$ ftp ftp.radb.net
Connected to ftp.radb.net (198.108.1.48).
421 Service not available, remote server has closed connection
$ ftp ftp.merit.edu
Connected to ftp.merit.edu (198.108.1.48).
421 Service not available, remote server has closed connection
- billn
Works for me. Are you sure you are not coming from a PTR/A record mismatch ?
smarthost1# host 66.235.194.37
37.194.235.66.IN-ADDR.ARPA domain name pointer ds194-37.ipowerweb.com
smarthost1# host ds194-37.ipowerweb.com
Host not found.
smarthost1#
smarthost1# host -tns ipowerweb.com
ipowerweb.com name server ns2.ipowerweb.net
ipowerweb.com name server ns1.ipowerweb.net
smarthost1# host ds194-37.ipowerweb.com ns1.ipowerweb.net
Using domain server:
Name: ns1.ipowerweb.net
Addresses: 64.70.61.130
smarthost1# host ds194-37.ipowerweb.com ns2.ipowerweb.net
Using domain server:
Name: ns2.ipowerweb.net
Addresses: 66.235.217.200
smarthost1#
Quite possibly, didn't even occur to me to check from that host. Donkey shins for the clue by four.
- billn