snat with dynamic ip address

snat with dynamic ip address

[Lars Noodén]

I have the following table within a NFTables rule set, but the address
given below (192.168.1.213) is assigned via DHCP and will change from
time to time.   How should I rewrite that line to do SNAT using whatever
the current IPv4 address happens to be at the moment?

/Lars

table ip nat {
         chain postrouting {
                 type nat hook postrouting priority srcnat; policy accept;
                 ip saddr 172.16.3.0/24 oif "wlan0" snat to 192.168.1.213
         }
}

Re: snat with dynamic ip address

[seentr]

Have you tried masquerade? Seems like it is what you are looking for.

2024-02-29T10:11:15Z Lars Noodén <lars.nooden@gmx.com>:

> I have the following table within a NFTables rule set, but the address
> given below (192.168.1.213) is assigned via DHCP and will change from
> time to time.   How should I rewrite that line to do SNAT using whatever
> the current IPv4 address happens to be at the moment?
> 
> /Lars
> 
> table ip nat {
>          chain postrouting {
>                  type nat hook postrouting priority srcnat; policy accept;
>                  ip saddr 172.16.3.0/24 oif "wlan0" snat to 192.168.1.213
>          }
> }

Re: snat with dynamic ip address

[Lars Noodén]

On 2/29/24 12:19, seentr@at.encryp.ch wrote:
> Have you tried masquerade? Seems like it is what you are looking for.

Thanks.  Masquerade was it.

/Lars

table ip nat {
         chain postrouting {
                 type nat hook postrouting priority srcnat; policy accept;
                 ip saddr 172.16.3.0/24 oifname "wlan0" masquerade;
         }
}