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Two VPN tunnels but only one starts

I have an ASA5505 that I need to connect to two remote networks. I worked though getting the first tunnel to my HQ working. I need to now add a remote office. My HQ and the remote office both use SonicWALL PRO2040 devices, same firmware and OS.

I used the working tunnel config to create the second tunnel. The first tunnel starts and works perfectly. When I try to send traffic to the remote office the second tunnel never even starts.

I look in the logs at both ends (I gain access to the remote location via a software client) and there are no exchanges between my ASA and the PRO2040.

What more might I need to do to get the ASA to start the tunnel?

I'm running 8.0 on my ASA. All the SW's are 4.0.0.2 Enhanced.

1 ACCEPTED SOLUTION

Accepted Solutions
Community Member

Re: Two VPN tunnels but only one starts

Hi,

ok, so connections to the remote networks need to have a nat 0 applied to them. In your config your nat 0 looks like this:

nat (inside) 0 access-list outside_cryptomap

in order to get your new VPN to work, you will need to apply this to the new traffic, however you will need to create a new acl for the NAT 0 statement. The commands you will need to complete this are as follows:

access-list nonat extended permit ip inside-network 255.255.255.0 my-hq 255.255.248.0

access-list nonat extended permit ip inside-network 255.255.255.0 office2 255.255.255.0

no nat (inside) 0 access-list outside_cryptomap

nat (inside) 0 access-list nonat

clear xlate

Everything else loks ok, so that should do it :)

5 REPLIES
Community Member

Re: Two VPN tunnels but only one starts

Can you post a sanitized copy of the config?

Community Member

Re: Two VPN tunnels but only one starts

Config is attached.

Community Member

Re: Two VPN tunnels but only one starts

I should mention that the VPN to XX.XX.XX.XX is the one that works.

Community Member

Re: Two VPN tunnels but only one starts

Hi,

ok, so connections to the remote networks need to have a nat 0 applied to them. In your config your nat 0 looks like this:

nat (inside) 0 access-list outside_cryptomap

in order to get your new VPN to work, you will need to apply this to the new traffic, however you will need to create a new acl for the NAT 0 statement. The commands you will need to complete this are as follows:

access-list nonat extended permit ip inside-network 255.255.255.0 my-hq 255.255.248.0

access-list nonat extended permit ip inside-network 255.255.255.0 office2 255.255.255.0

no nat (inside) 0 access-list outside_cryptomap

nat (inside) 0 access-list nonat

clear xlate

Everything else loks ok, so that should do it :)

Community Member

Re: Two VPN tunnels but only one starts

That took care of the problem. Thanks so much.

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