Date: Tue, 08 Oct 2002 16:12:48 +0300 From: Kim Helenius <kim.helenius@kepa.fi> To: freebsd-questions@freebsd.org Subject: Puzzling NATD problem - revisited Message-ID: <3DA2D9D0.6050908@kepa.fi>
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The setting: Network topology: Internet---Campus Network---(xl0)FreeBSD NATD machine(xl1)---Internal host A custom kernel build including the following options: options IPFIREWALL options IPDIVERT Used the command: sysctl net.inet.ip.forwarding=1 And started natd with natd -interface xl0 Then did, straight from the manpage, the following firewall rules: /sbin/ipfw -f flush /sbin/ipfw add divert natd all from any to any via xl0 /sbin/ipfw add pass all from any to any Now NAT works perfectly for the internal host, but (almost) all TCP connections cease to work to/from the NATD machine. AFAIK UDP and ICMP work perfectly. I've tried this on two different FreeBSD machines in the same network with identical results. If I remove the divert rule, everything works perfectly, except of course for the NAT. There have been no similar, puzzling effects on any Linux hosts I know of in the same network. Therefore I'm sure there's some knob I haven't pushed yet :) I'm aware this doesn't make much of a firewall but I'd like to get natd working before I run the firewall script. -- Kim Helenius kim.helenius@kepa.fi To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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