>> Both Host A and B are configured to use DNS files, then host files
>> Host A telnets to Host B usin the command:
>> telnet hostB
>> Now, when Host B hears the "knock at the door" on port 23, it reads
>> the header information and gets the IP address of the sending host
>> (among other things).
>> Question: In the Solaris 2.6 (or above) environment, with BSM on, does
>> Host B then do anything like a forward/reverse lookup on the IP
>> address before responding ?
>> Bill W
>If you Install ( or activate in solaris9 as its in the base )
>TCPWrappers and use the PARANIOD compile option and
>change /etc/init/inetd.conf to use the "tcpd" glue app.
>it will do a DNS lookup of the incomming call.
>Otherwise I sort of doubt it. In many situations you dont
>want to put this extra DNS traffic on the net nor the DNS
Telnetd always does a reverse DNS lookup. How do you think the hostname
shows up in "who" output?
A frequent problem that many sites have when they don't set up reverse DNS
properly is that telnet connections stall for a long time before displaying
the "login:" prompt. This delay is due to waiting for a timeout while
trying to perform this reverse resolution.
Level(3), Woburn, MA
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