java.net.ConnectException: Connection timed out: no further information

Unable to connect to certain 1.7.2 servers, at any time. This doesn't affect all servers, and seems to be this connection specifically, as I've tried it on a Mac (Mac OSX Snow Leopard, Java 32-bit Update 7 version 45) and it gave me a similar error, io.netty.ConnectException: Connection timed out: no further exceptions.

I know that the server works, as I am actively talking with people who are using the server, trying to help me get on.

This is the output in the Development console when the connection fails.

[12:46:53 INFO]: Client> [12:46:53] Server Connector #1/ERROR: Couldn't connect to server
[12:46:53 INFO]: Client> java.net.ConnectException: Connection timed out: no further information: /*.*.*.:****
[12:46:53 INFO]: Client> at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method) ~[?:1.7.0_45]
[12:46:53 INFO]: Client> at sun.nio.ch.SocketChannelImpl.finishConnect(Unknown Source) ~[?:1.7.0_45]
[12:46:53 INFO]: Client> at io.netty.channel.socket.nio.NioSocketChannel.doFinishConnect(NioSocketChannel.java:191) ~[netty-all-4.0.10.Final.jar:?]
[12:46:53 INFO]: Client> at io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:228) ~[netty-all-4.0.10.Final.jar:?]
[12:46:53 INFO]: Client> at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:497) ~[netty-all-4.0.10.Final.jar:?]
[12:46:53 INFO]: Client> at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:447) ~[netty-all-4.0.10.Final.jar:?]
[12:46:53 INFO]: Client> at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:341) ~[netty-all-4.0.10.Final.jar:?]
[12:46:53 INFO]: Client> at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:101) ~[netty-all-4.0.10.Final.jar:?]
[12:46:53 INFO]: Client> at java.lang.Thread.run(Unknown Source) ~[?:1.7.0_45]