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Re: Red Hat ES version And Cent OS



On Oct 28, 2005, at 7:45 AM, lasa wrote:

I would like to know
1. Is Red Hat ES exactly like Cent OS? (comparing the Security, protection,
Kernel and other applications)

Please search the archives, this has been discussed numerous times (even in the last week).

2. How can we find out the open ports and unwanted applications that easily intruder can hack if they are installed in a Mail server and DNS server?
(details for any web site or any book)

Nessus is a utility for vulnerability scanning. If you are on the server in question, you can use "netstat -vat" and "netstat -vau" to see listening TCP and UDP ports, respectively. If you see any unknown services, you can use "lsof -i <protocol>:<port>" to determine what processes are listening. Example:

[root colo root]# lsof -i tcp:465
COMMAND  PID USER   FD   TYPE DEVICE SIZE NODE NAME
master  2138 root   14u  IPv4   4662       TCP *:smtps (LISTEN)

--
Jason Dixon
DixonGroup Consulting
http://www.dixongroup.net





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