Security Basics mailing list archives
Re: Out of my league.....
From: "Paul Kurczaba" <paul () myipis com>
Date: Thu, 8 Jan 2004 15:25:30 -0500
Ports 139 and 445 are used for Microsoft netbios. Here is more info: http://grc.com/port_139.htm http://grc.com/port_445.htm -Paul Kurczaba ----- Original Message ----- From: "Jeff Johnson" <jjohnson () redoakgroup com> To: <security-basics () securityfocus com> Sent: Wednesday, January 07, 2004 4:16 PM Subject: Out of my league.....
Hello. My ignorance will be vivid here.... I'm currently doing marketing at a small office, but, as I'm technically inclined enough to be dangerous, in my spare time do the IS support as
well.
They had an outside consultant set up the system, and he had done other setups/management when needed, but, is no longer available. He'd set up
the
network with a Symantec VPN/Firewall appliance as the external gateway,
but
had opened up ports to a server inside the network which is currently hosting the email server (Xmail), DNS, as well as a simple web app to do web-mail checking for employees from the outside. Also opened ports for ssl, termserver, ftp, smtp, and pop3, and another port for remote admin. Looked a bit insecure for me when I noticed it, so, I installed ZoneAlarm
on
this server inside the network, which is currently working. Plans are to move the web serving onto another server which will be put into a DMZ.
After
noticing these open ports, I also decided to pay more attention to the firewall logs, and noticed not just the normal external port scan attack blocks, but also that a couple of computers, including the company server, are attempting to access outside IPs using closed port calls (therefore,
the
firewall catches and logs them). These blocks come with the message Block host "" internet access, and are typically using ports 139 & 445. Looked suspicious, so, I ran an fport scan on the server, and it did show ports
139
& 445 open, but, shows that the Pid is 8 (the system).....Also did some ethereal scan of the network, and it does show that the server is trying
to
access this specific external ip address. My question is (kudos if you've patiently read everything so far), how do
I
find out what this process is that is trying to do these accesses, or am I being overly paranoid. As you can most likely tell from this, I'm not the most technically adept IT support person, so, I'd also appreciate references/suggestions on materials to help me out here. Thanks in advance to all. Jeff --------------------------------------------------------------------------
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Current thread:
- Out of my league..... Jeff Johnson (Jan 08)
- RE: Out of my league..... David Gillett (Jan 08)
- RE: Out of my league..... Jeff Johnson (Jan 08)
- RE: Out of my league..... JM (Jan 09)
- RE: Out of my league..... Jeff Johnson (Jan 08)
- Re: Out of my league..... Dani Wuck (Jan 08)
- Re: Out of my league..... Paul Kurczaba (Jan 09)
- Re: Out of my league..... Daniel Bruce Lynes (Jan 09)
- Re: Out of my league..... Caylan Larson (Jan 12)
- Auditing / Logging software n30 (Jan 12)
- <Possible follow-ups>
- RE: Out of my league..... Sathiyamurthy Rajagopalan (Jan 09)
- Re: Out of my league..... pordeus (Jan 09)
- RE: Out of my league..... David Gillett (Jan 08)