Players timeout on L4D2 server

[blaize]

Running the script worked fine. 14 rules added.
When I launch a game from an L4D2 lobby or when ppl try to connect to my server, they instantly timeout without the time of moving or choosing a team.
In /var/log/syslog I have found lot of udp spam line like this:

<|srcds-ipt|> udp spam: IN=ens18 OUT= MAC=6e:72:b5:8e:ece:aa:e6:73:44:d6:c6:08:00 SRC=194.118.68.64 DST=192.168.0.112 LEN=74 TOS=0x00 PREC=0x00 TTL=113 ID=55803 PROTO=UDP SPT=49919 DPT=27018 LEN=54

Left 4 Dead 2 server - almost vanilla - running on port 27018.

I don't use docker and I'm in a virtual machine or something like that. (I don't own the host)

[sapphonie]

This has only been tested on TF2, you'll have to get me a packet capture of you joining a server with something like WireShark so that I can update it to support multiple games

[blaize]

hello, thank you for taking time to look at my wireshark packet capture
L4D2_timeout.zip

I also modified the script for packet too big. the default cvar on L4D2 server is
net_maxroutable = 1200
net_splitrate = 1
net_maxfragments = 1200

RULE_FILTER="-m length --length 2401:65535"
and
--log-prefix "${LOGPREFIX} len > 2401: "