Networking: how to block port from broadcasting in HP-UX

[Avinash20]

I need to block some of the ports which are broadcasting, due to which my network is getting congested.
All are in intranet, and dont go via firewall.

Is is possible to block port from broadcasting.

[Steven E. Protter · Accepted solution]

Shalom,

netstat -an will list the applications and what ports they are using. The best way to stop this activity is to identify and configure the application doing the broadcasting to stop doing so.

Using netfilter firewall for HP-UX will probably break the application that is misbehaving. Of course then you will have identified the application.

SEP

[Avinash20]

The port that is used by the udp is Randomly selected. This is not a well known port and don't have any entry in /etc/services file.
See the output of netstat command below:

#netstat -an | grep *.53455
udp 0 0 *.53455 *.*

How to check which application is using the port ??

Will lsof help me ??
Could you suggest any other HP-UX in-built command which will help me to find the application which is using the port ??

[Kenan Erdey]

Hi,

try lsof -i:port_number.

Kenan.

[Avinash20]

Can block by using IP Filter
Application team needs to check why the port is broadcasting.

[Avinash20]

check above