Patrick Dupre:
> Yes the schamatics is correct.
> I set the gateway and now it works.
>
> Now
> 1) I wish to use internet from PC A.
> I guess that I need to set a name server
> But not possible manually
Presuming that you just mean for using the internet... If internet
sharing is working, then tell A to use the same name server that is
working on B.
> 2) How do I need to set for PC 3
> From PC A
> From PC C
> I tried several things but none works
PC 3? You're adding a third PC into this mixture?
If B was your gateway, and it had an extra spare ethernet port. Any
other approach would become a Frankenstein's monster of a network.
--------- ------------- ----------
I am currently horsing around with a Frankenetwork at the moment,
somewhat similar to yours, thanks to my Fibre-to-the-house ISP becoming
greedy and my dropping them. Likewise it's a temporary thing, though
saving $60 to $80 a month is looking good, right now.
I have a mobile phone which can act as a wireless access point, and
various devices around my house are using it as one. I only had to
switch on Mobile Hotspot on the phone for it to act that way. I set
its SSID to be the same as my former network, and the WiFi devices
around the house are happy.
And I plug a desktop PC into the phone's USB port. I only had to
switch on USB tethering on the phone, and the (ye olde CentOS) PC
figured out what to do by itself, likewise if I do that with a Fedora
PC, but an old Mac flatly refuses to do that (the phone is Android, and
Apple are deliberately obstinate on not co-operating with non-Apple).
Things mostly work fine, apart from being double-natted (the phone and
the phone service provider), and that's only one PC at a time.
The hard parts about doing this, are:
* The phone only supports up to 10 devices going through it (and there
were more than 10 gadgets on my former wireless LAN).
* The phone service provider uses CGNAT (so I can't FTP into things).
* There's several non-WiFi devices, and my ye old CentOS server
doesn't want to share the phone's internet service out its ethernet
connection.
* All the desktop devices are still ethernet cabled together, so LAN
work still works, but connecting the phone to one of them takes over
from my DNS server and uses the phone as the DNS server sometimes
and sometimes not. So you get either no local name resolution or no
internet name resolution, until I fiddle with disconnecting and
reconnecting things via desktop manager.
Dunno why my server doesn't want to co-operate with internet sharing,
I've done that kind of thing before (with dial-up modem on the serial
port). I settled for running Squid on that box, and the other
computers can browse the net using it as a HTTP proxy.
But this kind of thing is messy and fragile (and temporary). Life's
much easier with a proper internet service going into a router. WiFi
and ethernet routers are quite cheap, now, probably on a par with a
WiFi dongle. In my case, all I have to do is find a new ISP that I'm
happy with (acceptable pricing and service levels, with a proper real
public IP, and preferably FTTP not 5G).
We wouldn't have this no-public-IP problem if everyone had got their
act together and set up IPv6 properly. But our ISPs would rather faff
around with *very* limited CGNAT (my router used NAT, and I could
always FTP through that without having to do anything special). My
former ISP had IPv6 when I first joined, then a couple of months in
they removed it, and remotely reconfigured the supplied modem/router
combo to disable it.
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