Ports of LoadBalancer svcs do not work in newly installed k3s.

[Magicloud]

I had one k3s installed in Redhat using the installing script. All fine.

Then I have this new installation in NixOS, which uses the one in nixpkgs. I tried a deployment and a service of LoadBalancer, the loadbalancer pod was up. But I could not access the service on public IP. I got connection refused.

I checked the loadbalancer pod and saw the iptables commands. I am not good at iptables, just tried to check iptables with the target ip I saw in those commands.

[nix-shell:~]$ sudo iptables -tfilter -L | grep 10.43.186.190

[nix-shell:~]$ sudo iptables -tnat -L | grep 10.43.186.190
KUBE-SVC-UNTZ66ODBJ7KDG2T  tcp  --  anywhere             10.43.186.190        /* proxy/socks2http cluster IP */ tcp dpt:http-alt
KUBE-MARK-MASQ  tcp  -- !nixos/16             10.43.186.190        /* proxy/socks2http cluster IP */ tcp dpt:http-alt

I saw three commands, and here in filter table, there is nothing.

What should I do/check?