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Solaris 10: How to just open a port - nothing else

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Operating Systems Solaris Solaris 10: How to just open a port - nothing else
# 1  
Old 02-04-2014
Solaris 10: How to just open a port - nothing else

Hi there,

I tried just open a port but I failed ;-(

# telnet localhost 9876

That should work so I did ...

# vi /etc/services
myport      9876/tcp    # my port

# svcadm restart inetd

-> New pid, see ps - ef | grep inet

# netstat -an | grep 9876

No port 9876 is waiting ;(

# telnet localhost 9876

Also does not work

# ipfstat -io

Looks good

There are no log-Information. My question is simple and easy to solve in Linux but on Solaris I gave up. Who could help me?

Best wishes.

Last edited by bartus11; 02-04-2014 at 04:33 PM.. Reason: Please use [code][/code] tags.
# 2  
Old 02-04-2014
telnet on solaris is disabled by default, to enable it you must use svcadm command

as root issue

svcadm enable telnet

Be aware that telnet is non-secure application, everyone can listen your traffic. Use SSH instead. If your Solaris box doesn't have IPFilter enabled than all ports should be accessible.

To be sure, try to pause firewall using following command

svcadm disable ipf
# 3  
Old 02-04-2014
You should never edit /etc/services. It doesn't do what you think it does -- it's just a reference book for standard port numbers.

Just "opening a port" doesn't mean there's anything actually listening!
# 4  
Old 02-05-2014
What do you want to listen? There will be a standard process for attaining your goal, but you need to go about it the right way round.

You might have defined tcp port 9876 as label myport, but that doesn't mean anything. How is inetd supposed know what to do with it?

Is this an inetd managed service or something bespoke or 3rd party? You will need to start the deamon that will actually listen.

# 5  
Old 02-05-2014
Originally Posted by System
There are no log-Information. My question is simple and easy to solve in Linux but on Solaris I gave up.
- So how do you solve it under Linux ?
- What makes you think the port is closed in the first place ? i.e. what makes you think the firewall if any is involved ?

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