https://manpages.ubuntu.com/manpages/resolute/man5/firehol-tcpmss.5.html
Ubuntu Manpage: firehol-tcpmss - set the MSS of TCP SYN packets for routers
set the MSS of TCP SYN packets for routers
https://manpages.ubuntu.com/manpages/resolute/man4/ng_tcpmss.4freebsd.html
Ubuntu Manpage: ng_tcpmss - netgraph node to adjust TCP MSS option
netgraph node to adjust TCP MSS option
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