Re: FTP site
On Sun, 17 May 1998, George Bonser wrote:
: On 18 May 1998, Martin Bialasinski wrote:
:
: >
: > It is your ISP's problem. Nothing you can do about it. Complain about it
: > and ask them to fix it.
: >
:
: It is PARTLY the ISP's problem. If they are unwilling to change the PTR
: record for the in-addr.arpa domain then the user is responsible for
: changing the hostname to match the exiating PTR record.
:
: In other words, you should probably set your hostname to what returns when
: you do a name lookup on your IP address if you ISP is not willing to
: change it.
Uh, no. Most ISPs do something like "nobody.netblock.isp.com" - that's
why the lookup fails. If they did it right, it would work everytime, no
matter what hostname the user has set.
Why? Well, let's examine what happens ...
You connect to the server. The server now has your IP address. It does
a reverse lookup on that address. It then does a FORWARD lookup on the
answer it got from the reverse lookup. We have a NAT pool here ... so
the IP address 208.150.221.219 might resolve to
pc-219.pix-pool1.midco.net. Luckily for MidcoNet users :),
pc-219.pix-pool1.midco.net does in fact resolve to 208.150.221.219. If
it doesn't, there's not a damn thing the user can do, sorry.
--
Nathan Norman
MidcoNet - 410 South Phillips Avenue - Sioux Falls, SD 57104
mailto://finn@midco.net http://www.midco.net
finger finn@kepler.midco.net for PGP Key: (0xA33B86E9)
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