in reply to Re: Check for tftp daemon listening on remote server
in thread Check for tftp daemon listening on remote server

When I run the above code, I always receive the response that the port is listening. Even when I shut down my tftp server and verify that the server is not listening on UDP69 through netstat -na | grep -i udp. *:69 does not show up in the list. Yet, I receive the response from the script that port is up.

humbly -c

  • Comment on Re: Re: Check for tftp daemon listening on remote server

Replies are listed 'Best First'.
Re: Re: Re: Check for tftp daemon listening on remote server
by xylus (Pilgrim) on Jan 16, 2002 at 23:52 UTC
    I'm not really sure where to go from here. I've tried the code on 6 separate linux servers, 2 BSD servers, and 2 Windows 2000 workstations. All have the same output.

    It may be a system-level thing on the computer you are working with (maybe the TFTP Daemon is still listening)

    What OS are you attempting to run this under? Perhaps there is some debugging you can do there? 
    
----------------------------------------------------------
#!/usr/bin/perl
@==qw/p e r l m o n k s/;$|*=1;@;=qw/8 15 7 9 -1 7 7 2 0/;
foreach$-(@=){for(++$|..$;[$:++]){$-++}$..=$-}$.=~s/m/l/g;
$*=$;[4]+1;for($;[9]..$;[0]/2){$,.=substr($.,$*++,1);$*++;
}print$,;#http://www.perlmonks.org/index.pl?node_id=98506;
[reply]
      I'm trying this script out strictly on RedHat Linux 7.1 machines. I've tried it on serveral boxes that do not have a tftp server running and yet the response is always Port is up". Are you actually seeing the output of "Port 69 is down"?

      humbly -c

[reply]

In Section Seekers of Perl Wisdom