SRX5308 Throughput Reduced with Firewall Rules

I will narrate the issue just so that it can be documented. I hope it can be passed along as far as it needs to be fully resolved. My Gigabit Fiber WAN is very stable and does not fluctuate.

SRX5308 Router Problem with LAN<--> WAN throughput. If the router is booted with any firewall rules enabled, throughput is limited to a rather jittery 95 - 120 Mbps down and under 100 Mbps Up. When booted with all firewall rules disabled and nothing else changed, the throughput is very solid and stable 850 - 930 Mbps down and 900 - 950 Mbps Up.

This problem is entirely dependent on the boot configuration having any firewall rules enabled. If the router is booted with any firewall rules enabled then the situation persists (after boot I cannot disable and then re-enable rules to fix it). If the router is booted with all firewall rules disabled then I can enable, disable, enable them without having the problem and it persists (throughput is as expected until there is another reboot). No other settings in the router affect the throughput issues.

I have experienced this issue with both firmware versions 4.3.0-19 and 4.3.1-22. I did not have the Gigabit WAN Connection before the 4.3.0-19 version. I have set the router back to manufacturer defaults and then restored settings from .cfg file and it has not changed the issue with either firmware versions. I have even restored the defaults and entirely set up all settings manually from scratch on each firmware revision. Nothing changed and it was many hours of wasted time.

This is an escalated issue that must have the “bug” resolved as fiber WAN Links can routinely be had over 100 Mbps