Private of IPSec VPN-private network between ASA and router

Hello community,

This is first time for me to configure IPSec VPN between ASA and router. I have an ASA 5540 at Headquarters and 877 router to EH Branch

Headquarters ASA summary.

Peer IP: 111.111.111.111

Local network: 10.0.0.0

Branch

Peer IP: 123.123.123.123

LAN: 192.168.1.0/24

Please can someone help me set up the vpn.

Hello

This guide covers exactly what you need:

Establishment of ASDM and SDM - http://www.netcraftsmen.net/resources/archived-articles/273.html

Tunnel VPN - ASA to the router configuration:

http://www.Cisco.com/en/us/products/ps5855/products_configuration_example09186a0080a9a7a3.shtml#ASDM

Kind regards

Jimmy

Tags: Cisco Security

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    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.

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    horodateurs service debug datetime msec
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    boot-end-marker
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    clock timezone PCTime 1
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    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
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    Authenticated MultiLink bundle-name Panel
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    object-group network phone
    VoIP phone description
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    Home 172.20.2.51
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    controller LAN 0/0/0
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    Description Tunnel to62.aa.bb.cc
    the value of 62.aa.bb.cc peer
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    !
    !
    !
    interface FastEthernet0/0
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    IP nat inside
    IP virtual-reassembly
    automatic duplex
    automatic speed
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    interface FastEthernet0/1
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    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
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    ATM0/0/0 interface
    no ip address
    No atm ilmi-keepalive
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    point-to-point interface ATM0/0/0.1
    PVC 1/32
    PPPoE-client dial-pool-number 1
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    PPP chap hostname xxxxxxx
    PPP chap password 7 xxxxxxx8
    PPP pap sent-name of user password xxxxxxx xxxxxxx 7
    map SDM_CMAP_1 crypto
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    local IP http authentication
    IP http secure server
    !
    !
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    IP nat inside source static tcp 10.10.10.1 25 25 Dialer1 interface
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    IP nat inside source overload map route SDM_RMAP_2 interface Dialer1
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    !
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    !
    allowed SDM_RMAP_2 1 route map
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    !
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    !
    !
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    line vty 0 4
    length 0
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    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.

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    1 peer IKE: 112.213.172.108
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    Generate a new key: no State: AM_TM_INIT_XAUTH_V6H

    I've attached the output of debugging of router and firewall. Hope someone can shed some light on this issue. Thanks in advance.

    Thats is correct! You must configure the network extension mode if you want to change the IP address

    Here is the guide to configure the router and ASA in network extension mode. Hope you find it useful.

    http://www.Cisco.com/en/us/Tech/tk583/TK372/technologies_configuration_example09186a0080809222.shtml#TS1

    Thank you

    Françoise

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