Firewall Wizards mailing list archives

Re: VPN Problems between WatchGuard Firebox 700 and Netscreen 5


From: Scott Higginbotham <scotth () voicenet com>
Date: Thu, 4 Mar 2004 17:49:31 -0500 (EST)


David:

Some things to do if your still having the problem -

On the Netscreen side, from the command line:

'set console dbuf'
'debug flow basic'

Check and make sure the packets sent are being encrypted -

you may want to specify a flow filter to narrow down the traffic, you can
use:

'set ffilter src-ip'
'set ffilter dst-ip'

to narrow down the traffic

'get dbuf stream'

will show the debug traffic, and

'clear dbuf'

will reset it out -

'undebug all'  - does just that - stops the debugging.  Hope this helps
you determine the issue -

Scott Higginbotham
Voicenet Network Operations
215.674.9290 or 1.800.835.5710
scotth () voicenet com


On Tue, 2 Mar 2004, David Kison wrote:

Good Morning.

I am currently experiencing getting a IPSEC VPN between a WatchGuard Firebox
700 and a Netscreen 5 functioning in both directions.  I am able to pass
traffic from behind the Firebox to the remote network and get a return but
if I am attempt to pass traffic from behind the Netscreen 5, I am 100%
unsuccessful.  In the traffic logs on the WatchGuard, I am seeing denies
related to spoofed source packets on the IPSEC "interface".  It appears that
the Netscreen is passing the public address of the firewall instead of the
private address of the initiating system behind the Netscreen.  Both
firewalls are NATing private Class C networks.

I am out of ideas on the issue.  Has anyone seen a similar issue?  Any
solutions?

Thanks in advance.

Dave

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