RE: OT: VOIP Recommendations
- From: "David Farinic" <davidf@xxxxxxx>
- To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
- Date: Tue, 1 Mar 2005 19:13:54 +0100
I like Skype but I don't like its protocol usage "morphing" and p2p
system from security perspective.
IMHO it be more secure with
a/ SKYPE Clients on DMZ PC which is connected to internal telephone
system (or DECT wireless) so client's PC behind firewall are not
affected at all.
b/ SKYPE on 1 DMZ PC used as Super Node by Skype Clients behind
ISA(firewall):
By
Allowing http/https connection to SKYPE.com URL destination set
and http/https + 1 selective UDP port to IP of SKYPE DMZ PC (Super Node)
on ISA server from skype application/clients authenticated by
firewallclient.
To make this supernode immediately visible for SkypeClients behind ISA
server we have to enter its IP and udp/tcp ports in registry
(Skyperegistry...>lib>connection>HostCache).
Like this All Skype connections will be under better "control.
Plus is also that clients can still use SKYPE's fast(time sensitive;)
UDP protocol(with fixed IP&PORT) for calls. (this isn't always the case
as skype behind strict ISA server might use tcp/ip which is much slower
for voice and probability for delays is much higher)
Another plus is that communication between local clients will not leave
company's network.
Can't wait for SkypeIn service;)
With Regards David Farinic.
Callto://spaceq
-----Original Message-----
From: Amy Babinchak [mailto:amy@xxxxxxxxxxxxxxxxxxxxxxxxxx]
Sent: Tuesday, March 01, 2005 5:50 PM
To: [ISAserver.org Discussion List]
Subject: [isalist] OT: VOIP Recommendations
http://www.ISAserver.org
Tom and everyone,
I see from Deb's newsletter that she's in love with your new VOIP
system. From the diagram it looks like you've got it separated from the
data network. I've got Comcast cable Internet, so I'm looking to VOIP to
help me cut costs.
My home is my office too and I'm getting killed by the phone bills. 4
cell phones, office land line, home land line and a fax sharing the
office line. All totaled up and we're talking about $600. We're moving
to a "family" plan for the cell phones but have yet to come up with
something for the 2 land lines. In-State LATA is the biggest call
volume. So can you get 2 or 3 "lines" when using VOIP and separate out
the home calls from the office calls?
What does everyone like for VOIP providers?
Amy
Harbor Computer Services
Small Business Computer Specialists
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