Is there an echo server I can use to test my programs?

Question

I'm writing a simple client to ping a server with a packet on port 7 (echo) and then waiting for a reply. Is there a server that I can use to test this?

score 3 · Answer 1 · answered Jan 30 '10 at 21:41

3

sudo nc -vvlp 7 -e /bin/cat

If you happen to have a inetd installed, most of them have echo built-in. Snippet from /etc/inetd.conf:

echo   stream  tcp nowait  nobody  internal
echo    dgram   udp wait    nobody  internal

answered Jan 30 '10 at 21:41

user1686

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(with nc.traditional / the one by Hobbit) – Tobu Jan 30 '10 at 22:15
Tobu: Works fine on GNU netcat too. – user1686 Jan 31 '10 at 17:42
Use `nc` from package `ncat` which supports option `-e` (as opposed to `netcat-openbsd`) – macieksk Jul 30 '20 at 13:48
It doesn't work. See bug https://github.com/nmap/nmap/issues/962 – cagney Nov 01 '21 at 19:51

score 1 · Accepted Answer · answered Jan 30 '10 at 21:18

1

Here is a simple echo server:

sudo socat PIPE TCP-LISTEN:7,fork

answered Jan 30 '10 at 21:18

Tobu

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sudo: socat: command not found – Amit Apr 25 '12 at 12:08

Is there an echo server I can use to test my programs?

2 Answers2