: (0): package X.X.138.132 my_port 500 peer_port 500 (I) sending MM_NO_STATE
    22 Oct 16:24:33.945: ISAKMP: (0): sending a packet IPv4 IKE.
    22 Oct 16:24:34.049: ISAKMP (0:0): packet received dport 500 sport Global 500 (I) MM_NO_STATE X.X.138.132
    22 Oct 16:24:34.049: ISAKMP: (0): entry = IKE_MESG_FROM_PEER, IKE_MM_EXCH
    22 Oct 16:24:34.049: ISAKMP: (0): former State = new State IKE_I_MM1 = IKE_I_MM2
    Oct 22 16:24:34.049: ISAKMP: (0): treatment ITS payload. Message ID = 0
    Oct 22 16:24:34.049: ISAKMP: (0): load useful vendor id of treatment
    Oct 22 16:24:34.049: ISAKMP: (0): provider ID seems the unit/DPD but major incompatibility of 123
    Oct 22 16:24:34.049: ISAKMP: (0): provider ID is NAT - T v2
    Oct 22 16:24:34.049: ISAKMP: (0): load useful vendor id of treatment
    Oct 22 16:24:34.049: ISAKMP: (0): provider ID seems the unit/DPD but major incompatibility of 194
    22 Oct 16:24:34.053: ISAKMP: (0): pair found pre-shared key matching 70.169.138.132
    Oct 22 16:24:34.053: ISAKMP: (0): pre-shared key local found
    22 Oct 16:24:34.053: ISAKMP: analysis of the profiles for xauth...
    22 Oct 16:24:34.053: ISAKMP: (0): audit ISAKMP transform 1 against the policy of priority 1
    22 Oct 16:24:34.053: ISAKMP: DES-CBC encryption
    22 Oct 16:24:34.053: ISAKMP: SHA hash
    22 Oct 16:24:34.053: ISAKMP: default group 1
    22 Oct 16:24:34.053: ISAKMP: pre-shared key auth
    22 Oct 16:24:34.053: ISAKMP: type of life in seconds
    22 Oct 16:24:34.053: ISAKMP: life (IPV) 0 x 0 0 x 1 0 x 51 0x80
    22 Oct 16:24:34.053: ISAKMP: (0): atts are acceptable
    . Next payload is 0
    22 Oct 16:24:34.053: ISAKMP: (0): Acceptable atts: real life: 0
    22 Oct 16:24:34.053: ISAKMP: (0): Acceptable atts:life: 0
    22 Oct 16:24:34.053: ISAKMP: (0): fill atts in his vpi_length:4
    22 Oct 16:24:34.053: ISAKMP: (0): fill atts in his life_in_seconds:86400
    22 Oct 16:24:34.053: ISAKMP: (0): return real life: 86400
    22 Oct 16:24:34.053: ISAKMP: (0): timer life Started: 86400.
    Oct 22 16:24:34.053: ISAKMP: (0): load useful vendor id of treatment
    Oct 22 16:24:34.053: ISAKMP: (0): provider ID seems the unit/DPD but major incompatibility of 123
    Oct 22 16:24:34.053: ISAKMP: (0): provider ID is NAT - T v2
    Oct 22 16:24:34.053: ISAKMP: (0): load useful vendor id of treatment
    Oct 22 16:24:34.053: ISAKMP: (0): provider ID seems the unit/DPD but major incompatibility of 194
    22 Oct 16:24:34.053: ISAKMP: (0): entry = IKE_MESG_INTERNAL, IKE_PROCESS_MAIN_MODE
    22 Oct 16:24:34.053: ISAKMP: (0): former State = new State IKE_I_MM2 = IKE_I_MM2
    Oct 22 16:24:34.057: ISAKMP: (0): package X.X.138.132 my_port 500 peer_port 500 (I) sending MM_SA_SETUP
    22 Oct 16:24:34.057: ISAKMP: (0): sending a packet IPv4 IKE.
    22 Oct 16:24:34.057: ISAKMP: (0): entry = IKE_MESG_INTERNAL, IKE_PROCESS_COMPLETE
    22 Oct 16:24:34.057: ISAKMP: (0): former State = new State IKE_I_MM2 = IKE_I_MM3
    22 Oct 16:24:34.181: ISAKMP (0:0): packet received dport 500 sport Global 500 (I) MM_SA_SETUP X.X.138.132
    22 Oct 16:24:34.181: ISAKMP: (0): entry = IKE_MESG_FROM_PEER, IKE_MM_EXCH
    22 Oct 16:24:34.181: ISAKMP: (0): former State = new State IKE_I_MM3 = IKE_I_MM4
    Oct 22 16:24:34.181: ISAKMP: (0): processing KE payload. Message ID = 0
    Oct 22 16:24:34.217: ISAKMP: (0): processing NONCE payload. Message ID = 0
    22 Oct 16:24:34.217: ISAKMP: (0): pre-shared key found peer corresponding to X.X.138.132
    Oct 22 16:24:34.217: ISAKMP: (1018): load useful vendor id of treatment
    Oct 22 16:24:34.217: ISAKMP: (1018): provider ID is the unit
    Oct 22 16:24:34.217: ISAKMP: (1018): load useful vendor id of treatment
    Oct 22 16:24:34.217: ISAKMP: (1018): provider ID seems the unit/DPD but major incompatibility of 55
    Oct 22 16:24:34.217: ISAKMP: (1018): provider ID is XAUTH
    Oct 22 16:24:34.217: ISAKMP: (1018): load useful vendor id of treatment
    Oct 22 16:24:34.217: ISAKMP: (1018): addressing another box of IOS
    !
    Oct 22 16:24:34.221: ISAKMP: (1018): load useful vendor id of treatment
    22 Oct 16:24:34.221: ISAKMP: (1018): vendor ID seems the unit/DPD but hash mismatch
    22 Oct 16:24:34.221: ISAKMP: receives the payload type 20
    22 Oct 16:24:34.221: ISAKMP: receives the payload type 20
    22 Oct 16:24:34.221: ISAKMP: (1018): entry = IKE_MESG_INTERNAL, IKE_PROCESS_MAIN_MODE
    22 Oct 16:24:34.221: ISAKMP: (1018): former State = new State IKE_I_MM4 = IKE_I_MM4
    22 Oct 16:24:34.221: ISAKMP: (1018): send initial contact
    22 Oct 16:24:34.221: ISAKMP: (1018): ITS been pre-shared key, using id ID_IPV4_ADDR type authentication
    22 Oct 16:24:34.221: ISAKMP (0:1018): payload ID
    next payload: 8
    type: 1
    address: X.X.216.29
    Protocol: 17
    Port: 500
    Length: 12
    22 Oct 16:24:34.221: ISAKMP: (1018): the total payload length: 12
    Oct 22 16:24:34.221: ISAKMP: (1018): package X.X.138.132 my_port 500 peer_port 500 (I) sending MM_KEY_EXCH
    22 Oct 16:24:34.221: ISAKMP: (1018): sending a packet IPv4 IKE.
    22 Oct 16:24:34.225: ISAKMP: (1018): entry = IKE_MESG_INTERNAL, IKE_PROCESS_COMPLETE
    22 Oct 16:24:34.225: ISAKMP: (1018): former State = new State IKE_I_MM4 = IKE_I_MM5
    ...
    22 Oct 16:24:38.849: ISAKMP: (1017): purge the node 198554740
    22 Oct 16:24:38.849: ISAKMP: (1017): purge the node 812380002
    22 Oct 16:24:38.849: ISAKMP: (1017): purge node 773209335...
    Success rate is 0% (0/5)
    # THE-2800
    Oct 22 16:24:44.221: ISAKMP: (1018): transmit phase 1 MM_KEY_EXCH...
    22 Oct 16:24:44.221: ISAKMP (0:1018): increment the count of errors on his, try 1 5: retransmit the phase 1
    Oct 22 16:24:44.221: ISAKMP: (1018): transmit phase 1 MM_KEY_EXCH
    Oct 22 16:24:44.221: ISAKMP: (1018): package X.X.138.132 my_port 500 peer_port 500 (I) sending MM_KEY_EXCH
    22 Oct 16:24:44.221: ISAKMP: (1018): sending a packet IPv4 IKE.
    22 Oct 16:24:44.317: ISAKMP (0:1018): packet received dport 500 sport Global 500 (I) MM_KEY_EXCH X.X.138.132
    Oct 22 16:24:44.317: ISAKMP: (1018): package of phase 1 is a duplicate of a previous package.
    Oct 22 16:24:44.321: ISAKMP: (1018): retransmission jumped to the stage 1 (time elapsed since the last transmission 96)
    22 Oct 16:24:48.849: ISAKMP: (1017): serving SA., his is 469BAD60, delme is 469BAD60
    22 Oct 16:24:52.313: ISAKMP (0:1018): packet received dport 500 sport Global 500 (I) MM_KEY_EXCH X.X.138.132
    Oct 22 16:24:52.313: ISAKMP: (1018): package of phase 1 is a duplicate of a previous package.
    Oct 22 16:24:52.313: ISAKMP: (1018): retransmission due to phase 1 of retransmission
    Oct 22 16:24:52.813: ISAKMP: (1018): transmit phase 1 MM_KEY_EXCH...
    22 Oct 16:24:52.813: ISAKMP (0:1018): increment the count of errors on his, try 2 of 5: retransmit the phase 1
    Oct 22 16:24:52.813: ISAKMP: (1018): transmit phase 1 MM_KEY_EXCH
    Oct 22 16:24:52.813: ISAKMP: (1018): package X.X138.132 my_port 500 peer_port 500 (I) sending MM_KEY_EXCH
    22 Oct 16:24:52.813: ISAKMP: (1018): sending a packet IPv4 IKE.
    Oct 22 16:24:52.913: ISAKMP: (1018): package of phase 1 is a duplicate of a previous package.
    Oct 22 16:24:52.913: ISAKMP: (1018): retransmission jumped to the stage 1 (time elapsed since the last transmission of 100)
    22 Oct 16:25:00.905: ISAKMP (0:1018): packet received dport 500 sport Global 500 (I) MM_KEY_EXCH X.X.138.132
    22 Oct 16:25:00.905: ISAKMP: node set 422447177 to QM_IDLE
    ....
    22 Oct 16:25:03.941: ISAKMP: (1018): SA is still budding. New application of ipsec in the annex
    . (local 1 X. X.216.29, remote X.X.138.132)
    22 Oct 16:25:03.941: ISAKMP: error during the processing of HIS application: failed to initialize SA
    22 Oct 16:25:03.941: ISAKMP: error while processing message KMI 0, error 2.
    Oct 22 16:25:12.814: ISAKMP: (1018): transmit phase 1 MM_KEY_EXCH...
    22 Oct 16:25:12.814: ISAKMP (0:1018): increment the count of errors on his, try 4 out 5: retransmit the phase 1
    Oct 22 16:25:12.814: ISAKMP: (1018): transmit phase 1 MM_KEY_EXCH
    Oct 22 16:25:12.814: ISAKMP: (1018): package X.X.138.132 my_port 500 peer_port 500 (I) sending MM_KEY_EXCH
    22 Oct 16:25:12.814: ISAKMP: (1018): sending a packet IPv4 IKE.
    Oct 22 16:25:22.814: ISAKMP: (1018): transmit phase 1 MM_KEY_EXCH...
    22 Oct 16:25:22.814: ISAKMP (0:1018): increment the count of errors on his, try 5 of 5: retransmit the phase 1
    Oct 22 16:25:22.814: ISAKMP: (1018): transmit phase 1 MM_KEY_EXCH
    Oct 22 16:25:22.814: ISAKMP: (1018): package X.X.138.132 my_port 500 peer_port 500 (I) sending MM_KEY_EXCH
    22 Oct 16:25:22.814: ISAKMP: (1018): sending a packet IPv4 IKE.
    Oct 22 16:25:32.814: ISAKMP: (1018): transmit phase 1 MM_KEY_EXCH...
    22 Oct 16:25:32.814: ISAKMP: (1018): peer does not paranoid KeepAlive.
    ......

    22 Oct 16:25:32.814: ISAKMP: (1018): removal of reason ITS status of 'Death by retransmission P1' (I) MM_KEY_EXCH (post 70.169.138.132)

    22 Oct 16:25:32.814: ISAKMP: (1018): removal of reason ITS status of 'Death by retransmission P1' (I) MM_KEY_EXCH (post 70.169.138.132)

    22 Oct 16:25:32.814: ISAKMP: Unlocking counterpart struct 0x488B25C8 for isadb_mark_sa_deleted(), count 0

    22 Oct 16:25:32.814: ISAKMP: delete peer node by peer_reap for X.X.138.132: 488B25C8

    22 Oct 16:25:32.814: ISAKMP: (1018): error suppression node 1112432180 FALSE reason 'IKE deleted.

    22 Oct 16:25:32.814: ISAKMP: (1018): error suppression node 422447177 FALSE reason 'IKE deleted.

    22 Oct 16:25:32.814: ISAKMP: (1018): node-278980615 error suppression FALSE reason 'IKE deleted.

    22 Oct 16:25:32.814: ISAKMP: (1018): entry = IKE_MESG_INTERNAL, IKE_PHASE1_DEL

    22 Oct 16:25:32.814: ISAKMP: (1018): former State = new State IKE_I_MM5 = IKE_DEST_SA

    22 Oct 16:26:22.816: ISAKMP: (1018): purge the node 1112432180

    22 Oct 16:26:22.816: ISAKMP: (1018): purge the node 422447177

    22 Oct 16:26:22.816: ISAKMP: (1018): purge the node-278980615

    22 Oct 16:26:32.816: ISAKMP: (1018): serving SA., its A 487720, 0 =, delme = A 487720, 0

    The PIX is also used VPN client, such as the VPN Cicso 5.0 client access, works very well. Router is used as a server SSL VPN, too much work

    I know there are a lot of data here, I hope that these data may be useful for diagnostic purposes.

    All suggestions and tips are greatly appreciated.

    Sean

    Recommended action:

    On the PIX:

    no card crypto outside_map 1

    !

    crypto ISAKMP policy 5

    preshared authentication

    3des encryption

    sha hash

    Group 2

    life 86400

    !

    card crypto outside_map 10 correspondence address outside_1_cryptomap

    crypto outside_map 10 peer X.X.216.29 card game

    outside_map crypto 10 card value transform-set ESP-3DES-SHA

    life safety association set card crypto outside_map 10 28800 seconds

    card crypto outside_map 10 set security-association life kilobytes 4608000

    !

    tunnel-group X.X.216.29 type ipsec-l2l

    IPSec-attributes tunnel-Group X.X.216.29

    Pre-shared key SECRET

    !

    On the router:

    crypto ISAKMP policy 10

    preshared authentication

    Group 2

    3des encryption

    !

    Crypto ipsec transform-set esp-SHA-ESP-3DES-3des esp-sha-hmac

    output

    !

    card 10 la-2800-ipsec policy ipsec-isakmp crypto

    ipsec vpn Description policy

    defined by peer X.X.138.132

    game of transformation-ESP-3DES-SHA

    match address 101

    !

    No crypto card-2800-ipsec-policy 1

    Let me know how it goes.

    Portu.

    Please note all useful posts

    Post edited by: Javier Portuguez

  • EX90 behind a DSL router

    Hello

    I want to use EX90 to make a video call over an internet connection. The EX90 is installed behind a DSL router. The DSL router uses a public IP address while the EX90 lies in the private address space. The DSL router performs NAT

    But when I try to make a video call, the call is connected but I do not see any video and diagnostics, I see that a single audio track out of my camera.

    do we need any specific configuration on the EX90 to work in this scenario?

    I have to configure public DSL router address as address H323 NAT for that to work?

    Thank you

    Ambi

    If you had another top config before I'd start with a factory default reset.

    I would like to disable SIP:

    XConfiguration NetworkServices SIP Mode: Off

    And configure NAT:

    xConfiguration H323 NAT Mode: auto

    xConfiguration H323 NAT address: "88.66.55.33."

    xConfiguration H323 profile 1 PortAllocation: static

    As you say, 88.66.55.33 ports transmits to 192.168.1.10

    These are the required ports:

    For direct H.323 calls, the ports used are:

    • Q.931 call Setup: Port 1720 (TCP)
    • H.245 (static): port 5555-6555 range (TCP)

    or if you want to use dynamic: H.245 (Dynamic): range of ports (TCP) 11000-20999

    • Media (Audio/video/data/FECC) *: port 2326-2485 range (UDP)

    * Configurable by "Range of Ports RTP Start" and "Stop RTP Ports range".

    Please remember useful frequency responses and identify useful or correct answers.

  • Nat router firewall

    I have connected a firewall to a linksys BEFSR41 router.

    I put the BEF on a separate subnet

    Re: static 192.168.1.2 (on the same subnet as firewall)

    Gateway: 192.168.1.1 (firewall inside address)

    DNS: 192.168.1.1

    LAN:

    192.168.2.1

    NAT is enabled.

    I have the ethernet cable between the firewall connected to the WAN port on the BEF

    It works very well to go through the firewall to the internet (which also has nat;-I'm not sure how it works with the two nats.)  )

    Problem: If I disable NAT on the BEF I can't through the internet.

    The question: is there a way to configure the BEF with NAT disabled and still get to the internet?

    I tried different settings for the WAN on the BEF (in addition to the above) but you have not hit to the right pair.

    Any suggestion would be appreciated.

    Hugh

    If you connect a second external via a router to a different LAN port (main) settings NAT is actually irrelevant. I don't know why talk of various FAQ to disable NAT (router mode switch). It makes not a difference. NAT applies only to packets that passes through the component routing, i.e. travel side LAN to the WAN port or back up. Thus, it is not relevant for a LAN - LAN configuration.

    The default setting for a normal router is active NAT because you use IP private addresses inside the local network that must be mapped to the public IP address on the WAN port. That's what NAT. Internally, you have private IP addresses. In the internet, we see only the public IP address.

    It is true that with active NAT side LAN is inaccessible from the side WAN (with the exception of redirects to port etc.). Is only a precondition not to do a side fully accessible side LAN WAN turn off NAT. That NAT is now disabled the LAN IP addresses are routed to the side WAN. This means that the side WAN must understand and also forward these IP addresses correctly. In your case, with NAT disabled the computers and router WAN side need to know where to route the packets 192.168.2. *. If you do not set a road for 192.168.2.0/255.255.255.0 on the main router all the packages of 192.168.2. * will be sent to the default gateway, which is in the internet where they are quickly eliminated.

    To make a computer connected to the accessible BEF from the internet you have to options:

    1. you can expose some ports through port forwarding and NAT enabled on the BEF. You must pass these ports on the firewall and the BEF. The firewall forwards to the WAN IP 192.168.1.2 the BEF. The BEF transmits to the address of the LAN computer, for example 192.168.2.50.

    2. If you want to disable the NAT on the BEF, you must configure a static route on the firewall to route 192.168.2.0/255.255.255.0 Gateway 192.168.1.2. In addition, you may need to adjust the NAT rules to include 192.168.2.0/255.255.255.0 for NAT (NAT rules define which IP addresses are mapped to the public IP address and which not).

    If you want the computer to be accessible from the internet, you still have to implement the translation of port on the firewall (the firewall because no NAT and thus makes the side LAN firewall inaccessible from the internet). The firewall is not possible: some barrier-lights/routers allow you to set up port forwarding to arbitrary IP addresses and their own LAN IP subnet, i.e. the firewall might not only to transmit not 192.168.1. * but * 192.168.2.

    Perhaps you could explain why you must have some computers on a different subnet.

  • Using Cisco Client to site VPN on a behind a NAT ASA 5520

    I apologize if this has been asked and we answered in the forums.  I looked, and while I found a large number of entries that were dancing all around this question, I never found nothing which addressed this specific issue.   We currently use an ASA 5520 as the head end of a relatively large customer to site IPSEC VPN (approximately 240 users, not consecutively).   This ASA is currently sitting behind a Checkpoint firewall with a real publicly addressable IP address on its public interface.  All of our customers use the legacy Cisco VPN (not the one anyconnect) client.  We plan to a few controllers F5 link set up between ISPS and firewalls.   For VPN connectivity F5 recommends that we NAT IP address (called a broad IP) to point back to a private IP address on the ASA and F5.  My question is, will this work?   I've always heard say that the head of line needed to have a public IP address on this subject because this is what will be placed in packages for the client to respond to.

    For further information, here's what we have now and what we are invited to attend.

    Current

    ISP - router - firewall-fire - ASA (public IP address as endpoint)

    Proposed

    ISP - router - F5 (public IP address as endpoint using a NAT to ASA) - Firewall - ASA (10.X.X.X as its external interface)

    Proposed alternative

    ISP - router - F5 (public IP address as endpoint using a NAT to ASA) - ASA (10.X.X.X as its external interface)

    All thoughts at this moment would be greatly appreciated.   Thank you!

    Hello

    If there is a static NAT one by one on F5 to the external interface of the ASA, then I don't think they would be any problems.
    Because when the client will attempt to connect to IKE to the translated public IP, F5 will redirect the request to ASA outside interface that is configured for the VPN.

    In addition, to ensure the udp500, 4500 and esp is allowed and then you should be good to go.

    HTH

    Concerning
    Mohit

  • PAT/NAT and VPN through a PIX

    "PPTP through the PIX with Port address translation (PAT) does not work because there is no concept of ports in GRE"-this is an excerpt from a config PIX version 6.2 and below.

    1. how this problem has been fixed in 6.3? GRE is encapsulated in udp or tcp to use ports to follow the connection?

    2. is it "fixup protocol esp-ike" use the same technology - the source port created by the IKE protocol? -ISAKMP cannot be enabled when you use this command

    3. What is "isakmp nat-traversal? How is this different from fixup protocol esp-ike"

    Thank you

    RJ

    1. when the PIX sees outgoing PPTP (TCP 1723 port) packets it now opens holes for them to return, as well as opening a hole for the GRE packets, it has never done this before. The PPTP TCP packets can be PAT would be fine because they are TCP packets. GRE packets, I believe, are followed by the id field only tunnel in the package.

    2. we use the source port of the ISAKMP packet for ESP packets as well. The current limitation is that if you have this option, you cannot use the PIX to close the IPSec sessions, so you can not turn on ISAKMP any interface. You can also have only a single IPSec client internal to use this feature.

    3 NAT - T is a new standard for IPSec to work through a NAT device peers, because they detect changes of address during the negotiation of tunnel and automatically encapsulate packets in UDP 4500. This market allows the PIX and the other device (if it supports it) to automatically detect a NAT/PAT device between them. This differs from the "esp - ike correction '' that the PIX ends not in fact the IPSec tunnel with esp - ike, but it is the endpoint in nat - t.

  • PIX - Access behind full PAT

    Hello

    Is it possible to have full access to the machine within the network (behind PIX using PAT) from outside? Not only a specific port, but all the ports for all machines within the network? If so, please guide me.

    Thank you

    Iltiaz

    No, by its very definition is PAT * Port * address translation. If you need to have full access to a mailbox, you need to set up a static NAT 1 to 1 with a command

  • VPN client to PIX - no bytes received on client

    I have a PIX with 6.3 (4) and the Client VPN 5.0.06.0110.  I can establish a tunnel, but can not pass traffic beyond the PIX to the customer network.  I ping the inside of the PIX, I believe that the tunnel is very well, but maybe the ACL is bad?  Once the tunnel is established, under details statistics/Tunnel the bytes sent back, but the received bytes remaining to 0.

    If someone would like to chime, I'd appreciate it.

    pixfirewall # sh conf
    : Saved
    : Written by enable_15 at 14:45:50.611 UTC Tuesday, December 15, 2009
    6.3 (4) version PIX
    interface ethernet0 car
    interface ethernet1 100full
    ethernet0 nameif outside security0
    nameif ethernet1 inside the security100
    enable the encrypted password xxxxx
    XXXXX encrypted passwd
    pixfirewall hostname
    domain xxx.com
    fixup protocol dns-maximum length 4096
    fixup protocol ftp 21
    fixup protocol h323 h225 1720
    fixup protocol h323 ras 1718-1719
    fixup protocol http 80
    fixup protocol they 389
    fixup protocol rsh 514
    fixup protocol rtsp 554
    fixup protocol sip 5060
    fixup protocol sip udp 5060
    fixup protocol 2000 skinny
    fixup protocol smtp 25
    fixup protocol sqlnet 1521
    fixup protocol tftp 69
    names of
    access-list 101 permit ip 192.168.27.0 255.255.255.0 10.10.10.0 255.255.255.0
    access-list 102 permit ip 192.168.27.0 255.255.255.0 10.10.10.0 255.255.255.0
    pager lines 24
    ICMP allow all outside
    ICMP allow any inside
    Outside 1500 MTU
    Within 1500 MTU
    IP address outside 209.xxx.xxx.248 255.255.255.255
    IP address inside 192.168.27.2 255.255.255.0
    alarm action IP verification of information
    alarm action attack IP audit
    IP local pool ippool 10.10.10.1 - 10.10.10.254
    PDM logging 100 information
    history of PDM activate
    ARP timeout 14400
    NAT (inside) - 0 102 access list
    Route outside 0.0.0.0 0.0.0.0 209.xxx.xxx.1 1
    Timeout xlate 0:05:00
    Timeout conn 01:00 half-closed 0:10:00 udp 0: CPP 02:00 0:10:00 01:00 h225
    H323 timeout 0:05:00 mgcp 0: sip from 05:00 0:30:00 sip_media 0:02:00
    Timeout, uauth 0:05:00 absolute
    GANYMEDE + Protocol Ganymede + AAA-server
    AAA-server GANYMEDE + 3 max-failed-attempts
    AAA-server GANYMEDE + deadtime 10
    RADIUS Protocol RADIUS AAA server
    AAA-server RADIUS 3 max-failed-attempts
    AAA-RADIUS deadtime 10 Server
    AAA-server local LOCAL Protocol
    Enable http server
    No snmp server location
    No snmp Server contact
    SNMP-Server Community public
    No trap to activate snmp Server
    enable floodguard
    Permitted connection ipsec sysopt
    Crypto ipsec transform-set esp - esp-md5-hmac gvnset
    Crypto-map dynamic dynmap 10 transform-set gvnset
    gvnmap 10 card crypto ipsec-isakmp dynamic dynmap
    gvnmap interface card crypto outside
    ISAKMP allows outside
    ISAKMP key * address xxx.xxx.142.105 netmask 255.255.255.255
    ISAKMP identity address
    ISAKMP nat-traversal 20
    part of pre authentication ISAKMP policy 9
    encryption of ISAKMP policy 9
    ISAKMP policy 9 md5 hash
    9 2 ISAKMP policy group
    ISAKMP policy 9 life 28800
    vpngroup address ippool pool gvnclient
    vpngroup dns 192.168.27.1 Server gvnclient
    vpngroup gvnclient wins server - 192.168.27.1
    vpngroup gvnclient by default-domain xxx.com
    vpngroup split tunnel 101 gvnclient
    vpngroup idle 1800 gvnclient-time
    vpngroup password gvnclient *.
    Telnet 192.168.27.0 255.255.255.0 inside
    Telnet timeout 15
    SSH timeout 60
    management-access inside
    Console timeout 0
    Terminal width 80
    Cryptochecksum:xxx
    pixfirewall #.

    Servers on the 192.168.27.0 network probably need a route that points the 10.10.10.0/24 network to the PIX. It is possible that your customer VPN traffic if he imagines, but the other end does not know how to get back.

  • Problems with VPN between Cisco PIX 6.3.3 and VPN 3000 Concentrator

    Hi guys,.

    I hope this is the right place and that someone has encountered this before I don't have much hair left to offset - I'm trying to set up a tunnel between our Pix 6.3.3 performer and a customer using a VPN3000.

    The customer wants us to be able to do checkups on a device without allowing anything to of our range of addresses network side private, just one public IP address.  We currently run a VPN to our recovery site to allow off-site replication, but the ACL on the other end of this VPN * does * allow the configuration that we had for our private network side, so traffic was not useful at that.  Here is a screenshot of what I tried:

    ethernet0 nameif outside security0
    nameif ethernet1 inside the security100
    nameif ethernet2 dmz1 security50

    name 172.16.1.48 Cust_DVR1

    permit 192.168.1.0 ip access list inside_outbound_nat0_acl 255.255.255.0 255.255.255.255 Cust_DVR1

    permit 192.168.1.0 ip access list outside_cryptomap_30 255.255.255.0 255.255.255.255 Cust_DVR1

    IP outside X.Y.Z.227 255.255.255.224
    IP address inside 192.168.1.1 255.255.255.0

    location of PDM Cust_DVR1 255.255.255.255 outside

    Global 1 X.Y.Z.230 (outside)
    Global (dmz1) 1 interface
    NAT (inside) 0-list of access inside_outbound_nat0_acl
    NAT (inside) 1 192.168.1.0 255.255.255.0 0 0

    Crypto ipsec transform-set ESP-3DES-MD5-esp-3des esp-md5-hmac

    outside_map 30 ipsec-isakmp crypto map

    outside_map 30 peer A.B.C.D crypto card game<--- (public="" ip="" of="" customer="">

    card crypto outside_map 30 match address centura_map_30

    card crypto outside_map 30 the transform-set ESP-3DES-MD5 value

    outside_map interface card crypto outside

    ISAKMP key * A.B.C.D netmask 255.255.255.255 No.-xauth No. config-mode

    part of pre authentication ISAKMP policy 30

    ISAKMP policy 30 3des encryption

    ISAKMP policy 30 md5 hash

    30 2 ISAKMP policy group

    ISAKMP duration strategy of life 30 86400

    My hope is that anything on the 192.168.1.0/24 would be able to get out of the external interface as our only our public IP addresses (i.e. X.Y.Z.230), but the traffic they see on the other end is coming from the 192.168.1.0 network.  I tried to remove the line inside_outbound_nat0_acl think she would use then the world but still do not have a bit of luck and the only difference I see on Kiwi Syslogd is that the src_proxy changes to 0.0.0.0 where is shows the IP address of my private side (for the purposes of the config above let's call it 192.168.1.135).

    THANKS MUCH FOR ANY HELP!

    -Mario

    Hello

    For example, you can NAT your internal via the tunnel network traffic when you go to this customer.

    In this way, they will see your unique internal network as an IP address.

    Let's say, rather than them seeing your internal 192.168.1.0/24, eelle will see your traffic like X.Y.Z.227

    Is this what you need?

    Federico.

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