https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=165059
--- Comment #40 from Tom Jones <[email protected]> ---
Some extra info from demido via irc
https://termbin.com/et91 is my wireguard setup that works (but has tiny
throughput down to wg client) including iperf tests from wg client to wg server
over tunnel, wg client to wg server over inet, and wg server to wg client over
tunnel. https://termbin.com/07dl is networking info on wg client. FIXED: i
isolated the 'solution' to being adding 'hw.vtnet.csum_disable="1"' to
/boot/loader.conf. nothing else needed, and download speed of freebsd (and
debian) install isos from wg client became nearly as fast as wg server. this
seems related but separate from similar suggestions of disabling tso and lro as
i /only/ needed to disable csum.
keywords: nat, checksum, vtnet. related bugs:
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=235607,
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=263229,
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=165059,
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=259249,
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=170081
other links:
https://lists.freebsd.org/pipermail/freebsd-questions/2021-January/292565.html,
https://forums.freebsd.org/threads/wireguard-vpn-slow-speed.73490/page-2#post-584231,
https://sourceopen.com/index.php/howto-fix-slow-networking-with-a-wireguard-server-in-a-freebsd-jail-on-a-vps-and-slow-downloads-in-a-jail-on-a-vps/,
https://forums.freebsd.org/threads/nat-low-speed-outside-of-local-subnet.49498/,
https://serverfault.com/questions/817664/slow-network-fixed-adding-hw-vtnet-csum-disable-1-what-are-the-posible-side-effe,
https://imil.net/blog/posts/2019/freebsd-networking-issues-disable-offloading-and-checksum/,
https://www.mail-archive.com/[email protected]/msg03651.html, more
https://search.brave.com/search?q=freebsd+nat+vtnet+disable+checksum
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