Date: Thu, 22 Apr 2004 13:53:51 +0200 From: Arek Czereszewski <arek@wup-katowice.pl> To: freebsd-questions@freebsd.org Subject: Newbie: ipfw and my own DNS Message-ID: <4087B24F.6020607@wup-katowice.pl>
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Hi
I have firewall based on rc.firewall:
#!/bin/sh
fwcmd="/sbin/ipfw"
${fwcmd} -f flush
${fwcmd} add 100 pass all from any to any via lo0
${fwcmd} add 200 deny all from any to 127.0.0.0/8
${fwcmd} add 300 deny ip from 127.0.0.0/8 to any
${fwcmd} -f flush
oif="fxp0"
iif="fxp1"
# Stop spoofing
#${fwcmd} add deny all from ${inet}:${imask} to any in via ${oif}
#${fwcmd} add deny all from ${onet}:${omask} to any in via ${iif}
# Stop RFC1918 nets on the outside interface
${fwcmd} add deny all from any to 10.0.0.0/8 via ${oif}
${fwcmd} add deny all from any to 172.16.0.0/12 via ${oif}
${fwcmd} add deny all from any to 192.168.0.0/16 via ${oif}
# Stop draft-manning-dsua-03.txt (1 May 2000) nets (includes RESERVED-1,
# DHCP auto-configuration, NET-TEST, MULTICAST (class D), and class E)
# on the outside interface
${fwcmd} add deny all from any to 0.0.0.0/8 via ${oif}
${fwcmd} add deny all from any to 169.254.0.0/16 via ${oif}
${fwcmd} add deny all from any to 192.0.2.0/24 via ${oif}
${fwcmd} add deny all from any to 224.0.0.0/4 via ${oif}
${fwcmd} add deny all from any to 240.0.0.0/4 via ${oif}
#NAT
${fwcmd} add divert natd all from any to any via ${oif}
# Stop RFC1918 nets on the outside interface
${fwcmd} add deny all from 10.0.0.0/8 to any via ${oif}
${fwcmd} add deny all from 172.16.0.0/12 to any via ${oif}
${fwcmd} add deny all from 192.168.0.0/16 to any via ${oif}
# Stop draft-manning-dsua-03.txt (1 May 2000) nets (includes RESERVED-1,
# DHCP auto-configuration, NET-TEST, MULTICAST (class D), and class E)
# on the outside interface
${fwcmd} add deny all from 0.0.0.0/8 to any via ${oif}
${fwcmd} add deny all from 169.254.0.0/16 to any via ${oif}
${fwcmd} add deny all from 192.0.2.0/24 to any via ${oif}
${fwcmd} add deny all from 224.0.0.0/4 to any via ${oif}
${fwcmd} add deny all from 240.0.0.0/4 to any via ${oif}
# Allow TCP through if setup succeeded
${fwcmd} add pass tcp from any to any established
# Allow IP fragments to pass through
${fwcmd} add pass all from any to any frag
# Allow setup of incoming email
${fwcmd} add pass tcp from any to me 25 setup
# Allow access to our DNS
${fwcmd} add pass tcp from any to me 53 setup
${fwcmd} add pass udp from any to me 53
${fwcmd} add pass udp from me 53 to any
# Allow access to our WWW
${fwcmd} add pass tcp from any to me 80 setup
# Allow access to our POP3S
${fwcmd} add pass tcp from any to me 995 setup
# Allow access to our SMTP
${fwcmd} add pass tcp from any to me 25 setup
# Reject&Log all setup of incoming connections from the outside
${fwcmd} add deny log tcp from any to any in via ${oif} setup
# Allow setup of any other TCP connection
${fwcmd} add pass tcp from any to any setup
# Allow DNS queries out in the world
${fwcmd} add pass udp from me to any 53 keep-state
${fwcmd} add pass udp from any to any 53 keep-state
last rule is default deny all any to any
And now problem:
when i try check something in dns i don't have connection:
[root@poczta ~]# nslookup poczta.wup-katowice.pl
*** Can't find server name for adress 213.216.67.81: Time out
This IP is fxp1 on server.
sockstat show:
bind named 588 20 udp4 213.216.67.81:53 *:*
bind named 588 21 tcp4 213.216.67.81:53 *:*
Wher is error in rules?
If anybody can help me?
Thank you
Arek
--
Arek Czereszewski | jid: aro(at)chrome.pl
arek(at)wup-katowice.pl | gg: 1349941
"*nix is like a wigwam:
no windows, no gates, apache inside."
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