How i can bypass proxy/firewall in .Net? preferably c#?

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  • Mahesh Devjibhai Dhola
    #1

    How i can bypass proxy/firewall in .Net? preferably c#?

    Can you please help me in my problem?

    I have a socket prog. application like
    Code Project
    http://www.codeproject.com/dotnet/csharpwhiteboard.asp
    Code Project - For Those Who Code


    My application is chat application like above architecture.

    I want to bypass firewall aswell as proxy if any on two chat clients like
    yahoo or msn can chat beyond proxy/firewalls...

    Please guide me, how i can do that...!

    Thanks,
    Mahesh Devjibhai Dhola
    "Empower yourself...."


    Tags: None
    • Peter Rilling
      #2
      Re: How i can bypass proxy/firewall in .Net? preferably c#?

      If you could bypass a firewall, then any program could and that would defeat
      the purpose of such protection. You would need to configure the firewall on
      both ends to allow your application to communicate with the outside world.

      "Mahesh Devjibhai Dhola" <mddhola@hotmai l.com> wrote in message
      news:uunEqyBHFH A.2456@TK2MSFTN GP09.phx.gbl...[color=blue]
      > Can you please help me in my problem?
      >
      > I have a socket prog. application like
      > http://www.codeproject.com/dotnet/csharpwhiteboard.asp
      >
      > My application is chat application like above architecture.
      >
      > I want to bypass firewall aswell as proxy if any on two chat clients like
      > yahoo or msn can chat beyond proxy/firewalls...
      >
      > Please guide me, how i can do that...!
      >
      > Thanks,
      > Mahesh Devjibhai Dhola
      > "Empower yourself...."
      >
      >[/color]


        Comment

        • DalePres
          #3
          Re: How i can bypass proxy/firewall in .Net? preferably c#?

          To bypass the firewall, you'll have to use a port that configured to pass
          through the firewall.

          Most, if not all, firewalls allow communications initiated locally. In
          other words, if a client sends a request to a server, then the response is
          expected by the firewall and should be sent to the client without blocking
          it. Only "listeners" should have to have their firewalls configured. That
          can be a single server or, in a peer to peer system, every user must listen.
          With that in mind, you have a couple options.

          If all messages are routed through a server before being forwarded to the
          recipient, then you shouldn't have any problem once you've configured the
          firewall at the server.

          If it is a true peer to peer chat system, then each client will have to
          "listen" on the inbound port and, therefore, each client will have to have
          its firewall configured to accept the incoming request from the other peer.

          HTH

          DalePres
          MCAD, MCDBA, MCSE


          "Mahesh Devjibhai Dhola" <mddhola@hotmai l.com> wrote in message
          news:uunEqyBHFH A.2456@TK2MSFTN GP09.phx.gbl...[color=blue]
          > Can you please help me in my problem?
          >
          > I have a socket prog. application like
          > http://www.codeproject.com/dotnet/csharpwhiteboard.asp
          >
          > My application is chat application like above architecture.
          >
          > I want to bypass firewall aswell as proxy if any on two chat clients like
          > yahoo or msn can chat beyond proxy/firewalls...
          >
          > Please guide me, how i can do that...!
          >
          > Thanks,
          > Mahesh Devjibhai Dhola
          > "Empower yourself...."
          >
          >[/color]


            Comment

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