SOLVED

The following works !

I guess one of my others rules was blocking

table ip Tip {
        chain prerouting {
                type nat hook prerouting priority -100; policy accept;
                ip daddr 192.168.y.2 log prefix "forwarded " dnat to 192.168.y.3
        }
        chain postrouting {
                type nat hook postrouting priority 100; policy accept;
                masquerade
        }
        chain INPUT {
                type filter hook input priority filter; policy accept;
        }
        chain FORWARD {
                type filter hook forward priority filter; policy accept;
        }
        chain OUTPUT {
                type filter hook output priority filter; policy accept;
        }
}

Hi, Thank to all of you.

I made a test environment with the following.

• Machine A: 192.168.Y.1
• Machine B: 192.168.Y.2
• Machine C: 192.168.Y.3

The goal is to send a ping A to B, B forward to C

So ping -4c 1 192.168.y.2 from A, should ping B fw C

I’ve set the following rule in /etc/nftables.conf

table ip Tip {
        chain prerouting {
                type nat hook prerouting priority dstnat; policy accept;
                iif "eth0" ip protocol icmp dnat to 192.168.y.3
        }
        chain postrouting {
                type nat hook postrouting priority 100; policy accept;
                ip saddr 192.168.y.3 masquerade
        }
}

but is not working :'(

I see B receive the package

preroute: IN=eth0 OUT= MAC=▒▒ SRC=192.168.y.1 DST=192.168.y.2 LEN=84 TOS=0x00 PREC=0x00 TTL=64 ID=21398 DF PROTO=ICMP TYPE=8 CODE=0 ID=17950 SEQ=1

but it seem C receive nothing…

Any ideas ?

AppImage !

• Open format? Yes
• Free format? Yes
• Fully Contained Single Executable Support . Like an exe file for Windows systems Yes (the only one)
• App Size** The lowest** !

https://en.wikipedia.org/wiki/AppImage

Matrix
https://www.fosslinux.com/42410/snap-vs-flatpak-vs-appimage-know-the-differences-which-is-better.htm
https://phoenixnap.com/kb/flatpak-vs-snap-vs-appimage \

Thank you very much @taaz

So you say 2 but with unix socket so it the same as my proposal number 3 ? no ?

I’ll check capabilities

indeed I need it to be scriptable.