Lloyd Parkes <[email protected]> wrote: >The network is a 1Gb/s LAN through to a smaller NetBSD router running >NPF with MSS clamping enabled so that I can get Netflix. My ISP does not >use CGN for my IPv4 connection. My IPv6 connection is tunnelled through >to Hurricane Electric in Sydney, Australia.
Have you tried disabling IPv6 or explicitly connecting using IPv4 ? I don't see any problems using IPv6 through NPF to update cvs but I have native IPv6 and can use a 1500 byte MTU. I'm also using cvs.n.o instead of anoncvs.n.o but they have adjacent IPv4 addresses. I'm guessing that your IPv6 tunnel has a lower MTU than your IPv4 connection to your ISP.
