trace a particular IP and port

tcptraceroute   xx.xx.xx.xx 9100

if you didn't find it you can install it

yum -y install tcptraceroute

aptitude -y install tcptraceroute

You can use the default traceroute command for this purpose, then there will be nothing to install.

traceroute -T -p 9100 <IP address/hostname>

The -T argument is required so that the TCP protocol is used instead of UDP.

In the rare case when traceroute isn't available, you can also use ncat.

nc -Czvw 5 <IP address/hostname> 9100

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