Checking application on particular port

[n00body]

Hi Gurus ... do you know how to define which application is binding to specific port other than checking at /etc/services .

For example .. i'm trying to check the application that utilize high WAN utilisation between these 2 nodes .. i captured the netstat

$ netstat -an | grep 243.69

tcp 0 11 10.243.11.153.59619 10.243.69.117.52828 ESTABLISHED

tcp 0 0 10.243.11.153.49198 10.243.69.117.5555 ESTABLISHED

tcp 0 0 10.243.11.153.50373 10.243.69.117.5555 ESTABLISHED

tcp 0 0 10.243.11.153.59619 10.243.69.117.53876 ESTABLISHED


I only able to grep 5555 info from the /etc/services whilst the port 53876 & 52828 yield no info from the /etc/services .

Regards ,
n0body

[Ivan Krastev]

Use lsof utility:

lsof -i tcp | grep port

Second columd is a PID.

regards,
ivan

[Aneesh Mohan]

Hi ,

Check it out ,this may help you much .

http://forums12.itrc.hp.com/service/forums/questionanswer.do?admit=109447627+1215367503475+28353475&threadId=1183877

Thanks,

Aneesh

[n00body]

Unfortunately the server that I'm administering have no lsof installed .:( . Its gonna be long way to go to get the permission through change request to install this helpful tool . That's why I was relying on netstat .. :( .Is there any other native way that I can use ? Anyway .. thanks guys .

[Torsten.]

The file /etc/services lists "well known ports", see

http://www.iana.org/assignments/port-numbers

Ports in range from 49152 through 65535 are Dynamic and/or Private Ports (not listed in /etc/services).

Some of them are related to OS components, example:

# lsof -i tcp |grep 59790
diaglogd 22974 root 1u IPv4 0x4031c40 0t0 TCP *:59790 (LISTEN)

...

dm_stape 23283 root 5u IPv4 0x44695c0 0t15229 TCP localhost:59834->localhost:59792 (ESTABLISHED)


(these are online diagnostics processes).

[Srimalik]

try:
netstat -ap

This works under linux.

[Tim Nelson]

unless you specifically put a name for this service in the /etc/servicees file your only option is a enhancement product.

lsof is the most common and works great. Delivered on HPUX IExpress CDs or via software.hp.com