AnyConnect SSL VPN through IPSEC Tunnel

Everyone was able to set up and connect using Cisco anyconnect vpn ssl on a Cisco IPSEC's tunnel. I used this in the past from a Windows XP system in the past but its not working now. None of my users are able to cooect using the Anyconnect on IPSEC. IPSEC on its own works very well.

The Anyconnect is also able to create the connection to its ASA firewall however its not able to route all traffic through. Do you have any suggestions?

Thanks for the update.

Tags: Cisco Security

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    Hi guys,.

    I am currently ut setting for the first time on a Cisco ASA 5505 Cisco AnyConnect SSL VPN.

    I enclose my topology.

    I ran the wizard of the ASDM on the ASA2 I want to use for my VPN connections.

    Everything works fine except that I can't access any internal computer servers on my network.

    I do a specific configuration because my servers have a different default gateway of the ASA that I use for my VPN?

    I have since the ASA2 the 192.168.10.0 network.

    my remote ip address of the pool is 10.0.0.1-10.0.0.10/24

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    tunnel of splitting allowed access list standard 192.168.10.0 255.255.255.0

    network of the NETWORK_OBJ_10.0.0.0 object

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    Thanks in advance!

    Hello

    The unit behind your ASAs on the internal LAN should really be a router switch or L3 and not a basic L2 switch.

    You now have an asymmetric routing on your network, and this is the reason why the connection of the VPN device will not work.

    The problem comes from the fact that internal devices use the ASA1 for the default gateway. When trying to connect to the VPN Client, the following happens

    • Client VPN armed sends TCP SYN that happens by the VPN with the ASA2
    • ASA2 passes the TCP SYN to the server
    • Server responds with TCP SYN ACK for the VPN Client and sends this information to the ASA1 as the destination host is in another network (vpn pool)
    • ASA1 sees the TCP SYN ACK, but never saw the TCP SYN so he abandoned the connection.

    To work around the problem, you need to essentially configure TCP State Bypass on the ASA1 although I wouldn't really say that, but rather to change the configuration of the network so that traffic makes this way to start.

    An option, even if not the best, would be to set the LAN of the ASA2 to ASA1 on some physical ports and set up a new network connection between them (not the same 192.168.10.x/yy). In this way the ASA1 would see the entire conversation between servers and VPN Clients and there are no problems with the flow of traffic.

    But as I said it probably still isn't the best solution, but in my opinion better than having recourse to special configurations ASA1.

    There could be a 'special' configuration on the ASA2 that you could use to make the Client VPN connections operate in their current configuration, without changing anything in the physical topology.

    You can change the NAT for VPN Clients configuration so that the VPN ALL users would actually PATed to 192.168.10.4 IP address when they connect to your internal network. Given that the server would see the connection coming from the same network segment, they would know to forward traffic back with the ASA2 rather than ASA1 like her today.

    If this is not an ideal solution.

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    Hello

    I'm looking for an answer is it possible such configuration:

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    I don't know if two-factor authentication is user/password from Active Directory + OTP by Symantec VIP there is no problem, because you can send the user + pass with Radius, but with certificates I do not really understand who will check the validity of the certificate, which certificate, we will send you to the RADIUS for the validation server and how the configuration of the point of view of ASA will look like.

    Thank you very much for the help!

    Hi Alex,

    I don't see a problem with having certificate + token to connect to the VPN. Certificate authentication must be performed on the SAA, see an example below:

    https://supportforums.Cisco.com/blog/152941/AnyConnect-certificate-based-authentication

    Authentication token can be specified as primary/secondary (authentication SDI) on the SAA, an example below:

    http://www.Cisco.com/c/en/us/TD/docs/security/vpn_client/AnyConnect/anyconnect31/Administration/Guide/anyconnectadmin31/ac11authenticate.html#pgfId-1060345

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    match default-inspection-traffic
    class-map inspection_default
    match default-inspection-traffic
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    !
    type of policy-card inspect dns preset_dns_map
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    maximum message length automatic of customer
    message-length maximum 512
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    icmp category
    inspect the icmp
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    inspect h323 h225
    inspect the h323 ras
    inspect the rsh
    inspect the rtsp
    inspect esmtp
    inspect sqlnet
    inspect the skinny
    inspect sunrpc
    inspect xdmcp
    inspect the sip
    inspect the netbios
    inspect the tftp
    Review the ip options
    inspect the icmp
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    global service-policy global_policy
    service-policy icmp_policy outside interface
    context of prompt hostname
    no remote anonymous reporting call
    Cryptochecksum:261228832f3b57983bcc2b4ed5a8a9d0
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    Can you confirm that this is correct, your diagram shows your IP address public on ASA as 30 while you have assinged on 'outside' interface like 29?

  • ACL and anyconnect ssl vpn

    Hello world

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    Rick

  • Unable to Ping hosts through IPSec Tunnel

    I have a configuration of lab home with a PIX 515 running code 8.03.  I've made several changes over the last week and now when I finish a VPN connection to the external interface, I'm unable to hit all internal resources.  My VPN connection comes from a 10.22.254.0/24 trying to knock the internal nodes to 10.22.1.0/24, see below.  When I finish a VPN connection with the inside interface works, so I guess that I'm dealing with a NAT problem?   I have not idea why Phase 9 is a failure:-------.  Any help would be great!

    -------

    IP 10.22.254.0 allow Access-list extended sheep 255.255.255.0 10.22.1.0 255.255.255.0

    NAT (inside) 0 access-list sheep

    -------

    Global 1 interface (outside)

    -------

    access-list extended split allow ip 10.22.1.0 255.255.255.0 10.22.254.0 255.255.255.0

    -------

    Packet-trace entry inside tcp 10.22.1.15 1025 10.22.254.15 3389 detailed

    Phase: 1

    Type: FLOW-SEARCH

    Subtype:

    Result: ALLOW

    Config:

    Additional information:

    Not found no corresponding stream, creating a new stream

    Phase: 2

    Type:-ROUTE SEARCH

    Subtype: entry

    Result: ALLOW

    Config:

    Additional information:

    in 0.0.0.0 0.0.0.0 outdoors

    Phase: 3

    Type: IP-OPTIONS

    Subtype:

    Result: ALLOW

    Config:

    Additional information:

    Direct flow from returns search rule:

    ID = 0x2bb3450, priority = 0, sector = option-ip-enabled, deny = true

    hits = 17005, user_data = 0 x 0, cs_id = 0 x 0, reverse, flags = 0 x 0 = 0 protocol

    SRC ip = 0.0.0.0 mask 0.0.0.0, port = 0 =

    DST ip = 0.0.0.0 mask 0.0.0.0, port = 0 =

    Phase: 4

    Type: VPN

    Subtype: ipsec-tunnel-flow

    Result: ALLOW

    Config:

    Additional information:

    Direct flow from returns search rule:

    ID = 0x304ae48, priority = 12, area = ipsec-tunnel-flow, deny = true

    hits = 17005, user_data = 0 x 0, cs_id = 0 x 0, flags = 0 x 0 = 0 protocol

    SRC ip = 0.0.0.0 mask 0.0.0.0, port = 0 =

    DST ip = 0.0.0.0 mask 0.0.0.0, port = 0 =

    Phase: 5

    Type: NAT-FREE

    Subtype:

    Result: ALLOW

    Config:

    NAT (inside) 0 access-list sheep

    NAT-control

    is the intellectual property inside 10.22.1.0 outside 10.22.254.0 255.255.255.0 255.255.255.0

    Exempt from NAT

    translate_hits = 6, untranslate_hits = 5

    Additional information:

    Direct flow from returns search rule:

    ID = 0x2be2a00, priority = 6, free = area of nat, deny = false

    Hits = 5, user_data is 0x2be2960, cs_id = 0 x 0, use_real_addr, flags = 0 x 0 = 0 protocol

    SRC ip = 10.22.1.0, mask is 255.255.255.0, port = 0

    DST ip = 10.22.254.0, mask is 255.255.255.0, port = 0

    Phase: 6

    Type: NAT

    Subtype: host-limits

    Result: ALLOW

    Config:

    static (inside, DMZ) 10.22.1.0 10.22.1.0 netmask 255.255.255.0

    NAT-control

    is the intellectual property inside 10.22.1.0 255.255.255.0 DMZ all

    static translation at 10.22.1.0

    translate_hits = 10, untranslate_hits = 0

    Additional information:

    Direct flow from returns search rule:

    ID = 0x2d52800, priority = 5, area = host, deny = false

    hits = 21654, user_data = 0x2d51dc8, cs_id = 0 x 0, reverse, flags = 0 x 0 = 0 protocol

    SRC ip = 10.22.1.0, mask is 255.255.255.0, port = 0

    DST ip = 0.0.0.0 mask 0.0.0.0, port = 0 =

    Phase: 7

    Type: NAT

    Subtype:

    Result: ALLOW

    Config:

    NAT (inside) 1 0.0.0.0 0.0.0.0

    NAT-control

    is the intellectual property inside everything outside of any

    dynamic translation of hen 1 (192.168.20.20 [Interface PAT])

    translate_hits = 2909, untranslate_hits = 9

    Additional information:

    Direct flow from returns search rule:

    ID = 0x2d4a7d0, priority = 1, sector = nat, deny = false

    hits = 16973, user_data = 0x2d4a730, cs_id = 0 x 0, flags = 0 x 0 = 0 protocol

    SRC ip = 0.0.0.0 mask 0.0.0.0, port = 0 =

    DST ip = 0.0.0.0 mask 0.0.0.0, port = 0 =

    Phase: 8

    Type: VPN

    Subtype: encrypt

    Result: ALLOW

    Config:

    Additional information:

    Direct flow from returns search rule:

    ID = 0 x 3328000, priority = 70, domain = encrypt, deny = false

    hits = 0, user_data is 0x1efa0cc, cs_id = 0 x 0, reverse, flags = 0 x 0 = 0 protocol

    SRC ip = 10.22.1.0, mask is 255.255.255.0, port = 0

    DST ip = 10.0.0.0, mask is 255.0.0.0, port = 0

    Phase: 9

    Type: ACCESS-LIST

    Subtype: ipsec-user

    Result: DECLINE

    Config:

    Additional information:

    Direct flow from returns search rule:

    ID = 0x3329a48, priority = 69, domain = ipsec - user, deny = true

    Hits = 37, user_data = 0 x 0, cs_id = 0 x 0, flags = 0 x 0 = 0 protocol

    SRC ip = 0.0.0.0 mask 0.0.0.0, port = 0 =

    DST ip = 10.0.0.0, mask is 255.0.0.0, port = 0

    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: drop

    Drop-reason: flow (acl-drop) is denied by the configured rule

    No, the sheep ACL requires that defining the internal network traffic to the

    Pool VPN.  You must remove the other entries.

    Delete:

    allowed to Access-list sheep line 8 extended ip 10.22.254.0 255.255.255.0 DM_INLINE_NETWORK_18 object-group
    allowed to Access-list sheep line 8 extended ip 10.22.254.0 255.255.255.0 10.22.1.0 255.255.255.0

  • Is there one GUI, other than Assistant Deputy Ministers, and the CSM for test site vpn to ipsec tunnels on an asa5505/asa5510?

    Is there a GUI, other than the Assistant Deputy Ministers and the Security Manager cisco IPSec of Cisco ASA5505/5510 test site to vpn tunnels. I usually go through the steps listed in here in the link below in the terminal window, but it sucks when you have several tunnels to keep abreast of.

    http://www.nwdump.com/troubleshooting-IPSec-VPN-on-ASA/

    I would have preferred one that works with Freebsd or LInux, as the cisco security manager CSM v4.1 is limited to only current running on windows server 2008 ent.

    Thank you

    Jason

    No, for troubleshooting the best way is to use the CLI that will give you debug output on where it is lacking.

    For configuration, outside the CLI, ASDM and CSM, unfortunately there is no other tool that works on Linux/Freebsd because it is more specific orders of the ASA and only limited to the CLI, ASDM, or CSM.

  • Difference between webVPN, SSL vpn and ipsec client

    Hello

    We just bought an ASA5510 and I am trying to understand the difference of the possibilities mentioned VPN. Can anyone describe the differences and use scenarios of all types of remote access vpn of the asa?

    Thanks in advance.

    Rgds,

    Rasmus

    Hi Rasmus,

    They use different SSH and IPSEC protocols, and there is also of course in terms of security.

    SSL is easy to deploy than ipsec. Imagine that you have 200 + users and to connect to the vpn, you must give them the pcf file and client software, which is not required in the case of SSL.

    Kind regards

    ~ JG

    Please note if assistance

  • Making the NAT for VPN through L2L tunnel clients

    Hi.I has the following situation in my network. We need for users who log on our site with the VPN clients to connect to another site via a tunnel L2L. The problem is that I need NAT addresses from the pool of VPN client in another beach before going on the L2L tunnel because on the other side, we have duplication of networks.

    I tried to do NAT with little success as follows:

    ACL for pool NAT of VPN:

    Extended list ip 192.168.253.0 access TEST allow 255.255.255.0 192.168.0.0 255.255.255.0

    Extended list ip 192.168.253.0 access TEST allow 255.255.255.0 192.168.5.0 255.255.255.0

    NAT:

    Global 172.20.105.1 - 172.20.105.254 15 (outdoor)

    NAT (inside) 15 TEST access-list

    CRYPTO ACL:

    allowed ro access list extended LAN ip 255.255.0.0 192.168.0.0 255.255.255.0

    allowed ro access list extended LAN ip 255.255.0.0 192.168.5.0 255.255.255.0

    IP 172.20.105.0 RO allow extended access list 255.255.255.0 192.168.0.0 255.255.255.0

    IP 172.20.105.0 RO allow extended access list 255.255.255.0 192.168.5.0 255.255.255.0

    permit same-security-traffic intra-interface

    Am I missing something here? Something like this is possible at all?

    Thanks in advance for any help.

    We use the ASA 5510 with software version 8.0 (3) 6.

    You need nat to the outside, not the inside.

    NAT (outside) 15 TEST access-list

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