No external connectivity

[OliverEvans96]

Hi there,

Thanks for sharing your work! I'm trying to share wifi from my laptop to a raspberry pi, as you did.

When I connect the two devices via an ethernet cable, they can ping each other, but neither device can access the internet. Not even when I use curl's --interface flag from my laptop.

Any idea what might be going on here?

Thanks, Oliver

[stanipintjuk]

Oof it's been a long time ago that I have used this config myself but I'll give it a shot.

I'll need

1. Your nixos config on your laptop (only the router part)
2. Output of ip addr from your laptop
3. Output of ip addr from your raspberry pi

[OliverEvans96]

Hi, sorry - it took me a few days to plug it back in. Here are the relevant details:

1. excerpt from configuration.nix

{
  imports =
    [ 
      # Include the results of the hardware scan.
      ./hardware-configuration.nix
        
      # Share wifi over ethernet
      # https://github.com/stanipintjuk/nixos-router
      (import /home/oliver/nix/nixos-router/mkRouter.nix {
        internalInterface = "enp0s31f6";
        externalInterface = "wlp0s20f3";
      })
    ];
    # --snip--
}

2. output of ip addr from laptop

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: wlp0s20f3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether <mac-addr> brd ff:ff:ff:ff:ff:ff
    inet 10.0.0.126/24 brd 10.0.0.255 scope global dynamic noprefixroute wlp0s20f3
       valid_lft 165747sec preferred_lft 144147sec
    inet6 2601:1c0:cf00:7950::afd0/128 scope global dynamic noprefixroute 
       valid_lft 597743sec preferred_lft 597743sec
    inet6 2601:1c0:cf00:7950:f48a:cc91:bfeb:c647/64 scope global temporary dynamic 
       valid_lft 331150sec preferred_lft 79293sec
    inet6 2601:1c0:cf00:7950:d2ab:d5ff:febb:4b12/64 scope global dynamic mngtmpaddr noprefixroute 
       valid_lft 331150sec preferred_lft 331150sec
    inet6 2601:1c0:cf00:7950:551:6825:96bf:7dda/64 scope global temporary dynamic 
       valid_lft 129404sec preferred_lft 69100sec
    inet6 2601:1c0:cf00:7950:70cb:858b:9da3:c4d6/64 scope global temporary dynamic 
       valid_lft 91365sec preferred_lft 68949sec
    inet6 2601:1c0:cf00:7950:8a61:c123:22de:e055/64 scope global temporary dynamic 
       valid_lft 21111sec preferred_lft 21111sec
    inet6 2601:1c0:cf00:7950:3cae:3dc2:9d4:b84a/64 scope global temporary dynamic 
       valid_lft 91215sec preferred_lft 60610sec
    inet6 2601:1c0:cf00:7950:814b:8fd9:5d4d:cad9/64 scope global temporary dynamic 
       valid_lft 324078sec preferred_lft 57934sec
    inet6 2601:1c0:cf00:7950:a5de:a70e:f661:ae39/64 scope global temporary dynamic 
       valid_lft 82883sec preferred_lft 57290sec
    inet6 2601:1c0:cf00:7950:6056:fded:d4e8:78c6/64 scope global temporary dynamic 
       valid_lft 302724sec preferred_lft 56399sec
    inet6 2601:1c0:cf00:7950:79af:510b:a1e4:cc12/64 scope global temporary dynamic 
       valid_lft 79553sec preferred_lft 52751sec
    inet6 2601:1c0:cf00:7950:f5f5:b451:f5cc:686c/64 scope global temporary dynamic 
       valid_lft 75018sec preferred_lft 50611sec
    inet6 2601:1c0:cf00:7950:4f44:21fe:e8b6:b329/64 scope global temporary dynamic 
       valid_lft 207713sec preferred_lft 49930sec
    inet6 2601:1c0:cf00:7950:53a:42d9:fd2e:927e/64 scope global temporary dynamic 
       valid_lft 192651sec preferred_lft 30476sec
    inet6 2601:1c0:cf00:7950:fcc4:d757:3666:73f7/64 scope global temporary dynamic 
       valid_lft 139092sec preferred_lft 27081sec
    inet6 2601:1c0:cf00:7950:2571:2168:f740:8192/64 scope global temporary dynamic 
       valid_lft 60517sec preferred_lft 22664sec
    inet6 2601:1c0:cf00:7950:1060:79d1:5b12:da2f/64 scope global temporary dynamic 
       valid_lft 135690sec preferred_lft 20922sec
    inet6 2601:1c0:cf00:7950:201f:e58a:672d:9dad/64 scope global temporary dynamic 
       valid_lft 129533sec preferred_lft 20783sec
    inet6 2601:1c0:cf00:7950:4c1a:460f:f254:e63f/64 scope global temporary dynamic 
       valid_lft 44930sec preferred_lft 19048sec
    inet6 2601:1c0:cf00:7950:6caa:fe23:3a22:b07e/64 scope global temporary dynamic 
       valid_lft 41316sec preferred_lft 18800sec
    inet6 2601:1c0:cf00:7950:70bd:c8b6:c6da:3a37/64 scope global temporary dynamic 
       valid_lft 41069sec preferred_lft 16396sec
    inet6 2001:468:d01:114:9d66:357d:196c:62d8/64 scope global temporary dynamic 
       valid_lft 534197sec preferred_lft 15747sec
    inet6 2001:468:d01:114:94a0:1926:37ca:b16f/64 scope global temporary dynamic 
       valid_lft 534161sec preferred_lft 15711sec
    inet6 2001:468:d01:114:2c39:747b:3f23:694/64 scope global temporary dynamic 
       valid_lft 534105sec preferred_lft 15655sec
    inet6 2601:1c0:cf00:7950:ec38:c2ff:cf58:4b95/64 scope global temporary deprecated dynamic 
       valid_lft 129404sec preferred_lft 0sec
    inet6 2601:1c0:cf00:7950:ea0e:df7a:6ea4:658b/64 scope global temporary deprecated dynamic 
       valid_lft 91365sec preferred_lft 0sec
    inet6 2601:1c0:cf00:7950:bc49:3267:c7f9:7337/64 scope global temporary deprecated dynamic 
       valid_lft 21111sec preferred_lft 0sec
    inet6 2601:1c0:cf00:7950:601:bac3:ce5d:fe68/64 scope global temporary deprecated dynamic 
       valid_lft 91215sec preferred_lft 0sec
    inet6 2601:1c0:cf00:7950:5541:d30f:3e90:6ec9/64 scope global temporary deprecated dynamic 
       valid_lft 82883sec preferred_lft 0sec
    inet6 2601:1c0:cf00:7950:ad93:d978:8865:d717/64 scope global temporary deprecated dynamic 
       valid_lft 79553sec preferred_lft 0sec
    inet6 2601:1c0:cf00:7950:fb99:85d2:cebb:b535/64 scope global temporary deprecated dynamic 
       valid_lft 75018sec preferred_lft 0sec
    inet6 2601:1c0:cf00:7950:52ca:1f29:8435:6655/64 scope global temporary deprecated dynamic 
       valid_lft 60517sec preferred_lft 0sec
    inet6 2601:1c0:cf00:7950:f387:1adf:dfcd:2afd/64 scope global temporary deprecated dynamic 
       valid_lft 44930sec preferred_lft 0sec
    inet6 2601:1c0:cf00:7950:97c3:8475:7a72:3783/64 scope global temporary deprecated dynamic 
       valid_lft 41316sec preferred_lft 0sec
    inet6 2601:1c0:cf00:7950:a9de:f6aa:e70d:676d/64 scope global temporary deprecated dynamic 
       valid_lft 41069sec preferred_lft 0sec
    inet6 2001:468:d01:114:daf4:dce2:5536:6c9c/64 scope global temporary deprecated dynamic 
       valid_lft 447850sec preferred_lft 0sec
    inet6 2001:468:d01:114:611a:ddd:dfab:606f/64 scope global temporary deprecated dynamic 
       valid_lft 447814sec preferred_lft 0sec
    inet6 2001:468:d01:114:35b6:5675:a237:27ae/64 scope global temporary deprecated dynamic 
       valid_lft 447758sec preferred_lft 0sec
    inet6 2601:1c0:cf00:7950:d351:443d:e988:3bfc/64 scope global temporary deprecated dynamic 
       valid_lft 21111sec preferred_lft 0sec
    inet6 fe80::d2ab:d5ff:febb:4b12/64 scope link 
       valid_lft forever preferred_lft forever
3: enp0s31f6: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether <mac-addr> brd ff:ff:ff:ff:ff:ff
    inet 192.168.2.1/24 scope global enp0s31f6
       valid_lft forever preferred_lft forever
    inet 192.168.2.10/24 brd 192.168.2.255 scope global secondary dynamic noprefixroute enp0s31f6
       valid_lft 86156sec preferred_lft 75368sec
    inet6 fe80::9afa:9bff:fe34:7eb3/64 scope link 
       valid_lft forever preferred_lft forever
5: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default 
    link/ether 02:42:b2:cb:2c:dc brd ff:ff:ff:ff:ff:ff
    inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0
       valid_lft forever preferred_lft forever
    inet6 fe80::42:b2ff:fecb:2cdc/64 scope link 
       valid_lft forever preferred_lft forever
10: vboxnet0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN group default qlen 1000
    link/ether 0a:00:27:00:00:00 brd ff:ff:ff:ff:ff:ff
    inet 192.168.56.1/24 scope global vboxnet0
       valid_lft forever preferred_lft forever

3. output of ip addr from other device (ODROID C2 this time, but same issue)

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether <mac-addr> brd ff:ff:ff:ff:ff:ff
    inet 192.168.2.13/24 brd 192.168.2.255 scope global dynamic noprefixroute eth0
       valid_lft 86358sec preferred_lft 75558sec
    inet6 fe80::21e:6ff:fe33:fa18/64 scope link 
       valid_lft forever preferred_lft forever

Let me know if you have any idea what might be going on.

Thanks! Oliver

[stanipintjuk]

Sorry for late response

I don't see an immediate problem anywhere. Your interface wlp0s20f3 looks interesting though. Are you on a VPN?