Communication Services on the Internet include the perennial Web Presence, as well as the mundane Mail Service to Secured Virtual Private Networks (VPN) over the Public Internet. But the Internet is a wild 'dangerous' place and OpenBSD is a great platform for securing communication resources.
OpenBSD is at the forefront of standardising security focused methodologies of whole-system development. The most public communications tool from this effort has been the OpenSSH Project. We reference some useful notes here, together with notes on other mechanisms for securing communciations such as:
Instant Messaging is an enabling tool for immediate communications between your clients/staff.
- Chat/Jabber XMPP Server
Once you install your basic mail server, you find there are various deployment options, such as Proxy Servers and sites using Virtual User Accounts (both using Postfix) :
- Sendmail the internet standard MTA, in your base install
- Client Access getting at your e-mail
- Proxy Server
- Virtual User Accounts
VoIP Voice Over IP
Using your data network for Voice (telephony) communications has a number of advantages, not only in the cost of calls, but the cost of infrastructure deployment.
VPN using OpenVPN
- Setting Access Policies for Web Access using squid
- Web Content Filtering, with dansguardian and squid
- Securing Web Traffic using SSL Certificates, and OpenSSL