[CentOS] Cannot open port 631 for Cups printer sharing

Scott Silva ssilva at sgvwater.com
Mon Mar 2 19:56:39 UTC 2009


on 3-2-2009 11:22 AM JohnS spake the following:
> On Mon, 2009-03-02 at 11:14 -0800, Scott Silva wrote:
>> on 3-2-2009 8:20 AM b.j. mcclure spake the following:
>>> I have been trying to set up printer sharing on the LAN.All machines are
>>> CentOS 5.2 fully updated. The problem server is a fresh build.  The box
>>> it is replacing worked fine for many months.
>>> The problem appears to be a closed port 631 on the new box.  iptables
>>> and ip6tables are stopped as shown by the output below.  To confirm I
>>> was using nmap correctly I ran it against the old server first which
>>> shows 631 open.  No matter what I do to the new box (192.168.2.205) 631
>>> remains closed.  I was running it on the new box via ssh which I think
>>> eleminates any swithc/router issues.
>>>
>>> Any thoughts gladly accepted.  This must be something simple/stupid I
>>> have overlooked.  Not much hair left to pull out. ;-/
>>>
>>
>> Cups defaults to only being open on localhost. You have to edit the config
>> file to open more up.
> Qouted by me earlier:
>> Interesting that when the local host address is used the port is open:
>> [root at rwells-rh legacydp]# nmap -sT -p 631 -PT 127.0.0.1
> """It is configured by default to it has to be changed"""  # Maybe they
> did not understand my wording of it? Should have said It has to be
> changed for networking.
> Posted a working networkable config also and linked the cups site also
> JohnStanley
Yeah... I saw your postings, but they were further down the thread as I was
catching up this morning. Unfortunately, I had already sent my "2 cents"
before I got down that far.

-- 
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You hope everybody uses it, and
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