I dont know what ports your Sybase uses but if it runs on a Linux machine netstat -plt (for TCP) and netstat -plu (for UDP) should give you an idea what is in use. My /etc/services says: sybase-sqlany 1498/tcp # Sybase SQL Any sybase-sqlany 1498/udp # Sybase SQL Any sybasedbsynch 2439/tcp # SybaseDBSynch sybasedbsynch 2439/udp # SybaseDBSynch sybaseanywhere 2638/tcp # Sybase Anywhere sybaseanywhere 2638/udp # Sybase Anywhere Some (or all) of those will be probably worth examining. Since you are talking about Zope I figure you are trying to access the Sysbase DB via some Zope interface (?) - if this is the case you should be able to find some information in the Zope docs as well. Depending on how complicated the communication between Sysbase and the Zope server is (i.e. FTP is an example) NATing could get quite a pain. Can't talk about iptables yet but from my experience with ipchains and ipmasqadm NAT is no big deal once you know your ports. Erwin Thomas_Janke@prisma-edv.de wrote:
Well, I have a Sybase server running on an internal computer. A Zope-Server needs to have access to that computer. So a certain number of ports should be available.
Is there a way to bypass the firewall for exactly one external computer? I heard something about /etc/fw_friends, but setting this didn't work.
Thanks for your help
Thomas
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