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This is the support site for Andrews & Arnold Ltd, a UK Internet provider. Information on these pages is generally for our customers but may be useful to others, enjoy!

VoIP Firewall: Difference between revisions

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'''RTP''' is the actual audio. On the older call servers it will be as direct as possible the audio can be sent from anywhere on the internet. Using the ne call servers it is only from the same call server as the SIP control messages. On most phones you can configure which ports to use for RTP, so you can restrict this range further. For example, on a SNOM phone the default range for RTP is 49152 to 65534.
 
==Other things to Firewall==
*Don't allow access to your phone or servers web configuration pages from the Internet.
*If you run your own server and allow phones to use it from your WAN/Internet, then lock this down as much as possible - perhaps only allow access to your PBX from the Internet via a VPN.
 
 
 
==NAT==
autoreview, Bureaucrats, editor, Interface administrators, reviewer, Administrators
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