ment and the administrator want to inhibit LAN user from
using Telnet services (like BBS, on-line chat …), then it is
easily achieved by blocking all packet to service port 23.
Another example, blocking service port 110 (POP3) will inhibit
LAN user from checking/retrieving outside Internet e-Mail
account periodically. This is very useful when WAN connec-
tion type is Dial-On-Demand (like PPPoE/PPP). Then
Broadband Router could auto-disconnect at normal condition.
Otherwise the periodical e-Mail checking from LAN user will
cause Broadband Router to keep WAN connection alive for-
ever! Certainly, at this situation the LAN user can only use e-
Mail server inside (if POP3 server exist in LAN).
4.2 Service Time Allocation
"Service Time Allocation” allow administrator to control the
Broadband Router
LAN-to-WAN service is available or
disabled at some moment. This feature is implemented by
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