[Discuss] CUPS Remote Printer

[DR]

Murray Strome wrote:
> John Blomfield wrote:
>> Murray Strome wrote:
>>> My main printer is an Okidata OL600e B&W LED printer which is 
>>> physically connected to my wife's printer.  Through new installs, 
>>> upgrades, etc. I have never really had to do much to have it 
>>> accessible to all my computers.  However, since re-installing Kubuntu 
>>> on my wife's computer, I cannot no longer access it.  I imagine that 
>>> it has something to do with my ability to access her computer. I have 
>>> not changed any settings in my routers. The simplified configuration is:
>>>
>>>
>>>    --------                   --------------- ----              
>>> --------------------
>>>   | router|------------- |  Computer 1  |----------|Okidata Printer|
>>>   |           |----             -------------------             
>>> --------------------
>>>   ----------     |
>>>                    |                          ---------------        
>>> ---- --------------               |  router #2 |------|  Computer 2 |
>>>         ----------------        --------------------   Of course, 
>>> there are other computers connected to router & router 2, and other 
>>> printers on both Computer 1 and Computer 2. The first router is 
>>> connected to a cable modem box, then to Shaw cable.
>>>
>>> All the computers used DHCP to get their addresses, as do the 
>>> routers.  I have changed Computer 1 to fixed address (one the router 
>>> originally assigned to it), but that did not make any difference.
>>>
>>> From Computer 2, I can ping router or Computer 1 (or anything else 
>>> connected on that router) from Computer 2. I can ping router 2 from 
>>> Computer 1 using the address "leased" to it by router, but I cannot 
>>> ping to Computer 2 from Computer 1.  I can connect to the internet 
>>> from everywhere without any problem.  If I try to add a network CUPS 
>>> printer in Computer 2, it cannot access Port 631 on the address 
>>> assigned to Computer 1 by router.
>>>
>> You need to open the router #2 firewall so that computer 1 can see 
>> computer 2.  It depends on the brand of router and its software how 
>> you do this.  Have a look and the firewall rules for router #2, it 
>> should have a menu item that allows you to do this.  As a last resort 
>> you could put Computer 2 in the DMZ (Demilitarized Zone) as it would 
>> still be protected by the other router.  Incidentally why do you need 
>> router #2 would not a switch do just as well unless it has to be 
>> secure from Computer 1 and the others on router?
>>
>> John Blomfield
> I am not sure HOW to open router #2 firewall so that computer #1 can see 
> computer 2. Router #2 is a Trendnet TEW-432BRP. I see a setting on the 
> Trendnet to enable DMZ but it wants a DMZ host IP; what would that be, 
> or is that what I should be doing?
> 
> The reason I am using router #2 is that two of my computers are in 
> another room, quite far from the cable modem.  I had run one ethernet 
> cable through the walls to that room, but it was enough of a chore to do 
> so that I did not want to run another one (besides, all the ports on the 
> first one were in use).  I tried to use a wireless card for the second 
> computer, which worked (sort of) on one of the computers if I used 
> Windows XP on it, but I could never get a very good signal, and I was 
> never able to get it working with LINUX.  There was a very good price on 
> the Trendnet (cheaper than another cable), and it did the trick without 
> any effort until now.
> 
> Murray

You might save yourself a lot of grief by replacing the second router 
with an unmanaged switch.  About $25.00  for an 8 port no-name brand.  I 
have 4 or 5 about my home for exactly the same reason as you put in the 
router.  It was easier to run one cable and then connect the switch to 
several machines than to run several cables.

Deid