The NCP Secure Entry CE Client communicates with VPN gateways supplied by a wide range of manufacturers, on the basis of the IPSec standard, e.g. Cisco, Checkpoint, D-Link, WatchGuard, FreeSwan, etc. (see IPSec compatibility). This involves client software that can be used as an alternative to the software clients offered on the market in the firewall and router area. The Secure Entry Client is differentiated from other IPSec clients through its feature set and software architecture. The software now also supports Windows Mobile 6.0 + 6.1.