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At home dhcp worked great, assigned me an IP, and I could access places on the network and the internet. However, on campus DHCP doesn't work at all. I tried running dhcpcd with combinations of -r and -S to no success. What should I do to get dhcp working on my campus network?
yes - spoofing the mac may work, and will rule it out. Registering the other mac is better - not good idea going to sysadmin with a tale of all the cracker tricks you've tried. Talking to sysadmin will be definitive... and solve the issue even if it ain't the mac address.
Shot in the dark:
Are you running 2.6.24.x where x < 4 ?
If so, is this a new problem since upgrading to 2.6.24.x?
If so, then upgrade to 126.96.36.199 - there was a fix in there relating to how the kernel sends DHCP DISCOVER, and it caused some dhcp servers to not hand out ip addresses.
Why would spoofing my MAC address be considered cracking?
I din't say that - I said that the sysadmin may frown upon it.
Spoofing a mac address is a cracking technique. It is used to gain you access where you would not otherwise be allowed.
I mean I'm supposed to have access to my campus network and I'm not being malicious.
From what was discussed, you are supposed to have access to your campus network from a registered computer. We may disagree with, even despise, that policy, but it is the one in place. At least, that was the speculation in previous posts.
While intent counts for a lot, the sysadmin may feel that you are circumventing campus IT security. You will probably find you have some contractual obligations concerning that and there are usually quite stiff penalties involved with breaking them.
Much better to let the sysadmin know what you want to do - it is certain that the issue has been considered.
I had sent an email to my sysadmin
Don't e-mail - do you have any idea how many emails these guys get each day? Go to that worthies office and bang on the door.
I felt optimistic, ran dhclient and it worked.
Perhaps the lease on the old machine's access expired. (Try the old machine.) Perhaps sysadmin got your email and did something after all? May be worth clearing up.
I had emailed him before and had gotten a timely response so I didn't see a reason to see him in person. I know he made at least one change, the instructions to register for linux is now a bash script instead of a .exe... Note that to register you first need to be connected to the LAN i.e. dhcp needs to be working.
So last night cable (tv + broadband) crashed for everyone in the area. Internet is currently up, and it works in my room (tested on friend's computer), but I can't connect on my slackware computer. The only thing I've changed in the interim is I commented out everything in /etc/inetd.conf. dhclient gives an error saying I'm already registered/have an address, so I don't think the problem is with that.
Grr, I'm really not sure what's wrong with my network connection. It intermittently stops working. When I try to ping I get an unknown hostname. When I run dhclient it tells me can't bind to dhcp address, address already in use. Ideas?