IRC log from #github on Freenode; I have a *really* weird error, as documented here.

Github_Pages_weird_error.txt

evaryont        Is it just me or is github.com/*/ resulting in GithubPages saying "Page does not exist!" gist.github.com works, but no subfolders work under github.com/
evaryont	No matter what URL I try accessing under github.com/, it always results in a github pages non existent error
@defunkt	evaryont: like what url, for example?
bringo		i ain't not getting no 404s
evaryont	defunkt: ah, sorry, github.com/blog/ or github.com/evaryont/
evaryont	it's weird as hell, I realize, and my desktop works just fine >_<
bringo		strange. those URLs produce perfectly fine results for me.
bringo		i blame Echelon
context		evaryont: try clearing your cache?
context		make sure you are not using ie?
evaryont	lol no
evaryont	in *nix
evaryont	FF 3.0
bringo		do you go through proxies?
evaryont	cache cleared, no luck
evaryont	no proxies either
bringo		uhm next thing is to look at the actual response headers.
bringo		have you tried curl?
bringo		or wget? same result?
evaryont	nope, neither, will do
evaryont	curl results in the github pages page
evaryont	oh?
bringo		can you telnet to a slicehost or some other machine and do a curl or wget from there? if you get the same failure there... i am afraid the problem is 'you'. :)
evaryont	wget -O- github.com #=> 403 forbbidden (blah sp)
evaryont	curl from remote server: Sucess, get normal home page
womble		That sounds like your local machine is b0rked
evaryont	it seems, my ISP-assigned IP is blocked...
bringo		or your local internets provider is doing something nasty with the tubes.
evaryont	curl -I on either machine: local gets 403, remote server gets 200
bringo		still would be worth looking at the response headers to see what is in there.
evaryont	bringo: um, not much.
evaryont	Server, Date, Content-{Type,Length}, Connection  says curl
womble		I'm pretty sure there should be a lot more headers than that in there
evaryont	on my laptop here, using a direct connection through ISP.
bringo		and you are getting back 403 forbidden ... hmm
evaryont	when I connect via my remote server, I get those + Cookie, X-Runtime, Cache-control, ETag
evaryont	well, Set-Cookie, but w/e.
bringo		without actually knowing what the github crew does, I am assuming they are blocking your IP address for legacy reasons. is your ISP giving you IPs out of a pool or do you have a static?
evaryont	pool/dynamic
evaryont	so yeah... lucky me :P
bringo		maybe cycle the modem and see if you get a luckier IP address?
evaryont	can't
evaryont	shared network
evaryont	couple big d/ls going now
evaryont	hmmm
bringo		then i suggest you proxy through something... like a slicehost instance.
evaryont	here's a funny thing
evaryont	it works on my Windows computer just fine
evaryont	I can browse alright
bringo		just setup a little ssh tunnel :)
evaryont	lol yea
evaryont	hm...how do tunnels work? On a conceptual level. If I wanted to get around port blocking, how does tunneling avoid it? (in one scenario)
shadowhand	evaryont: a tunnel sends traffic for for HostA:PortX to HostB:PortY, which then sends the traffic out to HostA:PortX from HostB
bringo		just like a proxy would
context		evaryont: its just what it sounds like, it creates a listening port wherever, that tunnels the traffic to another box, which then forwards that to the final destination
evaryont	it...doesn't work?
shadowhand	evaryont: yes, a tunnel is a proxy for a specific port
evaryont	yet, the tunnel is configured properly
evaryont	and it still shows the github pages non existent page? wtf? o_o
bringo		now is a good time to get up, get a cup of coffee, browse a magazine for minutes and then sit back down and look at the problem again. :)
evaryont	what is the ssh command supposed to be?
evaryont	bringo: lol
evaryont	a yup.
evaryont	got the tunnel working now
evaryont	except github redirects me...which doesn't follow the tunnel >_<
evaryont	anw, thanks for the help
evaryont	a reboot doesn't even help...I do hate this lil' laptop atm. sigh.