Configuring Proxy ARP for Manual NAT
https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk30197
Configuration for Proxy ARP is two-fold:
Configuring Layer2-to-Layer3 matching on Security Gateway / each cluster member - matching IP addresses of the relevant hosts on the Internal network (where the hosts are located) to the MAC Address of the Security Gateway on the External network (where the IP addresses of these hosts should be published).
On Check Point Security Gateway / Cluster member, this matching is saved in the $FWDIR/conf/local.arp file.
Creating relevant Manual NAT rules in SmartDashboard and installing the policy.
A is correct.
For R80.10, automatic proxy ARP configuration can be enabled. Seen here:
https://checkpoint.engineer/releases/r80-10-automatic-proxy-arp-with-manual-nat-rules/
and
https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk114395
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