Cisco Firewall rules and DHCP

[OldTechUser]

I am integrating an Analog Telephone Adaptor (Cisco ATA-192) with a Cisco RV345 Router. The SIP Provider requires that the Cisco RV345 firewall have specific rules defined for their communications with the ATA-192. These rules have a Destination IP Address for the ATA-192 device.

The question I have is whether the ATA-192 Destination IP Address can be dynamic (assigned by DHCP) or does it need to be a static address? Cisco documentation does not seem to address this issue.

The underlying question is whether the Cisco RV345 DHCP component adjusts the destination IP addresses defined in the firewall rules when it assigns a new IP address to a device.

[balaji.bandi]

if you making any Rule for incoming with NAT, then i suggest to have ATA to be static IP with DHCP Reservation, so you can make correct Access policy rule.

[OldTechUser]

I got 2 separate responses to my question at this point. 

Both suggest using a Static IP Address outside of the DHCP dynamic address range. I also have determined that the Cisco RV345 apparently cannot do DHCP Reservations.

So I will define a Static IP address for the ATA-192 outside of the range of the SDHCP dynamic range and proceed from there.

Thanks for looking at my issue.