OpenBSD pf - implementing the equivalent of an iptables DNAT

Solution 1:

I'm not totally sure if that's what you want but I use something likt this to redirect traffic to another IP.

rdr pass on $ext_if proto icmp from any to $OLD_IP -> $NEW_IP

The syntax is not tested but might work

Something similar works on FreeBSD

Edit

After a look into the OpenBSD manpages this syntax might work:

pass in on $ext_if proto icmp from any to $OLD_IP rdr-to $NEW_IP