#1541 Name resolution failure

3.0.19
closed
5
2013-01-28
2013-01-25
Chris
No

My Computer Setup:
Windows XP sp2
Kerio Personal Firewall v2.15
Sandboxie v3.46
Privoxy v3.0.19
Opera v11.64 and Firefox latest ver.

When I use Firefox or Opera with Privoxy, then I very often get a 404 message "can not Resolve ..." and can not be browsed further on the web. Nor can I get a website by entering an IP address in my web browser.
I can do a ping on the IP address, but not a ping on the name.
The connection can not be repaired with Windows repair options, so to solve the problem temporarily, there is only one thing to do and that is to restart the computer.

Someone who can tell precist what the problem was and how Web browsers, Privoxy and Windows Services must be set to avoid the error.

Discussion

  • Ian Silvester

    Ian Silvester - 2013-01-25

    Hi,

    At first sight, this would seem to be a DNS issue and nothing to do with Privoxy or the web browser; that is to say the configuration of Domain Name Resolution is broken such that domain names cannot be mapped to IP addresses. I presume when you ping domain names it returns an error to the effect that "could not resolve domain" or similar?

    I am unfamiliar with Sandboxie but a brief look at it's web site suggests that it might be the cause. At the very least, of the software you list this sticks out as the only one that might break DNS. Between restarting your PC and the problem reoccurring what change do you make/software do you run?

    Ian

     
  • Ian Silvester

    Ian Silvester - 2013-01-25
    • assigned_to: nobody --> diem
    • milestone: --> 3.0.19
    • status: open --> pending
     
  • Ian Silvester

    Ian Silvester - 2013-01-25
    • summary: Problems with Privoxy. --> Name resolution failure
     
  • Chris

    Chris - 2013-01-25

    Hi Ian

    I doubt it has anything to do with Sandboxie, since the problem only occurs when I use Privoxy.

    The problem may occur even if I have only used web browser and the said software since I restarted the computer.

     
  • Chris

    Chris - 2013-01-25
    • status: pending --> open
     
  • Ian Silvester

    Ian Silvester - 2013-01-25
    • status: open --> pending
     
  • Ian Silvester

    Ian Silvester - 2013-01-25

    I see, but can we be clear; does the problem arise the _moment_ you configure the browser to use Privoxy as a proxy and the goes away as soon as you remove the proxy setting the browser uses? IIRC both Firefox and Opera configure proxies within their own settings rather than using WIndow's built-in proxy configuration in Internet Options.

    It would be useful also if you could enable debug levels 1, 2, 4,16, 128 ,1024, 8192 & 65536 in the config file (see http://config.privoxy.org/user-manual/config.html#DEBUGGING for details) and send the resulting log file when you browse to a sample URL via domain name and then via IP address.

    Ian

     
  • Ian Silvester

    Ian Silvester - 2013-01-25

    Oh, and does the issue affect Internet Explorer as well?

    I'm also curious; Privoxy intercepts only the HTTP and HTTPS protocols, so once this issue arises and ping to domain names fails whilst ping to IP addresses still works it cannot be Privoxy that is causing this failure.

    Ian

     
  • Chris

    Chris - 2013-01-27

    Hi Ian and thanks for your response.

    You're right, it has probably nothing to do with Privoxy, since the problem disappears as soon as I close my firewall program, which was not obvious since I have been using the same Firewall and rules therein the last 7 years. I think it's my settings for ICMP is causing the problem. Why it occurs now and just coincides with that I try Privoxy, I could not say, but there must have been some changes to the way transport of data on the net that gives the problem

    Since it probably has nothing to do with Privoxy, then I will close the thread / post.

    Greetings
    Flemming

     
  • Chris

    Chris - 2013-01-27
    • status: pending --> open
     
  • Ian Silvester

    Ian Silvester - 2013-01-28

    Thanks for the followup Flemming,

    Hope you track down the firewall rule that's the issue - perhaps your DNS provider changed their implementation?

    I'll close the ticket,

    Ian

     
  • Ian Silvester

    Ian Silvester - 2013-01-28
    • status: open --> closed
     

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No, thanks