[CentOS] Cannot open port 631 for Cups printer sharing

Roger Wells ROGER.K.WELLS at saic.com
Mon Mar 2 16:50:20 UTC 2009


JohnS wrote:
> On Mon, 2009-03-02 at 11:20 -0500, b.j. mcclure wrote:
>   
>> 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. ;-/
>>     
>
> Do you have the Cups Service running? service cups status and service
> hplip status.
>
>   
I don't have an answer but I have to believe that your problem
is related to mine (thread: cups & hp-toolbox)
my machine: Linux rwells-rh 2.6.18-92.1.22.el5 #1 SMP Tue Dec 16 
12:03:43 EST 2008 i686 i686 i386 GNU/Linux
[root at rwells-rh legacydp]# /sbin/service hplip status
hpiod (pid 6422) is running...
hpssd (pid 6427) is running...

[root at rwells-rh legacydp]# /sbin/service cups status
cupsd (pid 6453) is running...

10.40.90.14 is my IP address
[roger at rwells-rh legacydp]$ nmap -sT -p 631 -PT 10.40.90.14

Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2009-03-02 11:34 EST
Interesting ports on rwells-rh (10.40.90.14):
PORT    STATE  SERVICE
631/tcp closed ipp

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

Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2009-03-02 11:47 EST
Interesting ports on localhost.localdomain (127.0.0.1):
PORT    STATE SERVICE
631/tcp open  ipp

Nmap finished: 1 IP address (1 host up) scanned in 0.017 seconds

I hope that there are some clues here
> JohnStanley
>
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>   

-- 
Roger Wells, P.E.
SAIC
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Newport, RI 02840
401-847-4210 (voice)
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roger.k.wells at saic.com



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