long dns records

[Mate Wierdl]

How long are these?  Can you give me an example?
How can I test a dns patch?

I started noticing entries in my ftp log like:

Aug 15 15:36:59 moni proftpd[28583]: refused PORT 192,168,0,2,17,58
from
adsl-216-103-86-10.dsl.snfc21.pacbell.net (address mismatch)

Is this related or proftpd is doing its job?

Thx
Mate