[*] Ensure your VOIP install isn't compromised.

[Jason Lee]

Saw this today:
http://www.winnipegfreepress.com/breakingnews/hacker_makes_costly_calls.html

In this case I'm not sure if asterisk was used (no reference to 
equipment) but it is a reminder of the costs that can be racked up if 
your phone system is compromised. And don't think it doesn't happen 
often. I've seen it a few times lately.

And I just wanted to remind everyone to make sure your taking steps to 
prevent your voip installation from being compromised. These include 
using a RFC 1918 ip addresses for your voip pbx and phones when 
possible, placing your voip phones and pbx on a separate VLAN if 
possible, using secure passwords for all sip and iax communications, 
using ssh keys or secure passwords for user accounts on your phones and pbx.

Also you can block routes in your dialplan that you don't use.  For 
instance.

Instead of sending everything to your ITSP. Only send:

1204NXXXXXX or 1NXXNXXXXXX

or if you do call the UK send.

01144.

or if you call several international areas and don't want to add them 
all in separately. block high cost routes that you don't call such as cuba.

exten => _01153.,1,Congestion()

-- 
Regards, 
Jason Lee 
OmegaServ 
jlee at omegaserv.com 
204-480-1238 Direct Line 
866-664-7786 ext 200 Toll Free 
204-480-3374 ext 200 Winnipeg 
403-538-7786 ext 200 Calgary 
http://www.omegaserv.com 

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