Clearly, security has its costs. But these are top speeds. The limiting factor is often the external net or host. In any case, several users have expressed satisfaction about the throughput. The new gateway achieves a useful balance of utility and security.
Most internal users seem to be happy with pftp and ptelnet.
Some have asked for talk, resolver service and other UDP-based protocols. These could be provided with non-proxy services on INET accessible through Datakit. There are certainly limits to our security. If R70 and INET are subverted, the inside machines could be attacked. Insiders can easily import trouble such as Trojan horses or programs infected with viruses.