Hi everyone, I have a question regarding my statefull ipfw ruleset. I have the following rules:
---begin--- $cmd 00015 check-state #www $cmd 00200 allow tcp from any to any 80 out via $pif setup keep-state #mail $cmd 00231 allow tcp from any to any 110 out via $pif setup keep-state #ftp $cmd 00283 allow tcp from any to any 21 out via $pif setup keep-state # Allow in standard www function because I have apache server $cmd 00400 allow tcp from any to me 80 in via $pif setup limit src-addr 2 # Allow in FTP $cmd 00410 allow tcp from any to me 21 in via $pif setup limit src-addr 2 # Allow in mail $cmd 00420 allow tcp from any to me 110 in via $pif ---end--- (there are a lot more rules, but these are the ones that it's about) The problem that I'm having is that I can't check mail, and can't FTP and see a lot of: ipfw: 299 Deny TCP [my-server-ip]:80 [some-ip]:[some-port-other-than-80] out via em0 messages in my logfile. When I try to check mail I see in my log: ipfw: 299 Deny TCP [my-server-ip]:110 [my-home-pc-ip]:[some-port-other-than-110] out via em0 What happens (I think, as far as I understand ipfw), there is an connection setup on port 21/80/110 (ftp/http/mail), which is allowed by the rules. A dynamic rules is created, but then the other computer switches ports. The check-state command checks for a dynamic rule, but the port doesn't match anymore and so it doesn't find a dynamic rule and the other rules also don't apply, since they only allow connection initialization. Am I correct? I can solve all this by putting in the rule: # $cmd 00020 allow tcp from any to any established But I learned that that is not the right way to do this in a statefull ruleset, because the dynamic rules don't have any use in this way. So what is the right way to solve this? Thanks a lot in advance! _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
