udp2raw
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wangyu-
Blocked by firewall with faketcp mode
English Only (except for bug reporting). When connection stopped I restarted the program.
I observed the server is ready very fast. But client is not ready. It always connection. It changes from phrase 2 to 1 then 2 to 1 and always not successful. (Sometimes it will succesful but if you restart app then it won't success anymore) I find that there don't exist respond from server when client is fail to connect. It always send out packet but no packet will return. And this happens after server ready!
And if I'm not mis-remember when server is ready. It's log is stopped but client's log is flooding.
Having similar issue. No SYN ACK is actually sending back.
Using udp2raw_arm server with udp2raw_mp client.
same problem here. firewall did't think it is a tcp connect. maybe this is the reason for the traffic interruption?
Please provide details (e.g. config and environment) for reproducing the problem.
What you really observed is "udp2raw not able to connect". As far as I can see "blocked by firewall" is only your own guess. Please stop using misleading claims before the reason is addressed.
Many reasons might cause udp2raw not able to connect, for example: mistakes in the conf, VPS doesn't support raw socket well, NAT device not compatible with the way fakeTCP works, some local iptables rule conflict with udp2raw's.
Not my guess. I see there don't have respond from server how can it's guess?
I observed the server is ready very fast. But client is not ready.
Server ready very fast then client never ready. And at the same time when client failing and start to connect infinitly, the server's log never grow anymore.
Sometimes it will succesful but if you restart app then it won't success anymore
There are successful connections and it's not nat problem because I don't use nat.
conf is fine because it's tested on local environment without problem
It usually useable when it's 1st time you started the connection in a day but after some time it stopped working
VPS doesn't support raw socket well How can I know whether server support it well or not?
Maybe I transmitted the data without encrypt and there is someting caused block? I'm not very sure. Hi @ttimasdf can you reproduce it today?
According to my observation, my connection-tracking firewall see a TCP Syn connect but not (never) estabished. It'll try to cut the connection after timeout. After that I changed --seq-mode from 3 to 4. And the firewall CAN identify it as a TCP Established connect. That's better.
But still I have traffic interruption problem each 2 or 3 hour with about 20 seconds interruption. I don't know if it is related with firewall.
@k79e try --seq-mode 4 and the firewall will think it is a established TCP connection.