If you are on a machine without telnet you can use this perl script to check connectivity.
#!/usr/bin/perl
#
# nettest.pl
#use IO::Socket;
use Errno;
$| = 1;$host = shift;
$port = shift;
$type = shift || “tcp”;
die “No Host parameter!” if !$host;
die “No Port parameter!” if !$port;my $rc = new IO::Socket::INET
PeerAddr => $host,
PeerPort => $port,
Proto => $type,
Timeout => 5 or die “\nCan’t bind : $@\n”;print “\nSuccessfully bound to $host on port $port\n”;