How to check if a port is opened or closed on a VPS linux?

melviin

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I am running a VPS for testing my blogs. I want to know how to check if a port is opened or closed on a VPS linux?

If it's opening then how to close it and vise versa?
 

Hassan

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Code:
nmap -sT -O localhost
Use iptables for close ports.
 

ElixantTechnology

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Does your VPS have cPanel or DirectAdmin on it? If so, I recommend installing ConfigServer Firewall; this will give you a nice interface to manage your firewall and some security tips/pointers
 

RDO Servers

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There are also several online port scanners you can use.

After checking everything server side, I like using these as a double check to see what is globally open.
 
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