DNS forwarders

Discussion in 'Windows Desktop Systems' started by fixitchris, Dec 12, 2007.

  1. fixitchris

    fixitchris OSNN Junior Addict

    Messages:
    12
    Hello,

    I have two ISPs coming into my building, cable and dsl. The dsl is a backup line. Today the cable line failed and dsl picked up the work. however, nslookup, run on client or server, did not reliably resolve domain names. I have four forwarders set up:
    CABLE DNS1
    DSL DNS1
    CABLE DNS2
    DSL DNS2

    It seemed like since the first one failed that our DNS server did not continue with any other forwarders... I had to rearrange them:
    DSL DNS1
    DSL DNS2
    CABLE DNS1
    CABLE DNS2

    to get nslookup to work.

    Any ideas?
     
  2. LordOfLA

    LordOfLA Godlike!

    Messages:
    7,027
    Location:
    Maidenhead, Berkshire, UK
    is it windows by any chance? This is a common issue with it's dns client.

    I'd suggest a linux/bsd machine or virtual machine (innotek virtualbox is free and comparible to vmware) with something like dnscache running for the LAN and use that instead.

    Alternatively take a look at opendns.org(com?) and setup your dns server to use those instead.