Sorry for delay.
To have all web traffic re-directed via SSH you will have to use so
called "Dynamic Proxy" feature of AVPN. This is how you can do it.
1) In Preferences/General/Extras check "run" for "Dynamic Proxies".
2) Configure AVPN to access your SSH Server ( it looks like you
already have done this step )
3) Create new profile and drag your SSH Server (the one you configured
in prev step) into it.
4) Start profile.
At this point you will have AVPN acting as "SOCKS" proxy on your box.
If you are using FireFox, you can configure it to use this SOCKS proxy
(Preferences/Advance/Network/Settings Manual Proxy Configuration
SOCKS Host 127.0.0.1 port 1080 ). Alternatively, you can configure
access via SOCKS proxy system wide ( System Preferences/Network/
Advanced/Proxies Configure Proxies Manually SOCKS Proxy Host
127.0.0.1 port 1080 ).
NOTE: You can make your life a little bit easier if you check "control
system settings" checkbox when configuring AVPN's "Dynamic Proxy"
functionality (step 1). With this check box checked, AVPN will change
System Wide Proxy settings for you each time you running your profile
(configured in step 3).