Last week I noticed some problems with DirectAccess by using UMTS/3G broadband network of a Dutch mobile provider (KPN). A number of IPv6 translation methods don’t work by default which results DirectAccess by broadband is not always guaranteed. Table below shows a comparison of the various telecom providers and supported IPv6 translation methods.
IPv6 Translation ISP Provider support matrix
- Teredo traffic—UDP destination port 3544 inbound and UDP source port 3544 outbound.
- 6to4 traffic—Protocol 41 inbound and outbound