Am Fri, 19 Jan 2018 12:55:20 -0200 schrieb Michel von Behr
<michelb...@gmail.com>:
> Hi - rookie question: I have ADSL internet at home, distributed to
> local hosts via a cheap modem/router provided by the ISP. And
> connected as one of the network nodes is an old laptop running
> OpenBSD. I want to use that laptop as a webserver, ftp server, etc. I
> can connect to the laptop internally, from within the local network
> (192.168.15.11) via http, ssh, ftp, etc, but I can't see it from
> external hosts. I already tried different configurations in the
> router/modem related to port forwarding, NAT, but without success, so
> I'm starting to think that it might be something I'm missing on
> OpenBSD network config (PF maybe?).
>
> I tried enabling ip forwarding in sysctl but I still can't see it from
> outside hosts.
>
> Specifically, my question would be this: if I can see my laptop from
> within the local network, would that be enough to guarantee that I
> should be able to detect it externally?
No.
You have:
{ WAN (Internet) } <--> { Router } <--> { LAN (192.168.15.0) }
A host in WAN can only see your Router
you have to forward ports from {router} to {lan} but I wouldnt
recommend that.
Maybe read something about networking and NAT and such things to get a
deeper understanding? ;-)
