Update This is no longer available, the internet APN has public IPs.

A quick tip for Vodacom 3G / GPRS / EDGE users in South Africa.

There is a special APN called “internetvpn” for laptop users who connect to corporate VPNs. While this probably doesn’t interest most readers, it is a useful APN to use because:

• You get a real Public IP address, not a private NATted one.
• You get lower latency.
• The cost is the same. (i.e. regular data bundles work fine)

If you use a VPN, this will probably make it more reliable, and if you don’t it will at least make your ssh use more comfortable.

Unfortunately, the following vodacom issues will still be present:

• No incoming TCP connections (i.e. you can’t serve web pages from or ssh into your laptop)
• Often you get “martian” DNS servers (10.11.12.13 and 10.11.12.14). Either reconnect, or manually set your DNS servers to 196.43.46.190 (SAIX) and 196.207.40.165 (Vodacom).
• TCP connections are regularly reset. (Overloaded NAT/Firewall hardware?)

How to get it:

1. Call vodacom customer care (111).
2. Follow the IVR menu options in the directions of data cards.
3. Ask them to enable the “internetvpn APN” (you might have to explain it to them)
4. Reconfigure your phone / chat script / “data card driver” to use “internetvpn” instead of “internet”
5. Profit! :-)