文章目录GRE NAT穿越作者主页点击Datacom专栏点击⏰️创作时间2026年06月29日11点00分GRE NAT穿越FW1sys sys FW1 firewall zone trustaddinter g0/0/0 inter g0/0/0ipad12.1.1.124service-m p piproute-s0.0.0.0012.1.1.2 interface tunnel1ipadd100.1.1.130tunnel-protocol gresource12.1.1.1 destination100.1.103.3 service-managepingpermit firewall zone dmzaddinterface tunnel1security-policy default action permit yFW2sys sys FW2 firewall zone trustaddinter g0/0/0addinter g1/0/0 inter g0/0/0ipad12.1.1.224service-m p p inter g1/0/0ipad100.1.102.224service-m p piproute-s0.0.0.00100.1.102.1 nat server protocol47global100.1.102.100 inside12.1.1.1 security-policy default action permit y display firewall server-mapAR1sys sys AR1 inter g0/0/0ipad100.1.102.124inter g0/0/1ipad100.1.103.124FW3sys sys FW3 firewall zone trustaddinter g0/0/0 interface g0/0/0ipad100.1.103.324service-m p piproute-s0.0.0.00100.1.103.1 interface tunnel1ipadd100.1.1.230tunnel-protocol gresource100.1.103.3 destination100.1.102.100 service-managepingpermit firewall zone dmzaddinterface tunnel1security-policy default action permit y