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Connection problem
http://prod.lifein19x19.com/viewtopic.php?f=24&t=4099		 Page 1 of 1
Author:  jts [ Wed Jun 22, 2011 8:34 am ]
Post subject:  Connection problem
The other day I was fooling around with ways to configure my internet connection and accidentally set the whole system (Ubuntu) to go through Privoxy for a few seconds. I reverted it a moment later, and everything was fine... except for Cgoban, which gives the following error from Java when I try to connect:

Security Exception
Name: CGOban 3

java.net.MalformedURLException : unknown protocol : socket

--------Details:
java.net.MalformedURLException: unknown protocol: socket
at java.net.URL.<init>(URL.java:574)
at java.net.URL.<init>(URL.java:464)
at java.net.URL.<init>(URL.java:413)
at java.net.URI.toURL(URI.java:1081)
at com.sun.deploy.net.proxy.DeployProxySelector.connectFailed(DeployProxySelector.java:208)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:384)
at java.net.Socket.connect(Socket.java:529)
at java.net.Socket.connect(Socket.java:478)
at java.net.Socket.<init>(Socket.java:375)
at java.net.Socket.<init>(Socket.java:189)
at cZ.a(cgoban:72)
at cP.a(cgoban:66)
at cQ.run(cgoban:215)
at java.lang.Thread.run(Thread.java:662)


--------Leading to this error from CGoban:
Error "Can't connect to SOCKS proxy:Connection refused" while connection to machine "goserver.gokgs.com"

Now, I can't figure out where the heck this is being stored. I reinstalled both Sun Java and the shared Java components. I also downloaded a fresh jnlp, although I don't think that could possibly matter. Any other thoughts on what I should try?
Author:  Kirby [ Wed Jun 22, 2011 8:59 am ]
Post subject:  Re: Connection problem
Is the port correct? Does the applet work?

On a side note, this type of connection problem is so much more boring than connection problems on the go board.
Author:  oren [ Wed Jun 22, 2011 9:26 am ]
Post subject:  Re: Connection problem
Kirby wrote:

On a side note, this type of connection problem is so much more boring than connection problems on the go board.


I don't know, I've had some very interesting connection problems of this nature for work before. :)
Author:  jts [ Wed Jun 22, 2011 10:34 am ]
Post subject:  Re: Connection problem
The port is 2379... I'm not able to find documentation for what it's supposed to be,
Author:  jts [ Wed Jun 22, 2011 10:34 am ]
Post subject:  Re: Connection problem
and as for applets, I was never able to get the applet to work on my ubuntu laptop.
Author:  Kirby [ Wed Jun 22, 2011 10:55 am ]
Post subject:  Re: Connection problem
2379 is the correct port. Maybe you're blocking that port.

I can try to see what you can do when I get home, but in the meantime, you might try using nmap. I think that would work to see if something is being blocked.

Try something like:
Code:
nmap -p 2379 goserver.gokgs.com


Though, again, I haven't tested if this is the precise syntax, so I don't know if this will work even if you're not blocking the port. I can try to get you more information when I get home today.
Author:  Kirby [ Wed Jun 22, 2011 11:01 am ]
Post subject:  Re: Connection problem
And by the way, if it does turn out that that port is being blocked, I know that http tunneling works to get you connected. I've done this before at a library where the port was blocked on the wifi... Though, I wonder if there's still a remnant problem from Privoxy.

When you say you "reverted it", what do you mean by this?
Author:  Kirby [ Wed Jun 22, 2011 11:05 am ]
Post subject:  Re: Connection problem
Another thing to try:

Code:
semanage port -a -t tor_port_t -P tcp 2379


This is just something I found online. I have never used "semanage" before, so again, I'm not sure if this will work.
Author:  Kirby [ Wed Jun 22, 2011 11:09 am ]
Post subject:  Re: Connection problem
This discussion is getting me into the mood to start using linux, again.
Author:  wms [ Wed Jun 22, 2011 11:29 am ]
Post subject:  Re: Connection problem
No clue. Something broke, but what?
Author:  jts [ Wed Jun 22, 2011 11:36 am ]
Post subject:  Re: Connection problem
I wanted Chrome to use privoxy, so I went to preferences>under the hood> change proxy settings. Originally it was set to "direct network connection"; I set it to "manual proxy", gave it the port for privoxy, and clicked "apply". When the success dialogue came up to tell me that I had changed the settings for my entire system, I changed it back to "direct network connection."

(I realize now that the "change proxy setting" button in chrome calls up the system proxy settings interface. Which is pretty misleading.)
Author:  Kirby [ Wed Jun 22, 2011 11:44 am ]
Post subject:  Re: Connection problem
Maybe try checking your network proxy settings by a different means...?

Does this work: http://www.techmetica.com/howto/setup-a ... in-ubuntu/?
Author:  jts [ Wed Jun 22, 2011 12:05 pm ]
Post subject:  Re: Connection problem
So what I was saying is: you can't change Chrome's proxy setting's specifically, Chrome just redirects you the system-wide settings.

I don't think it's Java's fault. I selected Vuze just to check, and Vuze didn't seem to have any trouble connecting to the internet.
Author:  Kirby [ Wed Jun 22, 2011 12:09 pm ]
Post subject:  Re: Connection problem
jts wrote:
So what I was saying is: you can't change Chrome's proxy setting's specifically, Chrome just redirects you the system-wide settings.

I don't think it's Java's fault. I selected Vuze just to check, and Vuze didn't seem to have any trouble connecting to the internet.


Interesting. The thing that strikes me is that, if you could connect to kgs via cgoban prior to changing proxy settings, and now you cannot connect to kgs, it appears that your computer is in a different state than it was before making the change to the settings. That's kind of why it seems natural to try to find a means to ensure that you have undone whatever you did before.
Author:  jts [ Wed Jun 22, 2011 12:12 pm ]
Post subject:  Re: Connection problem
I agree! :) I just can't think what those means would be.
Author:  wms [ Wed Jun 22, 2011 12:33 pm ]
Post subject:  Re: Connection problem
Try running "javaws" standalone from a command line. There are network proxy settings there. Maybe they got mangled?
Author:  jts [ Wed Jun 22, 2011 1:57 pm ]
Post subject:  Re: Connection problem
I wasn't able to access a gui or anything by running javaws, but

javaws -updateVersions -Xclearcache

fixed the problem. Case closed! Thanks for your help, wms.
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