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Re: How do I connect my new wifi router (Mi Router 4C)?

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On 08/11/2023 20:39, Martin wrote:
> Here is output from phone connected to WiFi setup program:
> Default gateway: 192.168.231.3

It seems dnsmasq is able to serve reasonable settings with minimal 
configuration.

>          chain postrouting {
>                  type nat hook postrouting priority srcnat; policy accept;
>                  ip saddr 192.168.231.0/24 oifname "wlxe8de27a5ab1c" masquerade

You had a rule that was working for you.

I do not see obvious issues with this one besides docker0 instances are 
likely inaccessible from the phone.

> 10:47:52.614642 enp3s0 In  IP 192.168.231.243.48257 > 192.168.231.3.53: 29809+ A? www.google.com. (32)
> 10:47:52.614851 wlxe8de27a5ab1c Out IP 192.168.0.16.34673 > 81.24.247.14.53: 10155+ A? www.google.com. (32)
> 10:47:52.614902 wlxe8de27a5ab1c Out IP 192.168.0.16.34673 > 81.24.247.44.53: 10155+ A? www.google.com. (32)
> 10:47:52.791389 wlxe8de27a5ab1c In  IP 81.24.247.14.53 > 192.168.0.16.34673: 10155 1/0/0 A 142.251.208.132 (62)
> 10:47:52.791559 enp3s0 Out IP 192.168.231.3.53 > 192.168.231.243.48257: 29809 1/0/0 A 142.251.208.132 (62)
> 10:47:52.794704 enp3s0 In  IP 192.168.231.243.46639 > 142.251.208.132.80: Flags [S], seq 4183167263, win 29200, options [mss 1460,sackOK,TS val 19413 ecr 0,nop,wscale 6], length 0
> 10:47:52.846385 enp3s0 In  IP 192.168.231.243.46640 > 142.251.208.132.80: Flags [S], seq 1626803236, win 29200, options [mss 1460,sackOK,TS val 19418 ecr 0,nop,wscale 6], length 0

Since packets from wlxe8de27a5ab1c to 142.251.208.132:80 are missed, 
perhaps IP forwarding is disabled or there is a blocking forwarding rule 
in the firewall. If I am not wrong, masquerading should affect source IP 
address of forwarded packets, but not their presence.

>> Warning: if you have not configured network interfaces for DHCP in dnsmasq
>> then do it. Otherwise other computers connected to the upstream WiFi link
>> may receive DHCP leases emitted from wlxe8de27a5ab1c.
> 
> Only thing I added to dnsmasq configuration is one line in
> /etc/dnsmasq.d/myHomeDHCPrange file:
> dhcp-range=192.168.231.241,192.168.231.254,12h

Dnsmasq may be smart enough to not send DHCP leases to interfaces with 
addresses inconsistent with the specified range, but I would still limit 
interfaces that dnsmasq listens to.

On 08/11/2023 21:30, Anssi Saari wrote:
> 
> systemctl start nftables.service
> 
> So if you're experimenting, you edit /etc/nftables.conf and after
> editing run systemctl restart nftables.service

And be prepared that this command flushes away rules added by docker. It 
is a reason why earlier I suggested to create a dedicated file that may 
reload specific set of rules using "nft -f".

Current set of rules is more important than state of the service.

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Thread

How do I connect my new wifi router (Mi Router 4C)? Martin <martin94@cryptolab.net> - 2023-10-25 06:20 +0200
  Re: How do I connect my new wifi router (Mi Router 4C)? Geert Stappers <stappers@stappers.nl> - 2023-10-25 07:00 +0200
    Re: How do I connect my new wifi router (Mi Router 4C)? Martin <martin94@cryptolab.net> - 2023-10-25 07:50 +0200
  Re: How do I connect my new wifi router (Mi Router 4C)? "Marco M." <mm@dorfdsl.de> - 2023-10-25 07:30 +0200
    Re: How do I connect my new wifi router (Mi Router 4C)? Martin <martin94@cryptolab.net> - 2023-10-25 08:50 +0200
      Re: How do I connect my new wifi router (Mi Router 4C)? "Marco M." <mm@dorfdsl.de> - 2023-10-25 08:50 +0200
        Re: How do I connect my new wifi router (Mi Router 4C)? Martin <martin94@cryptolab.net> - 2023-10-25 13:40 +0200
          Re: How do I connect my new wifi router (Mi Router 4C)? "Marco M." <mm@dorfdsl.de> - 2023-10-25 14:20 +0200
            Re: How do I connect my new wifi router (Mi Router 4C)? Martin <martin94@cryptolab.net> - 2023-10-25 22:20 +0200
  Re: How do I connect my new wifi router (Mi Router 4C)? Anssi Saari <anssi.saari@debian-user.mail.kapsi.fi> - 2023-10-25 10:10 +0200
    Re: How do I connect my new wifi router (Mi Router 4C)? Max Nikulin <manikulin@gmail.com> - 2023-10-25 10:20 +0200
      Re: How do I connect my new wifi router (Mi Router 4C)? Martin <martin94@cryptolab.net> - 2023-10-25 13:30 +0200
        Re: How do I connect my new wifi router (Mi Router 4C)? Max Nikulin <manikulin@gmail.com> - 2023-10-25 14:40 +0200
          Re: How do I connect my new wifi router (Mi Router 4C)? Martin <martin94@cryptolab.net> - 2023-10-25 21:30 +0200
            Re: How do I connect my new wifi router (Mi Router 4C)? Max Nikulin <manikulin@gmail.com> - 2023-10-26 05:00 +0200
              Re: How do I connect my new wifi router (Mi Router 4C)? Martin <martin94@cryptolab.net> - 2023-10-26 12:10 +0200
                Re: How do I connect my new wifi router (Mi Router 4C)? Max Nikulin <manikulin@gmail.com> - 2023-10-26 17:10 +0200
                Re: How do I connect my new wifi router (Mi Router 4C)? Martin <martin94@cryptolab.net> - 2023-11-04 20:10 +0100
                Re: How do I connect my new wifi router (Mi Router 4C)? Tixy <tixy@yxit.co.uk> - 2023-11-05 07:50 +0100
                Re: How do I connect my new wifi router (Mi Router 4C)? Max Nikulin <manikulin@gmail.com> - 2023-11-05 17:00 +0100
                Re: How do I connect my new wifi router (Mi Router 4C)? Martin <martin94@cryptolab.net> - 2023-11-08 14:50 +0100
                Re: How do I connect my new wifi router (Mi Router 4C)? Anssi Saari <anssi.saari@debian-user.mail.kapsi.fi> - 2023-11-09 11:30 +0100
                Re: How do I connect my new wifi router (Mi Router 4C)? Max Nikulin <manikulin@gmail.com> - 2023-11-09 15:50 +0100
                Re: How do I connect my new wifi router (Mi Router 4C)? Martin <martin94@cryptolab.net> - 2023-11-05 22:50 +0100
                Re: How do I connect my new wifi router (Mi Router 4C)? Anssi Saari <anssi.saari@debian-user.mail.kapsi.fi> - 2023-11-05 09:30 +0100
                Re: How do I connect my new wifi router (Mi Router 4C)? Martin <martin94@cryptolab.net> - 2023-11-05 22:50 +0100
    Re: How do I connect my new wifi router (Mi Router 4C)? David Wright <deblis@lionunicorn.co.uk> - 2023-10-26 01:30 +0200

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