Problems That Aren't the Firewall's Fault
There are several issues that some people think are related to the firewall or think that their firewall should be able to do. This section documents some of these issues that have nothing to do with FireWall-1.
6.35. Some Services Are Slow to Connect
Some services are slow to connect either because the remote server is not able to do a reverse DNS lookup on the IP address you are coming from (it is timing out while looking) or because they are expecting an answer to their query on the ident port. To fix the latter problem, see FAQ 6.36. To fix the former problem, you must ask your DNS administrator to modify the reverse lookup tables so that the IP address you are coming from is resolvable.
6.36. The ...
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