Date: Sun, 9 Feb 2025 10:28:50 -0700 From: Gary Aitken <freebsd@dreamchaser.org> To: FreeBSD Mailing List <freebsd-questions@freebsd.org> Subject: natd problem -- pass specific IP to internal machine Message-ID: <32257deb-4ef3-4d7f-bb15-94cc8743dcd5@dreamchaser.org>
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my natd has been translating fine using: interface xl0 use_sockets yes same_ports yes unregistered_only yes However, I am having an issue with a particular internal system (solar inverter) and I would like to be able to tcpdump it on the external interface. For testing, I tried assigning one of my external IPs to a workstation, but the workstation doesn't appear to communicate on the external network. A tcpdump shows syn packets going out on the external address, but none coming back. I see an unanswered ARP request for the alias_address from the dslmodem, which makes sense in that the internal workstation is not directly connected to that network. The changes I made: natd.conf on gateway: #interface xl0 redirect address 192.168.x.y aa.bb.cc.ee alias_address aa.bb.cc.dd aa.bb.cc.dd is xl0 addr on gateway internal workstation: ifconfig re0 alias aa.bb.cc.ee netmask 255.255.255.255 network topology: =====dslmodem=== xl0-gateway-fxp0 ===internal=== re0-workstation What am I missing? Thanks, Garyhome | help
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