Routing of traffic for a specific user through vpn Ipsec
I want to route traffic to a specific host on the internet through our external interface (for example, 7.7.7.0/27) instead of the internet connection of the client (for example 9.9.9.9).
I have already added 9.9.9.9 in the split dns acl so that the road is inserted on the client workstation and a default route on the external interface is defined as follows:
CISCOASA # run HS | I have the route outside
Route outside 0.0.0.0 0.0.0.0 7.7.7.30 1
Nat config
object obj-InsideNetworks network
NAT 7.7.7.3 Dynamics (indoor, outdoor)
No nat
NAT (inside, all) source static obj-InsideNetworks obj-InsideNetworks destination DEST-Interior-SHEEP inside-DEST-SHEEP no-proxy-arp static
object obj-InsideNetworks network
range 10.0.1.0 10.0.255.255
object-group network inside-DEST-SHEEP
network-object 10.0.3.0 255.255.255.0
object-network 10.0.2.0 255.255.255.0
object-network 10.10.10.0 255.255.255.0
object-network 10.0.4.0 255.255.255.128
The static IP assigned to the vpn client is 10.0.4.150 if it is not the scope of the Interior-DEST-SHEEP. If again I traceroute
9.9.9.9 when connected, I get the first bond 7.7.7.1 and it stops there.
Would appreciate any help on this.
Hello
If you try to NAT the VPN user traffic when it connects to the Internet through the ASA NAT configuration so that the user should then be
network of the VPN-CLIENT-PAT object
subnet 10.0.4.128 255.255.255.128
dynamics of NAT (outdoors, outdoor)
Insert the dynamic PAT public IP in the above configuration. You can either use "interface" parameter to use the public IP address of ASAs or insert a detached public IP address that can be used. I guess the Pool of VPN uses the 10.0.4.128/25 subnet.
You must also make sure you have the following configuration enabled
permit same-security-traffic intra-interface
You can check with
See the race same-security-traffic
Note that there is another similar parameter that ends in "inter-interface" who used to work for this situation.
Hope this helps
Let me know if make you it work
-Jouni
Tags: Cisco Security
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access-list L2L-VPN-CRYPTO-SITEA ip 192.168.3.0 allow 255.255.255.0 192.168.1.0 255.255.255.0
Note L2L-VPN-CRYPTO-SITEC access-list traffic for SiteA to SiteC through a Tunnel between B - C
access-list L2L-VPN-CRYPTO-SITEC permit ip 192.168.1.0 255.255.255.0 192.168.3.0 255.255.255.0
Where
- OUTSIDE-NAT0 = is the ACL to be used in the NAT0 rules that will exempt SiteA SiteC NAT traffic. It is this time tied to the 'outer' interface, as traffic will be coming in and out through this interface to SiteB
- NAT = is the line of configuration NAT0
- L2l-VPN-CRYPTO-SITEA (and SITEC) = are the ACL in the configurations of VPN L2L that defines the SiteA LAN to LAN SiteC traffic should use existing VPN L2L connections.
Site C
access-list NAT0 note NAT0 rule for SiteC SiteA traffic
NAT0 192.168.3.0 ip access list allow 255.255.255.0 192.168.1.0 255.255.255.0
NAT (inside) 0 access-list NAT0
Note list-access-L2L-VPN-CRYPTO-SITEB SiteC to SiteA interesting traffic
L2L-VPN-CRYPTO-SITEB 192.168.3.0 ip access list allow 255.255.255.0 192.168.1.0 255.255.255.0
Where
- NAT0 = is the ACL to be used in the NAT0 rules that will exempt SiteC to SiteA NAT traffic
- NAT = is the line of configuration NAT0
- L2l-VPN-CRYPTO-SITEB = LCA in configurations VPN L2L that defines the SiteC LAN to LAN SiteA traffic must use the VPN L2L existing SiteB
To my knowledge, the foregoing must manage the selection NAT0 and traffic for VPN L2L connections. Naturally, the Interface/ACL names may be different depending on your current configuration.
Hope this helps
-Jouni
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