I have a very casual scenario and apologies to pointing to a personal web-blog but i have all the outputs documented there so i thought it would save time for everyone, let me know if its otherwise , i will try to point it out here.
The below one am using a source-pool and as we can see all the outputs mentioned below. The only catch is for external interfaces am using gre interface gr-0/0/0, i have not used any proxy-arp configuration anywhere and still it works fine.
I have configured destination nat for ip 18.104.22.168/32 which is non-exsistant on router and still because of D-NAT policies i can see everything working fine, again i am using a gre interface for this and am not using any proxy-arp
I read proxy-arp and understand that any ip which has not been configured on the device and still out of requirement if devices uses that arbitrary IP, we use proxy-arp, what is that JUNOS srx is flawless even without the usage , is that becuase it is over GRE ?