"Wireless Modem" vs "Modem link" vs "internet sharing"
Like a lot of people here, I sometimes use a Notebook PC to connect to my work over VPN via my Universal. I've always used "Modem Link" as it was more reliable than "Wireless Modem".
In the most recent WM6 Roms, "Modem Link" seems to have disappeared, replaced by "Internet Sharing".
My Telco, like a lot of others, uses a NAT'ed IP address to provide GPRS/3G internet connectivity. "Internet Sharing" also uses IP NAT'ing to share the Telco's IP address. This creates a situation where you are NAT'ing a NAT'ed IP address.
To explain further:
1) Real internet ip address: 18.104.22.168
2) It is then NAT'ed by Telco and becomes 10.0.0.1
3) It is then NAT'ed again by "Internet Sharing" to become 192.168.0.1
This situation is fine for normal web browsing, but won't work when using a VPN client(ie: Cisco). Most VPN clients wont tolerate Double-NAT'ing.
Has anyone experienced this scenario?
Are there alternatives to "Wireless Modem" & "Modem Link"?
Is there a "Modem Link" cab floating around that can be installed separately on the newer WM6 ROM?
Or is there any way to get "Wireless Modem" working reliably?