I have two Windows 2003 SP1 Domain Controllers at different sites on the
Internet.  Both sides are protected by CheckPoint FW-1 R55W.  There is a
site-to-site VPN between the sites.  The rules are configured to allow all
traffic between sites.

 

Problem #1 (fixed):

The domain controllers cannot replicate Active Directory information between
them.  The firewall's SmartDefense is rejecting the packets.  I avoided this
by setting MS-RPC smart defense to "monitor only".

 

Problem #2:

Many packets sent between the domain controllers are dropped by the firewall
for:  "TCP packet out of state: First packet isn't SYN  tcp_flags: ACK".  I
cannot get the domain controllers to replicate, and my AD tools indicate a
communications issue.

 

Any ideas?

 

-----------------------------------------------

Tony Pombo

Systems and Security Architect

Edict Systems, Inc.

937-429-4288 x279

[EMAIL PROTECTED]

 


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