Com.X Administrator Guide
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6.16 fail2ban integration
Com.X systems are shipped with fail2ban installed and enabled.
fail2ban provides a comprehensive and flexible mechanism for preventing
unauthorized access to Com.X systems. The fail2ban application acts as a security
monitor and firewall manager, detecting multiple failed attempts to access a service
(such as ssh or SIP) from the same IP address and then blocks the address for a
configured period of time.
6.16.1
Configuration
The default configuration blocks the source IP address of 4 consecutive SSH access
failures for 10 minutes and 10 consecutive SIP failures for 1 hour:
Note:
Ensure that fail2ban is running by checking the Services screen under the
Status tab.
6.17
ViBE
The ViBE application from Voipex addresses the common issue of limited ADSL
upstream bandwidth. With many small offices relying on an ADSL line for both data
and VOIP traffic, typically, the upstream link becomes a limiting factor in the number
of simultaneous calls the network can support.
The audio stream of a typical VOIP call is only 8kbit/s, however the protocol and
network overheads introduced during transmission can often exceed a further
34kbits/s bandwidth requirements.
The ViBE application creates a tunnel between two ViBE end points, significantly
reducing protocol overheads on multiple packets and dynamically optimizing voice
compresssion, resulting in a much higher permissible call density over a single ADSL
link.
Where a typical upstream ADSL link of 256kbits/s can support a maximum of 6
simultaneous G729 VOIP calls, a ViBE-enabled line of the same bandwidth can
support a maximum of approximately 28 similar simultaneous calls.
For further details on ViBE configuration and integration, please see the white paper
located at :
http://farsouthnet.com/wp-content/uploads/2011/05/Runway-X-ViBE.pdf
Note: The White paper referenced above describes the integration of a “Runway”
branded Com.X PBX with ViBE. The document is, however, relevant for Runway
and Com.X products.
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2016
Far South Networks