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8.3.7.2 Firewall
Firewall Configuration
Firewall rules can be used to prevent unauthorized Internet users from accessing private
networks connected to this phone (input rule), or prevent unauthorized devices connected to
this phone from accessing the Internet (output rule). Each rule type supports a maximum of
10 items.
Field Name
Explanation
Enable Input Rules
Enable rules limiting access from the Internet.
Enable Output Rules
Enable rules limiting access to the Internet.
Input/Output
Specify if the current rule is input or output.
Deny/Permit
Specify if the current rule is Deny or Permit.
Protocol
Filter protocol type (TCP/ UDP/ ICMP/ IP)
Port Range
Set the filter Port range
Src Address
Set source address. It can be a single IP address or use * as a wild
card. For example: 192.168.1.14 or *.*.*.14.
Dest Address
Set destination address. It can be a single IP address or use * as a
wild card. For example: 192.168.1.14 or *.*.*.14.
Src Mask
Set the source address mask. For example: 255.255.255.255 points to
one host while 255.255.255.0 points to a C type network.
Dest Mask
Set the destination address mask. For example: 255.255.255.255
points to one host while 255.255.255.0 points to a C type network.