Hello,

I'm curious to know if anyone succeed to run a public CSGO server behind a
NAT ?

I use the +net_public_addr command line parameter with external public IP,
sv_lan 0, all required ports forwarded tcp/udp...
The server query works. But it is impossible to connect.

The network dump give a single packet exchange:

The client send:

20:20:22.974654 IP (tos 0x0, ttl 122, id 18949, offset 0, flags [none],
proto UDP (17), length 51)  87.121.X.X.27005 > 57.128.X.X.20016: [udp sum
ok] UDP, length 23
0x0000:  a8a1 598c 6b5b 00ff 0311 fffd 0800 4500  ..Y.k[........E.
0x0010:  0033 4a05 0000 7a11 5e0e 5779 d11e 3980  .3J...z.^.Wy..9.
0x0020:  368f 697d 4e30 001f df43 ffff ffff 7163  6.i}N0...C....qc
0x0030:  6f6e 6e65 6374 3078 3035 4344 4336 3644  onnect0x05CDC66D
0x0040:  00

The server answer:

20:20:22.994917 IP (tos 0x0, ttl 63, id 53102, offset 0, flags [DF], proto
UDP (17), length 93)  57.128.X.X.20016 > 87.121.X.X.27005: [bad udp cksum
0x9901 -> 0xe42d!] UDP, length 65
0x0000:  00f1 0311 ffff a8a1 598c 6b5b 0800 4500  ........Y.k[..E.
0x0010:  005d cf6e 4000 3f11 d37a 3980 368f 5779  .].n@.?..z9.6.Wy
0x0020:  d11e 4e30 697d 0049 9901 ffff ffff 416d  ..N0i}.I......Am
0x0030:  c6cd 0503 0000 0000 003c 5254 0000 0030  .........<RT...0
0x0040:  0101 636f 6e6e 6563 7430 7830 3543 4443  ..connect0x05CDC
0x0050:  3636 4400 1636 0000 7075 626c 6963 0000  66D..6..public..
0x0060:  ffff ffff ffff ffff 0000 00              ...........

The client does receive the server answer.
But nothing more.

Any idea ?

Thanks

-- 
Johann
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