Networking issues - routers/switches etc

Joe 90 · 08-01-2009, 21:55

Evening.

Right, I'm a student, in halls. Our network is authenticated by MAC address. I currently run my PC and PS3 through a linksys switch.

The authentication on my port is limited to just these 2 (MACs) devices so I thought it'd be perfect to return after christmas with my DD-WRT powered linksys router.

I've changed the settings on my router so that the DNS/Gateway and subnet are those which the PC picks up when i'm connected through the switch. And then also got my router to clone my PC's MAC so that it is then authenticated.

So far so good I thought. after i'd done this the router got an external IP, and it filtered through and gave my PC internet access. Although this only lasted a few moments, then it went back to limited or no connectivity, like before i'd changed the settings.

I then thought powering down might help so turned off the PC, then power cycled the router, booted back up etc. still no joy. I also now can't even connect to my router (very odd, i know)

Just to test things out i booted up the wii and fired up the wireless search - no problems there. It found my router and the live connection, and connected to the web, downloaded a recent update and seemed happy enough. (router has been reset so wireless is unsecure atm)

So, it seems that when cabled up the router connects to the network and gets through to the internet and then is connectable via wireless, but not through the wired connection to the PC.

Anybody got any ideas what might fix, first off the fact that i can't connect to the router when thats plugged in? i can't understand that first off, and then the rest, i guess if the PC connects to it then it should pick up the net (from what happens with the Wii)

Mark · 09-01-2009, 00:05

If you unplug the external connection and reboot do you get access to the router back?

I'd be checking settings for things like internal IP/subnet, DHCP, firewall, etc.

Joe 90 · 09-01-2009, 00:31

yeah the router gets its connection back.

I assumed that DHCP between PC and router would sort out that LAN side of things but maybe not.
ESET popped up with a new network and i 'trusted' it so don't think that'd be the problem.

Mark · 09-01-2009, 00:34

Sounds like you may have disabled NAT or the local (in the router) DHCP server, so it's passing IP addresses through from the halls router. You don't want it doing that.

Joe 90 · 09-01-2009, 01:12

its working! jesus Christ i've done it!

really werid.
i'm not aware that i did anything different, simply slower.

I changed the same settings, to the same things, just happened to reboot the router after changing the dns/ip details and then cloned the MAC this time... and renewed the DHCP a few times after that. but anyway - its done!

thanks for the help

*and yeah, the first thing i did was create a backup from the router incase owt goes wrong!

08-01-2009, 21:55	#1
Joe 90 Absinthe Join Date: Jan 2007 Location: Chester Posts: 2,345	Networking issues - routers/switches etc Evening. Right, I'm a student, in halls. Our network is authenticated by MAC address. I currently run my PC and PS3 through a linksys switch. The authentication on my port is limited to just these 2 (MACs) devices so I thought it'd be perfect to return after christmas with my DD-WRT powered linksys router. I've changed the settings on my router so that the DNS/Gateway and subnet are those which the PC picks up when i'm connected through the switch. And then also got my router to clone my PC's MAC so that it is then authenticated. So far so good I thought. after i'd done this the router got an external IP, and it filtered through and gave my PC internet access. Although this only lasted a few moments, then it went back to limited or no connectivity, like before i'd changed the settings. I then thought powering down might help so turned off the PC, then power cycled the router, booted back up etc. still no joy. I also now can't even connect to my router (very odd, i know) Just to test things out i booted up the wii and fired up the wireless search - no problems there. It found my router and the live connection, and connected to the web, downloaded a recent update and seemed happy enough. (router has been reset so wireless is unsecure atm) So, it seems that when cabled up the router connects to the network and gets through to the internet and then is connectable via wireless, but not through the wired connection to the PC. Anybody got any ideas what might fix, first off the fact that i can't connect to the router when thats plugged in? i can't understand that first off, and then the rest, i guess if the PC connects to it then it should pick up the net (from what happens with the Wii) __________________ 360 Blog \| Join GiffGaff \| Twitter

09-01-2009, 00:31	#3
Joe 90 Absinthe Join Date: Jan 2007 Location: Chester Posts: 2,345	yeah the router gets its connection back. I assumed that DHCP between PC and router would sort out that LAN side of things but maybe not. ESET popped up with a new network and i 'trusted' it so don't think that'd be the problem. __________________ 360 Blog \| Join GiffGaff \| Twitter

09-01-2009, 01:12	#5
Joe 90 Absinthe Join Date: Jan 2007 Location: Chester Posts: 2,345	its working! jesus Christ i've done it! really werid. i'm not aware that i did anything different, simply slower. I changed the same settings, to the same things, just happened to reboot the router after changing the dns/ip details and then cloned the MAC this time... and renewed the DHCP a few times after that. but anyway - its done! thanks for the help and yeah, the first thing i did was create a backup from the router incase owt goes wrong! __________________ 360 Blog \| Join GiffGaff \| Twitter Last edited by Joe 90; 09-01-2009 at 01:35.*

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09-01-2009, 00:05	#2
Mark Screaming Orgasm Join Date: Jul 2006 Location: Newbury Posts: 15,194	If you unplug the external connection and reboot do you get access to the router back? I'd be checking settings for things like internal IP/subnet, DHCP, firewall, etc.

09-01-2009, 00:34	#4
Mark Screaming Orgasm Join Date: Jul 2006 Location: Newbury Posts: 15,194	Sounds like you may have disabled NAT or the local (in the router) DHCP server, so it's passing IP addresses through from the halls router. You don't want it doing that.