Executing Script on Receiving Incoming Connection with Xinetd

Run script when someone telnet my server

installation:

sudo apt-get install xinetd telnetd

/etc/xinetd.d/telnet file content:

service login
{
    port            = 23 
    socket_type     = stream
    protocol        = tcp
    wait            = no
    user            = root
    server          = /usr/bin/script.sh       
    server_args     = test
}

/etc/xinetd.conf content:

{
# Please note that you need a log_type line to be able to use log_on_success
# and log_on_failure. The default is the following :
# log_type = SYSLOG daemon info
instances = 60
log_type = SYSLOG authpriv
log_on_success = HOST PID
log_on_failure = HOST
cps = 25 30
}

includedir /etc/xinetd.d

/etc/inetd.conf content:

telnet      stream  tcp nowait telnetd  /usr/bin/script.sh

Restart xinetd:

/etc/init.d/xinetd restart

EDIT:
Don't forget

chmod +x /usr/bin/script.sh

Xinetd server connection refused

Did you add that and then fail to tell xinetd to re-read the configuration files? You can use kill -HUP $(< /var/run/xinetd.pid) to restart it with a re-read of configuration files in a typical install.

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