[Info-vax] Help to eliminate delay in establishing FTP connection (VMS V7.x on VAX with MultiNet V4.4)

[gah4]

On Thursday, March 18, 2021 at 9:15:08 PM UTC-7, Tad Winters wrote:
> I'm hoping that you might give me some ideas to remediate this problem. 

(snip)

> At first, I thought it must have something to do with DNS, as it 
> appeared the forwarders were all pointing to the internet, and I thought 
> it must be attempting to do some reverse lookup. 
> I made some changes, including defining a logical for MultiNet FTP to 
> have a fast timeout, and thought it would start working better. Not so. 

Tradition, especially for ftp, is to do the reverse DNS lookup, and then verify
by doing a forward lookup on the returned name.  One of the A entries
(there can be more than one) should match the original address.

This protects against fake names in the reverse entries.

But more recently, there are so many bad DNS files that many
stopped doing that.