Инструкции По Установке для Nortel 100

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Appendix B Workstation support
209226-B
For IP workstations, this is not possible because the DNS query is formed by the 
operating system’s networking software. Instead, the host name access control 
check can only be performed by the Instant Internet unit itself. This requires that 
all IP workstations use the Instant Internet DNS proxy server. If a workstation has 
access to a DNS server other than the Instant Internet DNS proxy server, host 
name access controls cannot be applied to that workstation.
Since the DNS proxy is typically used in conjunction with the IP workstations to 
provide complete isolation of the local network from the Internet, few problems 
should occur.
Using older versions of the Instant Internet workstation 
software
Instant Internet version 7.11 supports only workstation software 3.10 and later. If you have 
workstations with Instant Internet workstation software earlier than 3.10, you must upgrade those 
workstations
.