I have 3 domain names that I cannot resolve recursively from my DNS servers. The problem exists inside my institution and not from outside. I can resolve what I need just fine from a Broadband connection. One domain is bjmu.edu.cn, I cannot resolve the MX records (or any others for that matter). If I use "dig +norecurse ... ns" and start by looking up ".", then "cn.", then "edu.cn." etc using "@server" and trying each and every server at each level, it works.
I also have a problem with iop.kcl.ac.uk, again non-recursive queries all along the chain work a treat, but as soon as you do "dig iop.kcl.ac.uk" you get ";; connection timed out; no servers could be reached" like the one above. Finally I have an issue with ads.ahds.ac.uk, same error ";; connection timed out; no servers could be reached". This last one is complicated by the fact that just one of my DNS servers, the outward facing dns0.liv.ac.uk is a slave for this one, so it *can* resolve names in that domain. I have contacted the hostmasters at the various places that master these domains and they all confirm that they are working fine. I have tried debug mode and query logging on a recursive name server and get no useful clues, I just see the query and the fact that it times out. I have tried "+trace" on dig and that causes the queries to work! I am completely stumped... Is it my servers? If so what do I have to do to them? Any clues would be welcomed as I am going out of my tree with this! -- Barry Dean Network Programmer Computing Services Department University of Liverpool Email: B.Dean <at> liverpool.ac.uk, Web: http://pcwww.liv.ac.uk/~bvd/
