Is it possible, bind has done but the OS still respond with ICMP destination unreachable

Discussion in 'Linux Networking' started by Bin Chen, Mar 27, 2007.

  1. Bin Chen

    Bin Chen Guest

    Hi,

    I encounter a problem seems strange. I ran ser(a open source SIP
    server) which binds to the port 5060. After the system starting up, I
    can see aparently that the ser has successfully bind to UDP 5060. But
    when other machine send packets to 5060(UDP), the OS responds it with
    ICMP error(destination unreachable, port unreachable), any other
    possibilities will cause this?

    I am using ubuntu 6.10.

    Thanks in advance.

    abai
     
    Bin Chen, Mar 27, 2007
    #1
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  2. Bin Chen

    Bin Chen Guest

    If a program first does a bind, and then it enter a dead loop, will
    the OS find the binder has dead and respond a ICMP error?
     
    Bin Chen, Mar 27, 2007
    #2
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  3. I encounter a problem seems strange. I ran ser(a open source SIP
    You shouldn't be saying "apparently". Run netstat -ltu and see what it
    *has* bound to.
     
    Allen McIntosh, Mar 28, 2007
    #3
  4. Bin Chen

    Bin Chen Guest

    Sure, I have checked this and see the binding.
     
    Bin Chen, Mar 29, 2007
    #4
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