Date: Tue, 15 Feb 2005 13:18:08 +0100 From: Hiram Abiff <domain.admin@online.ie> To: freebsd-questions@freebsd.org Subject: Operation: "ipfw on a gateway box" Message-ID: <1108469888.4211e880197ca@mail.online.ie>
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I followed your advice and rewrote my firewall rules. Although, even now, there are some major difficulties. I still, can't acces the net from my 2 other computers via my FreeBSD firewalled gateway. Although I set up on it to allow traffic on ports 21, 22, 53, 8080 I can only telent to port 21, all the others report a "connection refused" error. I can ping the FreeBSD box, but i cannot ping any outside IP addresseses from the FreeBSD box or the other boxes on my home LAN. Also when FreeBSD is booting I caught some error messages that said unknow command "setup" for some of my firewall rules. I'm getting desperate please assist me in any way possible. Here's my fwrules file: > fwcmd="/sbin/ipfw" > > > #Outside interface > oif="tun0" > > > #Inside interface > iif="rl0" > > > # Force a flushing of the current rules before reload > $fwcmd -f flush > > > #Check the state of all packets > $fwcmd add check-state > > > #Divert all packets through the tunnel interface. > $fwcmd add divert natd ip from any to any via $oif > > > # Allow all data from my network card and localhost > $fwcmd add allow all from any to any via lo0 > $fwcmd add allow ip from any to any via $iif > > # Allow all connections that I initiate > $fwcmd add allow tcp from any to any out xmit $oif setup > > > # Once connections are made, allow them to stay open > $fwcmd add allow tcp from any to any via $oif established > > > # Everyone on the internet is allowed to connect > $fwcmd add allow tcp from any to any 22 setup > $fwcmd add allow tcp from any to any 21 setup > $fwcmd add allow tcp from any to any 8080 setup > $fwcmd add allow tcp from any to any 53 setup > $fwcmd add allow tcp from any to any 4662 setup > $fwcmd add allow udp from any to any 4672 setup > > > # This sends a RESET to all ident packets > $fwcmd add reset log tcp from any to any 113 in recv $oif > > > # Allow outgoing DNS queries ONLY to the specified servers > > > $fwcmd add allow udp from any to 161.53.114.135 53 out xmit tun0 > $fwcmd add allow udp from any to 161.53.114.145 53 out xmit tun0 > > > # Allow them back in with the answers > > > $fwcmd add allow udp from 161.53.114.135 53 to any in recv $oif > $fwcmd add allow udp from 161.53.114.145 53 to any in recv $oif > > > # Allow ICMP > $fwcmd add 65435 allow icmp from any to any > > > # Deny all the rest. > #$fwcmd add 65435 deny log ip from any to any -- "It was as though a veil had been rent. I saw on that ivory face the expression of sombre pride, of ruthless power, of craven terror -- of an intense and hopeless despair. Did he live his life again in every detail of desire, temptation, and surrender during that supreme moment of complete knowledge?"
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