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We are looking for a way to configure a Checkpoint R65 based NAT to not periodically change source port mapping for NATted UDP communication. &nbsp;From network sniffs on the WAN side of the NAT we see that the source port (from the NAT) is incremented by one every few minutes. &nbsp;Is there a way to disable this behavior such that the source port remains fixed, or to increase the interval at which this occurs. &nbsp;BTW a static NAT is not an option for security reasons. &nbsp;Many thanks.
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We are looking for a way to configure a Checkpoint R65 based NAT to not periodically change source port mapping for NATted UDP communication.  From network sniffs on the WAN side of the NAT we see that the source port (from the NAT) is incremented by one every few minutes.  Is there a way to disable this behavior such that the source port remains fixed, or to increase the interval at which this occurs.  BTW a static NAT is not an option for security reasons.  Many thanks.

How to Prevent Checkpoint NAT from Changing Port Mapping

Software firewalls, also known as host-based firewalls, provide a layer of software on one host that controls network traffic in and out of that single machine. Most operating systems now include firewall software, but many available software firewalls include central distribution, antivirus systems and disaster recovery.

Software Firewalls

Hardware-based firewalls provide more sophisticated protection for inbound and outbound traffic than the simple Windows software firewall or the basic NAT firewalls found in routers. These devices implement techniques such as stateful packet inspection, deep packet inspection, and content filtering; and may include built-in antivirus and anti-malware protection.