Cannot verify username! Unknown host exception. ERROR

Hey, It's frozenintime here. My server got some kind of strange error, I tried alot of stuff to fix it, but nothing worked. Anyone who'd like to help?

Well, first of all, when I'm logging into the server, this is what I get: "Failed to verify username! [internal error.java.net.UnknownHostException: Session.minecraft.net]"

And when I go through the log, I see this in the middle of the start-up: "
14:16:42 [INFO] Preparing level "Blockworld"
14:16:42 [INFO] Preparing start region for level 0 (Seed: 1168741440398635513)
14:16:43 [INFO] Preparing spawn area: 93%
14:16:44 [INFO] Preparing start region for level 1 (Seed: 992795521643728851)
14:16:44 [INFO] Preparing spawn area: 36%
14:16:45 [INFO] Preparing start region for level 2 (Seed: 992795521643728851)
14:16:45 [INFO] Server permissions file permissions.yml is empty, ignoring it
14:16:45 [INFO] Done (3,290s)! For help, type "help" or "?"
14:16:56 [WARNING] Could not get information about this CraftBukkit version; per
haps you are running a custom one?: UnknownHostException
14:16:56 [WARNING] Could not get latest artifact information: UnknownHostExcepti
on"

When someone tries to log onto my server, this is wat I get from the CONSOLE:
14:27:59 [INFO] Disconnecting TehNewJesus [/IPORT]: Failed to verify
username! [internal error java.net.UnknownHostException: session.minecraft.net]

14:27:59 [SEVERE] java.net.UnknownHostException: session.minecraft.net
14:27:59 [SEVERE] at java.net.AbstractPlainSocketImpl.connect(Unknown Sour
ce)
14:27:59 [SEVERE] at java.net.PlainSocketImpl.connect(Unknown Source)
14:27:59 [SEVERE] at java.net.SocksSocketImpl.connect(Unknown Source)
14:27:59 [SEVERE] at java.net.Socket.connect(Unknown Source)
14:27:59 [SEVERE] at java.net.Socket.connect(Unknown Source)
14:27:59 [SEVERE] at sun.net.NetworkClient.doConnect(Unknown Source)
14:27:59 [SEVERE] at sun.net.www.http.HttpClient.openServer(Unknown Source
)
14:27:59 [SEVERE] at sun.net.www.http.HttpClient.openServer(Unknown Source
)
14:27:59 [SEVERE] at sun.net.www.http.HttpClient.<init>(Unknown Source)
14:27:59 [SEVERE] at sun.net.www.http.HttpClient.New(Unknown Source)
14:27:59 [SEVERE] at sun.net.www.http.HttpClient.New(Unknown Source)
14:27:59 [SEVERE] at sun.net.www.protocol.http.HttpURLConnection.getNewHtt
pClient(Unknown Source)
14:27:59 [SEVERE] at sun.net.www.protocol.http.HttpURLConnection.plainConn
ect(Unknown Source)
14:27:59 [SEVERE] at sun.net.www.protocol.http.HttpURLConnection.connect(U
nknown Source)
14:27:59 [SEVERE] at sun.net.www.protocol.http.HttpURLConnection.getInputS
tream(Unknown Source)
14:27:59 [SEVERE] at java.net.URL.openStream(Unknown Source)
14:27:59 [SEVERE] at net.minecraft.server.ThreadLoginVerifier.run(ThreadLo
ginVerifier.java:32)
14:27:59 [INFO] TehNewJesus [/IPORT] lost connection



Adittional info:
I deleted all my plugins, and the same thing pops up. (This means, it's nothing to do with my plugins)
I tried all kinds of Developement builds, recommended builds, etc for 1.3.1. Same thing pops up.

That was all. PLEASE HELP!

 

Obviously, your server can't reach any other server on the interwebz. Both errors are basically the same - java couldn't connect to an outside server, for example the auth check with minecraft.net

 

Would also help if you posted the OS your using.

Try pinging a domain on your server. If that fails, then theres a network problem.

 

zipfe what should I do then?
confuserr I can reach the server, go into the external desktop, but the minecraft server won't let me connect to it.

 

Sounds the same as this:
http://forums.bukkit.org/threads/minecraft-auth-login-help.92983/

 

I meant try running

PING minecraft.net

on your server, if that fails, then your server cannot access outside

 

confuserr so what you ment was to send this "PING minecraft.net" as a command from the CONSOLE?

 

Perhaps the Minecraft authentication servers are down again