The sysadminman demo system is now running FreePBX 2.7 and A2Billing 1.6.

Please see here for access details – http://sysadminman.net/livedemo.html

WARNING: be very careful when editing IPTables firewall rules. It is relatively easy to completely disable access to your machine.

All Sysadminman VPSs come with IPTables enabled. However to allow for VOIP traffic both SIP and IAX ports are opened.

If you know that your VOIP providers and all extensions are on fixed IP addresses then it is possible to limit connections to just those addresses.

Continue reading ‘Limiting SIP/IAX connections to Asterisk with IPTables’ »

A sysadminman template VPS comes already setup to use SSL (https) for web connections to a2billing and FreePBX. However, this is using a locally signed ssl certificate so you will receive a certificate warning when accessing your VPS. This is no less secure but can create a poor impression depending who will be accessing the site.

It’s relatively straight forward and inexpensive to get yourself a valid, externally signed, certificate.

The sysadminman template uses lighttpd as the web server so you need to follow these instructions -

Log in to your VPS as root:

Continue reading ‘Namecheap SSL certificate for Sysadminman VPS’ »