Configuring the Firewall
Configuring Basic Firewall Settings
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Remote Management
Remote Access
Remote Upgrade
Allowed Remote IP 
Address
Remote Management 
Port
See Configuring Remote Management.
IPv4 Multicast 
Passthrough (IGMP 
Proxy)
Check Enable to enable multicast passthrough for 
IPv4.
IPv6 Multicast 
Passthrough (IGMP 
Proxy)
Check Enable to enable multicast passthrough for 
IPv6.
SIP ALG To allow Session Initiation Protocol (SIP) traffic to 
traverse the firewall, check the SIP ALG check box. 
The device supports a maximum of 256 sessions.
UPnP
Allow Users to Configure
Allow Users to Disable 
Internet Access
See Configuring Universal Plug and Play.
Block Java Check to block Java applets. Java applets are 
small programs embedded in web pages that 
enable dynamic functionality of the page. A 
malicious applet can be used to compromise or 
infect computers. 
Enabling this setting blocks Java applets from 
being downloaded. Click Auto to automatically 
block Java, or click Manual and enter a specific 
port on which to block Java.