Firewall options/Packet manipulation 990 Interface clamping options #include Adjust MSS for IPv4 transit packets clamp-mss-to-pmtu clamp-mss-to-pmtu Automatically sets the MSS to the proper value 536-65535 TCP Maximum segment size in bytes (clamp-mss-to-pmtu) Adjust MSS for IPv6 transit packets clamp-mss-to-pmtu clamp-mss-to-pmtu Automatically sets the MSS to the proper value 1220-65535 TCP Maximum segment size in bytes (clamp-mss-to-pmtu)