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Hello Roberto,
Am 03.05.2021 um 14:51 schrieb Roberto José Etcheverry Romero <yggdrasil.raiker@xxxxxxxxx>:
I would rather use nc than telnet to debug that kind of stuff.
The most important point is to see if the TCP session can be built. Implementations of netcat I know of output diagnostic messages only when adding -v. You need to think about that. Simple telnet always tells what it's doing.
Connection refused: Peer doesn't have something listening on the given port *or* a firewall in between is answering on the peer's behalf with a TCP RST.
Client is trying with "Trying <ipaddr>" and nothing happens: Firewall in between silently discards packets.
Trying <ipaddr>...
Connected to <ipaddr>.
Escape character is '^]'.
=> TCP-Connection has been established successfully. Any remaining problems appear on a higher level.
:wq! PoC
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