Hi, On Thu, Feb 03, 2022 at 02:30:38PM +0100, Gert Doering wrote: > and server pushes this: > > 2022-02-03 14:28:24 PUSH: Received control message: 'PUSH_REPLY,route > 10.194.0.0 255.255.0.0,route-ipv6 fd00:abcd:194::/48,tun-ipv6,route > 10.194.2.1,topology net30,ping 10,ping-restart 30,compress lz4,ifconfig-ipv6 > fd00:abcd:194:2::100c/64 fd00:abcd:194:2::1,ifconfig 10.194.2.54 > 10.194.2.53,peer-id 0,cipher AES-256-GCM,key-derivation tls-ekm'
Looking more closely, this is followed by...
2022-02-03 17:34:29 PUSH: Received control message: 'PUSH_REPLY,route
10.194.0.0 255.255.0.0,route-ipv6 fd00:abcd:194::/48,tun-ipv6,route
10.194.2.1,topology net30,ping 10,ping-restart 30,compress lz4,ifconfig-ipv6
fd00:abcd:194:2::100c/64 fd00:abcd:194:2::1,ifconfig 10.194.2.54
10.194.2.53,peer-id 1,cipher AES-256-GCM,key-derivation tls-ekm'
2022-02-03 17:34:29 WARNING: Compression for receiving enabled. Compression has
been used in the past to break encryption. Sent packets are not compressed
unless "allow-compression yes" is also set.
2022-02-03 17:34:29 OPTIONS IMPORT: timers and/or timeouts modified
2022-02-03 17:34:29 OPTIONS IMPORT: compression parms modified
2022-02-03 17:34:29 OPTIONS IMPORT: --ifconfig/up options modified
2022-02-03 17:34:29 OPTIONS IMPORT: route options modified
2022-02-03 17:34:29 OPTIONS IMPORT: peer-id set
2022-02-03 17:34:29 OPTIONS IMPORT: adjusting link_mtu to 1625
2022-02-03 17:34:29 OPTIONS IMPORT: data channel crypto options modified
"adjusting link_mtu to 1625" which then maps to a tun_mtu of 1572,
and
2022-02-03 17:34:29 /sbin/ifconfig tun0 10.194.2.54 10.194.2.53 mtu 1572
netmask 255.255.255.255 up
Which happens in adjust_mtu_peerid() iff there is no --link-mtu in
the config (which it isn't)...
This binary is extremely stubborn about it, as in "even if I configure
--tun-mtu 1490, I get a larger mtu configured afterwards".
Maybe this is a transient effect which will disappear when all of the
patchset is in... trying this next.
gert
--
"If was one thing all people took for granted, was conviction that if you
feed honest figures into a computer, honest figures come out. Never doubted
it myself till I met a computer with a sense of humor."
Robert A. Heinlein, The Moon is a Harsh Mistress
Gert Doering - Munich, Germany g...@greenie.muc.de
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