* Mark Andrews <ma...@isc.org> [2012-07-18 07:43:34 +1000]: > > In message <20120717194840.GA3773@glasya2>, nex6 writes: > > when does bind or dns in general use tcp and when does it use udp? > > When it needs to. TCP support is NOT optional. > > > from what i have read, from the client intial request if under 512b > > come in on UDP port 53, if and depending on the local > > resolver in needs to retry it *could* be a tcp port 53 request? > > > > now thats client to name server; > > > > > > what about, recursive lookups? or forwarded requests? etc > > It's still client to server. Recursive servers have a client side > and a server side. > > > how does that work? > > Exactly the same why. > > > -Nex6
Thanks for the reply, i have an internal client with there own NS that is blocking TCP port 53, and complaining of random issues. like our NS not sending them traffic randomly..... I told them to unblock port 53 tcp.... then call me.... > > > > > > _______________________________________________ > > Please visit https://lists.isc.org/mailman/listinfo/bind-users to > > unsubscribe from this list > > > > bind-users mailing list > > bind-users@lists.isc.org > > https://lists.isc.org/mailman/listinfo/bind-users > -- > Mark Andrews, ISC > 1 Seymour St., Dundas Valley, NSW 2117, Australia > PHONE: +61 2 9871 4742 INTERNET: ma...@isc.org _______________________________________________ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
