range of Ports

vinaytp · 12-03-2009, 08:52 AM

Hi all..

My distribution is fedora 9 and RHEL 5.3 in both the systems port range is ...

Code:

[root@TEG Sample Scripts]# cat /proc/sys/net/ipv4/ip_local_port_range 
32768	61000

This indicates local port range that is used by TCP and UDP traffic to choose the local port.

Why it wont start from 1 ? why it is starting from 32768 and ends at 61000 any reason ?

Thanks in advance...

rweaver · 12-03-2009, 09:13 AM

The lower numbered ports are typically reserved for specific uses by internet standards, the high ports typically aren't. Usually only root can start a process that opens on a port below ~1000.

Web31337 · 12-03-2009, 09:30 AM

below 1024, if to be clear.

chrism01 · 12-03-2009, 05:38 PM

See the /etc/services file for a mapping of 'IANA well known ports' to service names.