Vyatta Network OS Documentation

Learn how to install, configure and operate the Vyatta NOS, which helps drive our virtual networking & physical platforms portfolio.

The destination filter

The destination filter specifies the packets to which NAT applies based on their destination address, port, or both. NAT applies only to packets that have a destination address, port, or both that match that defined in the filter.

If the destination filter is not specified, then by default, the rule matches packets sent to any destination address and port. The destination filter can be used in SNAT and DNAT rules.

Filtering packets by destination address

The following example shows how to apply a SNAT rule, rule 30, to packets with a destination address of 12.34.56.78. Only packets with a destination address of 12.34.56.78 have address translation performed.

vyatta@vyatta# set service nat source rule 30 destination address 12.34.56.78