AD Replication over SonicWall site-to-site VPN

[Guest]

Please forgive an old geek for posting the same question to multiple groups.
It's an act of desperation.

Had a working multi-site Windows 2003 domain. Replication was happening
cleanly and on schedule. In June, implemented a SonicWall 2040 at the home
office and SonicWall TZ-170s at the remote offices and connected via
site-to-site VPN. Now, the domain controllers will not replicate. The most
frequent reference is to the RPC server being unavailable. I have been
through all of the available troubleshooting steps and nothing has resolved
the problem.

I did not do the firewall configuration but it seems pretty straight
forward. I have seen for myself that there are no rules in place restricting
any traffic on VPN to VPN connections.

Any advice, help, even the smallest tid-bit would be appreciated. Thanks in
advance.

 

[SWalters]

Had a working multi-site Windows 2003 domain. Replication was happening
cleanly and on schedule. In June, implemented a SonicWall 2040 at the
home office and SonicWall TZ-170s at the remote offices and connected
via site-to-site VPN. Now, the domain controllers will not replicate.
The most frequent reference is to the RPC server being unavailable. I
have been through all of the available troubleshooting steps and nothing
has resolved the problem.

I did not do the firewall configuration but it seems pretty straight
forward. I have seen for myself that there are no rules in place
restricting any traffic on VPN to VPN connections.

Any advice, help, even the smallest tid-bit would be appreciated. Thanks
in advance.

Can you telnet from all servers to all other servers via port 135? This port
is used by Windows to replicate AD.