Software VPN from behind a VPN concentrator

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Hi -

I have a network with a 3005 concentrator and PIX 515 in parallel. Thre is a router on the public side of the PIX/3305 that also connects to my ISP. There is another oruter in front of the PIX/3305 that acts as my internal network default gateway and directs LAN-to LAN traffic to the 3005. my problem is when I try to use a software VPN (to a totally seperate network) from the internal network, I cannot connect. If I capture traffic to the other network on my PIX, it fails as follows: 192.168.x.x > 216.x.x.x icmp: 192.168.x.x UDP port 500 unreachable. I am allowing udp 500 traffic through an ACL, so i don't understand why this is happening. Is the ISAKMP traffic going out the concentrator? Can I prevent this? Any help is appreciated!!!

I have this problem too.
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ivillegas Thu, 10/11/2007 - 06:21

First make sure you are able to reach the destination network to which you are trying to establish Software VPN, using ping . Allow ICMP traffic to get through and test this and then check if tunnel is getting established. There might be also Nating issues. Check for this.


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