Hello! My question is how to overwrite MSS value in SYN packets? I have read http://www.openbsd.org/faq/pf/ and found scrub option. My current rule is: scrub all no-df max-mss 1400 random-id fragment reassemble but it's not doing what I expect. It does packet fragmentation, and I want actual mss rewriting for outgoing SYN packets. Something like iptables -A FORWARD -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --set-mss 1400 in linux. Any ideas?
