Why don't my proxies work anymore?
September 23, 2009 5:08 PM Subscribe
Why have my proxies (Privoxy and GAppProxy) suddenly quit working? I'm using an up-to-date Vista installation.
I use proxies periodically to get past China's Great Firewall. In the past, a strategy of Tor (by means of Vidalia/Privoxy/Torbutton) and GAppProxy (through FoxyProxy, set up using these instructions). I never use the two at the same time, i.e. if I'm using Tor, I'm not using GAppProxy, and vice versa. When I was last in China, in July, I had been using this setup for a few months with no problems.
I've just returned to China, and after a day or two of flawless operation, both proxies have quit working. To clarify, both proxy setups manage to get past the Great Firewall and transfer data. However, within a few seconds of data transfer through the proxy, I get a message from windows stating, "Privoxy has stopped working" or "HTTP Proxy. 127.0.0.1:8000 has stopped working" in the case of GAppProxy. Privoxy is running on port 8118.
Restarting the computer or the proxies doesn't solve the problem. Running one without the other doesn't solve the problem. Is there a possibility that something other than my computer is causing the problem, perhaps new strategies used by the Great Firewall spike the proxy somehow? The proxies remain operational if they are not in use, which is to say, if I start Privoxy or GAppProxy and don't transfer data through them, the services run with no problem.
While I haven't installed any internet-using programs in the week I've been back in China, since I didn't use the proxies for two months while outside of China, I can't be sure that the problem is a result of new conditions.
How can I troubleshoot this problem?
I use proxies periodically to get past China's Great Firewall. In the past, a strategy of Tor (by means of Vidalia/Privoxy/Torbutton) and GAppProxy (through FoxyProxy, set up using these instructions). I never use the two at the same time, i.e. if I'm using Tor, I'm not using GAppProxy, and vice versa. When I was last in China, in July, I had been using this setup for a few months with no problems.
I've just returned to China, and after a day or two of flawless operation, both proxies have quit working. To clarify, both proxy setups manage to get past the Great Firewall and transfer data. However, within a few seconds of data transfer through the proxy, I get a message from windows stating, "Privoxy has stopped working" or "HTTP Proxy. 127.0.0.1:8000 has stopped working" in the case of GAppProxy. Privoxy is running on port 8118.
Restarting the computer or the proxies doesn't solve the problem. Running one without the other doesn't solve the problem. Is there a possibility that something other than my computer is causing the problem, perhaps new strategies used by the Great Firewall spike the proxy somehow? The proxies remain operational if they are not in use, which is to say, if I start Privoxy or GAppProxy and don't transfer data through them, the services run with no problem.
While I haven't installed any internet-using programs in the week I've been back in China, since I didn't use the proxies for two months while outside of China, I can't be sure that the problem is a result of new conditions.
How can I troubleshoot this problem?
Wild stab, but have there been any changes to your local antivirus since you last used it? This sounds like an over-aggressive AV or HIDS killing down a suspicious process.
posted by These Premises Are Alarmed at 5:32 PM on September 23, 2009
posted by These Premises Are Alarmed at 5:32 PM on September 23, 2009
Response by poster: Hmm..hadn't thought about the antivirus. Haven't made any changes to it, beyond the daily or so updates to the virus database. Using Avast. Tried disabling it, and the problem persists.
posted by msbrauer at 6:38 PM on September 23, 2009
posted by msbrauer at 6:38 PM on September 23, 2009
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Not much by the way of actual technical advice to offer though, I'm afraid.
posted by Abiezer at 5:25 PM on September 23, 2009