Reaction of a host after receiving "port unreachable" icmp error msg?

Discussion in 'Linux Networking' started by kajax01, Nov 20, 2013.

  1. kajax01

    kajax01 New Member

    Messages:
    5
    Likes Received:
    1
    Trophy Points:
    3
    Hi,

    Does anyone know how a host has to react when receiving an icmp error "port unreachable" say from a contacted dns server? My proxy continues asking this server every 6-10 ms quite many times.
    Shouldn't it know that port 53 is unreachable and at least not try again and again every few ms?


    It's a RedHat 5.7.
    Thanks
  2. ryanvade

    ryanvade Administrator Staff Member Staff Writer

    Messages:
    889
    Likes Received:
    288
    Trophy Points:
    63
    I would imagine that there is a "Max Retry" setting somewhere. Perhaps it is set too high?
  3. kajax01

    kajax01 New Member

    Messages:
    5
    Likes Received:
    1
    Trophy Points:
    3
    Thanks @ryanwade!
    Unfortunately I couldn't find something similar.
    And udp has much less parameters to configure, I think.

Share This Page