PPPOE 1480
pppoe ipv4 mtu 1480
pppoe ipv4 mss 1440
pppoe ipv6 mtu 1460
pppoe ipv6 mss 1420
自动MSS
iptables -t mangle -A POSTROUTING ! -o br0 -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu
ip6tables -t mangle -A POSTROUTING ! -o br0 -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu
手动指定MSS
iptables -t mangle -A POSTROUTING ! -o br0 -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --set-mss 1440
ip6tables -t mangle -A POSTROUTING ! -o br0 -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --set-mss 1420
iptables -t mangle -A FORWARD -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu
ip6tables -t mangle -A FORWARD -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu
PPPOE 1492
pppoe ipv4 mtu 1492
pppoe ipv4 mss 1452
pppoe ipv6 mtu 1472
pppoe ipv6 mss 1432
自动MSS
iptables -t mangle -A POSTROUTING ! -o br0 -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu
ip6tables -t mangle -A POSTROUTING ! -o br0 -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu
手动指定MSS
iptables -t mangle -A POSTROUTING ! -o br0 -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --set-mss 1452
ip6tables -t mangle -A POSTROUTING ! -o br0 -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --set-mss 1432
iptables -t mangle -A FORWARD -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu
ip6tables -t mangle -A FORWARD -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu