On Mon, Jun 18, 2007 at 11:46:42AM +0100, first last wrote: > Hi, > > I am trying to set up a firewall rule so calls to old_mailserver:25 get > redirected to localhost:25. I have seen quite a few rules and none seem > to work. > > I have tried with the firewall enabled (configured to allow smtp) and > disabled, but it doesn't seem to make a difference. > > One of the commands I have been using is: > /sbin/iptables -t nat -I PREROUTING -p tcp -d old_mailserver_ip/32 > --dport 25 -j REDIRECT --to 127.0.0.1:25
Try this: iptables -t nat -I PREROUTING -p tcp -d old_mail_server_ip --dport 25 \ -j REDIRECT iptables -t nat -I OUTPUT -p tcp -d old_mail_server_ip --dport 25 \ -j REDIRECT > Am I missing anything? Locally generated packets go through OUTPUT, but not PREROUTING, IIRC. -- lfr 0/0
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