Arch Linux

superchango

Member

From: Tenochtitlan

Registered: 2009-01-22

Posts: 133

There is an open port in my system always.

I'm using Mate, started with Slim, and all work perfect.

I'm configuring UFW like my firewall; i have no problems with it but when i test my system to find what open ports it has i always found one (it changes in each reboot) that it is being used by "mate-session". Is this normal?

Some points:

1.- To find open ports i run:

# nmap -T Aggressive -A -v 127.0.0.1 -p 1-65000

and it always report something like this (specific port change with each reboot):

Discovered open port 38587/tcp on 127.0.0.1
PORT      STATE SERVICE VERSION
38587/tcp open  unknown 

2.- To check what process are using open port i run:

# sudo lsof +M -i4

and it report something like this:

COMMAND   PID USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
dhcpcd    277 root    8u  IPv4  10038      0t0  UDP *:bootpc 
mate-sess 382 mono   11u  IPv4  10486      0t0  TCP *:38587 (LISTEN)

3.- And for know what process is:

$ ps -p 382 -o comm=
$ mate-session

I don't have any program in my startup session preferences that need internet access (only Mate defaults and Parcellite).

Is this something normal?

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ewaller

Administrator

From: Pasadena, CA

Registered: 2009-07-13

Posts: 19,823

Re: There is an open port in my system always.

I don't know about Mate, but is that port open only on 127.0.0.1, or is it also open on your IP?

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Gulver

Member

Registered: 2013-05-24

Posts: 208

Re: There is an open port in my system always.

It is probably your router connection and Mate, along with dhcpcd using it to manage your internet connection, if I'm not mistaken. Mine does always use two open ports on the address ewaller mentioned.

fungle

Member

Registered: 2014-05-01

Posts: 81

Re: There is an open port in my system always.

Fyi, 127.0.0.1 is the default address for localhost. Basically, it is the ip interface that your computer uses to talk to itself. It's not really a big deal as that ip address isn't open to the outside.