determine what services using the particular port

[Ricky_4]

Hi All,

We would like to determine what are daemon or services using this port 53336 as application developer and dba denied owning this port. As much as possible, we would like to limit the open port in prod.

We will highly apreciated your response.

Thanks.

Adriatico

[Alex Glennie]

see http://hpux.cs.utah.edu/hppd/hpux/Sysadmin/lsof-4.75/

fyi :

Additional lsof usage/syntax examples:
--------------------------------------
#lsof -nP -i tcp:512-1024 | wc -l
This will capture the TCP session in that port range and give the number.

#lsof -nP -i udp:512-1024 | wc -l
Does the same thing for UDP connections.

#lsof -nP -i tcp:842
Gives Specific Port information for tcp port 842.

#lsof -nP -i tcp:telnet
Gives Specific Port information for tcp telnet service.

[Raj D.]

Hi Adriatico,

You can check for openports details with the help of lsof utility.

Here it is:

http://hpux.cs.utah.edu/hppd/hpux/Sysadmin/lsof-4.76/


Cheers,
Raj.

[Sandman! · Accepted solution]

Hi Adriatico...if you don't have lsof then you can verify with netstat as follows:

# netstat -an | awk 'z[split($4,z,".")]==53336'

cheers!