Unified Services Router
User Manual
69
Figu re 39: Lis t of user d efined s ervices .
5.5 ALG support
Advanced > Firewall Settings > ALGs
Application Level Gateways (ALGs) are security component that enhance the firewall
and NAT support of this router to seamlessly support application layer protocols. In
some cases enabling the ALG will allow the firewall to use dynamic ephemeral TCP/
UDP ports to communicate with the known ports a particular client application (such
as H.323 or RTSP) requires, without which the admin would have to open large
number of ports to accomplish the same support. Because the ALG understands the
protocol used by the specific application that it supports, it is a very secure and
efficient way of introducing support for client applications through the router’s
firewall.
Summary of Contents for DSR-1000N
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Page 102: ...Unified Services Router User Manual 100 Figure 64 SSL VPN Portal configuration ...
Page 123: ...Unified Services Router User Manual 121 Figure 82 Device Status display ...
Page 125: ...Unified Services Router User Manual 123 Figure 84 Resource Utilization statistics ...
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Page 131: ...Unified Services Router User Manual 129 Figure 89 List of current Active Firewall Sessions ...
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