Cisco AnyConnect SSL VPN

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

config (I've included what, in my view, is necessary, please let me know if you need to see more):

ASA 2.0000 Version 8

Sysopt connection permit VPN

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

10.0.0.0 subnet 255.255.255.0

NAT (inside, outside) static source any any static destination NETWORK_OBJ_10.0.0.0 NETWORK_OBJ_10.0.0.0 non-proxy-arp-search to itinerary

internal GroupPolicy_vpn group strategy

attributes of Group Policy GroupPolicy_vpn

value of 192.168.10.20 WINS server

value of server DNS 192.168.10.15

client ssl-VPN-tunnel-Protocol ikev2

Split-tunnel-policy tunnelspecified

Split-tunnel-network-list value split tunnel

domain.local value by default-field

WebVPN

User PROFILE of value type profiles AnyConnect

type tunnel-group tunnel_vpn remote access

tunnel-group tunnel_vpn General-attributes

address ra_vpn_pool pool

Group Policy - by default-GroupPolicy_vpn

tunnel-group tunnel_vpn webvpn-attributes

activation of the Group tunnel_vpn alias

!

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.

No source (indoor, outdoor) nat static any any static destination NETWORK_OBJ_10.0.0.0 NETWORK_OBJ_10.0.0.0 non-proxy-arp-search to itinerary

the object of the LAN network

192.168.10.0 subnet 255.255.255.0

NAT (exterior, Interior) 1 dynamic source NETWORK_OBJ_10.0.0.0 destination static LAN LAN interface

Hope this helps

-Jouni

Tags: Cisco Security

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    WebVPN gateway SSLVPN
    router host name
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    SSL trustpoint TP-self-signed-1873082433
    development
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    title "Blah Blah"
    SSL authentication check all
    !
    Login-message "enter the magic words...". »
    !
    port-forward "PortForwardList."
    description of remote-port 3389 to remote-server '10.0.1.3' local-port 33389 "RDP".
    !
    SSL-policy strategy group
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    development

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

    I tried:

    Activation of SSL 2.0 in Internet Explorer

    * Adding the site to websites of trusted in Internet Explorer

    * Add to the list of sites allowed to use Cookies

    At a loss to understand this.  Has anyone encountered this before?  Whereas Cisco's Web site shows an example usage of IE (http://www.cisco.com/en/US/products/ps6496/products_configuration_example09186a008072aa61.shtml), surely, it should work in IE you would think?

    Thank you

    Hello

    I would check out where exactly it is a failure, either the connection ssl itself or something after that. The best way to do that is executed a wireshark capture when you try to access the page using IE. You can compare this with that with Mozilla too just to confirm that ssl works fine.

    Also you can try with different SSL encryption algorithms as a difference between the browsers is the encryption they use. 3DES is expected to be a good option to try.

  • Cisco 1941 ssl vpn license

    Anyone know if the FL-WEBVPN-10-K9 will work on my 1941 or is it only for the older gen SRI?

    My router has already installed security license, but I think I need a VPN SSL to SSL license.

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    1941 supports up to 75 users of ssl vpn.
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  • AnyConnect ssl vpn using digital certificates

    people

    I have an asa 5540 (8.4) used to stop vpn ssl connections

    the device is used as a local certification authority and issued certificates to remote users and these are then used as part of the authentication process

    I now have an obligation to replace the self-signed certificate and buy a third-party certificate, for example verisign etc.

    can someone point me to a guide for the performance for this

    can I still use the asa to generate certificates for guests to use as part of the authentication process

    Thanks to anyone taking the time to answer or two reading this

    greatly appreciated

    http://www.Cisco.com/en/us/products/ps6120/products_configuration_example09186a00808b3cff.shtml

    is the guide to install 3rd party cert.

    The local process of CA is independent of user certificate to authenticate the ASA, in fact, if you look at the CERT gives users that they are provided by the CA of the ASA and unsigned by cert used for authentication.

    Take care of is not to remove too much of RSA keys ;-)

  • IPHONE 4.0 with Anyconnect ssl vpn client

    Hello

    It does anyone know how to configure an Iphone 4.0 with client anyconnect with certificate-based authentication?

    I just found that is supported, but I have not found any documentation about it.

    Hello

    The client anyconnect for iPhone has not yet been published, and so now you can configure.

    Kind regards

    Assia

  • Cisco ASA (SSL VPN)-based user portal?

    Hi all

    I am looking for a solution, different portals (WEBVPN) that can be assigned to different users.

    For example:

    -'test1' user and see the portal "-1".

    -user "test2", "test3" connect and see the portal "-2".

    I know, it can be done with the alias for each portal entry, but I want a transparent solution for the user (such as Juniper SA2000).
    In addition, it should be possible to authenticate via RADIUS (no local authentication on the SAA).

    Who did such a set upward?

    Thank you

    Norbert

    Hello

    The attribute 25 (it's called 'Class') and set its value to UO = MyVPNGroupPolicy where MyVPNGroupPolicy is the name of your group strategy in the SAA.

    I hope this helps.

    Kind regards

    Anisha

    P.S.: Please mark this thread as answered if you feel that your query is resolved. Note the useful messages.

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