How to still using DNS even when switch the proxy in Mozilla Firefox?

07
2014-07
  • Iury Simões

    I'm using some DNS on my connection on Ubuntu 14 and then I want to still using it even I switch the proxy on foxyproxy. Can I do it?

    • Answers
  • irezvin

    If you use Google's DNS, 8.8.8.8, for example, try this one: Advanced >> Network >> Connections >> No Proxy for: 8.8.8.8

    see more here: https://developer.mozilla.org/en/docs/No_Proxy_For_configuration

  • BjornR1989

    The behaviour of DNS is different for different types of proxies.

    In case of an HTTP proxy: Your HTTP request is sent to a HTTP proxy server which resolves the domain. Since the proxy is forwarding the request to the actual destination server, only it needs to know the real IP of the destination host.

    In case of a SOCKS proxy: Firefox (by default) resolves DNS locally but it can be forced to resolve DNS trough a SOCKS proxy by entering about:config in the address bar and enabling the setting "network.proxy.socks_remote_dns".


    • Related Question

    ssh - How to do DNS through a proxy in Firefox?
  • Questioner

    I am using Firefox 3.5.7 with FoxyProxy. I have an ssh tunnel forwarding 8080 through to an HTTP proxy server on the other end. With FoxyProxy, I send work traffic direct but everything else goes through the proxy server. DNS lookups, though, still go to work's DNS servers for resolution. Is there an add-on that can funnel certain DNS traffic to the OS but shove everything else through my ssh tunnel? It's a long shot, but it never hurts to ask....


    • Related Answers
  • Nick Kavadias

    1. In firefox type this in your address bar:

      about:config

    2. Click that you promise to be careful.

    3. In the filter textbox, type: proxy

    4. Find the preference name called *network.proxy.socks_remote_dns*. Double click it to set it to true.

    Firefox will now proxy DNS requests instead of trying to resolve them locally.

  • herrtodd

    Configure your ssh client to do Dynamic forwarding (-D flag on the openssh client) so that it acts like a SOCKS server. Then you can do remote DNS lookups via SOCKS. A straight up HTTP proxy doesn't support what you want.

    FoxyProxy has info on how to do what you want with SOCKS. Privoxy is another good option, too.