Member Avatar for +_+man

see if the case is just for example how can i find its port number need immediate reply

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An IP address has no single "port" — ports are properties of services running on a host at that address. In many contexts the string 10.0.0.0 is the network base (private IPv4 space per RFC 1918), not a usable host address. For a useful scan or lookup, target an actual host IP (for example 10.0.0.5) and confirm the subnet/netmask first.

As noted, local tools can show listening ports and the owning process. Prefer modern utilities that give PID/service mapping. Example checks (run as root to see all info):

sudo ss -tulpen
sudo lsof -i -P -n

ss and lsof show which sockets are listening and which process owns them; see the ss man page for flags and output details (ss(8) reference). lsof documents its network options on most systems (lsof man page).

For a remote host, service discovery requires scanning, which is what suggested. A simple, commonly used scan that probes every TCP port and tries to identify services is:

nmap -p- -sV 10.0.0.5

-p- scans all ports; -sV attempts service/version detection. See official Nmap docs for options and scan behavior (nmap reference). Important: scanning other networks without permission can be illegal or trigger intrusion detection; expect firewalls, NAT, and port filters to hide open services.

If no ports are found, verify the target is a host (not a network address), check for host-based firewalls or router NAT/port-forwarding, and capture traffic with tcpdump when testing from inside the same LAN to confirm probes and replies.

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Member Avatar for csurfer

Try netstat command followed by usage of some filter like grep.

Edited by csurfer because: n/a
Member Avatar for CimmerianX

If it's a remote IP and you are looking for its open ports... use nmap

something like: nmap -p 1-65535 -T4 -A -v -PE -PS22,25,80 -PA21,23,80,3389

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