> From: Julian Opificius <[EMAIL PROTECTED]> <snip>
> Now, if you put a forwarder statement in your zone file, then your DNS > server will go to your ISP's DNS server(s) before trying to resolve an > address itself. Your ISP's DNS server has to do all the work. That's fine: > this will reduce the load on your machine's DNS server. Your DNS sever will > still cache the results, however. The forwarding statement only changes HOW > it goes about getting names resolved, it doesn't stop it from caching the > results. > > Now, on to forwarding. > Given the setup I was talking about in the first place was four machines on > a LAN, one of which was a Linbox running bind, there's no point in running > a DNS server in the first place if all I'm going to do is concentrate all > DNS request to the Linbox then pass them up to my ISP's DNS server, is > there? I might as well point each of my LAN workstations at my ISP's DNS > server and be done with it. They'd all go my ISP's server individually for > their answers. > > You see, in one of the references Dave made yesterday, it was claimed that > setting up a forwarding server reduces local network load. I assure you DNS > requests don't amount to a hill of beans on even a modest LAN, compared to > the actual data that is transferred once the address is resolved. Look at > the size of even a modest web page these days. <snip> I certainly agree that DNS traffic is minimal. I was interested in doing this as a learning experience not because I thought it was going to make any difference in the performance of my small LAN. I'm still not convinced that using the forwarders isn't the best/correct solution. >From man named.conf (BTW, does anybody else on a RedHat 7.2 system get strange lines when typing "man named.conf" - it outputs a bunch of lines like "mdoc warning: Empty input line #2064" before getting to the man page). ----------------------------------------------------------------- Forwarding The forwarding facility can be used to create a large site-wide cache on a few servers, reducing traffic over links to external nameservers. It can also be used to allow queries by servers that do not have direct access to the Internet, but wish to look up exterior names anyway. Forwarding occurs only on those queries for which the server is not authoritative and does not have the answer in its cache. ----------------------------------------------------------------- Again this (specifically the last line) seems to indicate this is what to do. If the answer can be found in my machine's DNS cache, it is used, otherwise it uses my ISPs nameservers to do all the work (and then presumably caches the result). Dave _______________________________________________ Redhat-list mailing list [EMAIL PROTECTED] https://listman.redhat.com/mailman/listinfo/redhat-list
