02-02-2017 02:22 AM - edited 02-02-2017 02:51 AM
In PanOS 7.x the Global Protect Protals drops TCP-Connects with ECN Flag set silently.
This can only be seen in the drop-PCAP.
Also proxy_offload_check_err counter increments with each SYN.
This is a behavior which differs from most Webservers we see today.
If you have no idea why somebody would like to have ECN enabled, have a look at
https://www.bufferbloat.net/projects/cerowrt/wiki/Enable_ECN/
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