Checking if a Port is open without Telnet installed

[Rwac]

Question specific to ESX Server:

How can we check if a port is open if telnet is *not* installed?

Would be handy if you someone could specify the right syntax also.

Regards,

 

[.walls]

from the esx server that you want to query...

# esxcfg-firewall -q

Will show what is enabled. The esx firewall is just a wrapper for iptables though...

Also, bear in mind - this is for VI3, and that iptables is configured to drop by default.

EDIT: You could also use netcat or nmap... but you'll have to either compile them yourself (no biggie), or find an rpm for RHEL3 and install that.