printer connection via modem

February 17, 2010 at 00:30:36
Specs: Windows XP
ok, here goes. firstly i do believe that i already have the gear needed for this so i don't want to spend more cash (if possible). printer is a commercial colour copier. computer 1 is directly connected (cat. 5 ethernet cable) to internet via modem. computer 2 is connected to printer via cat.6 cable into ethernet router then to printer (via cable). now although i have wireless capabilities i don't want to always have the 2nd computer on to be able to access the printer from computer 1, so hardwiring via cable is no problem, but as i only have a single RJ45 socket on computer 1 (which is taken by the modem) can i simply plug the cat.6 cable (of which i have an extra) into the RJ45 socket on the back of the modem then run to the ethernet router connected to the printer? if so what is the procedure?

thanks for any advice.


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February 17, 2010 at 07:44:49
Since you have a router, the correct setup is as follows:

highspeed modem >> router >> clients

That's with the modem plugging into the WAN port of the router and clients into the LAN ports. I am of course assuming you have a router with 4 LAN ports. If you have one that only has 1 LAN port you can always purchase a cheap 8 port switch to plug into the LAN port and then plug clients into the switch.

If you do it my way, then your network printer can be plugged into a LAN port on the switch and will be available to all LAN clients. You will of course want to statically assign an IP address to the printer that's outside the DHCP scope setup on the router. That will avoid any chance of duplicate IP's on the network.

Also, with my setup then your 2nd computer could also access the internet if you want it to. If you don't want your second computer accessing the internet simply statically assign and IP to it that is also outside the scope of the DHCP server on the router but leave the default gateway address empty. With no gateway address the PC will still be able to communicate with the network printer, and other clients, but will not be able to access the internet.

This also puts every LAN client behind the firewall.

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February 19, 2010 at 21:34:58
thanks Curt. i do have 4 port (1xWAN/4xLAN) router but have purchased a switch (8 port) because i dont want 2 cables (printer/computer 2) running thru office to router. still have problem 'talking' to printer though. so i have setup as follows:

router & modem located in reception next to computer 1.
switch located in office behind printer next to computer 2.
computer 1>router(LAN)>modem(WAN) / printer(LAN)>switch
computer 2>switch>printer

now, as this setup stands, i can connect to internet from computer 1 (sweet)
i can print from computer 2 (sweet)
i can't get computer 1 to print BUT if i directly connect the cable to computer 1 therefore bypassing the router i can get the printer working (obviously by adding tcp/ip port & assigning static ip) so it's when i connect to router that i'm getting stuck. you will have to excuse my ignorance on this, but i do enjoy the challenge.


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February 19, 2010 at 22:50:21
You should have the following connections.
Modem connects to WAN port of router.
PC1 connects to LAN port of router.
Cable runs from second LAN port of router to switch. ( Uplink port unless the switch has auto uplink sensing)

PC2 and printer each connect to switch.

With such a small network you may wish to disable DHCP in the router and manually assign static IPs to each PC and the printer. You would then need to run the printer install wizard in each PC to install a network printer.

This presumes the printer you have is a true network printer with inbuilt printserver. What make/model?

Goin' Fishin' (Some day)

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