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application-screen (Security SIP)



Hierarchy Level

Release Information

Statement introduced in Junos OS Release 8.5.


Configure the security screens for the Session Initiation Protocol (SIP) Application Layer Gateway (ALG) to handle unknown-messages and protect SIP server.

IPv6 is supported on the SIP ALG along with Network Address Translation Protocol Translation (NAT-PT) mode and NAT64 address translation.

The type of the <destination-ip-address> is changed from IPv4 address to IP prefix to support all kinds of IP addresses, and correspondingly a prefix is supported to allow multiple IP addresses.


The remaining statements are explained separately. See CLI Explorer.

Required Privilege Level

security—To view this statement in the configuration.

security-control—To add this statement to the configuration.

Related Documentation