[HECnet] HecNET via 3G Dongle

[Brian Hechinger]

I forget, does the bridge use tcp or udp?

Does the bridge program tell you anything?

-brian

On Sep 13, 2011, at 19:09, Mark Wickens <mark at wickensonline.co.uk> wrote:

Well,

After a very convoluted route I've got my draytek router up and running with a 3G dongle. I can browser the internet, use telnet etc, but it appears the bridge traffic is not getting through.

$$ dir mim::
%DIRECT-E-OPENIN, error opening MIM::*.*;* as input
-RMS-E-FND, ACP file or directory lookup failed
-SYSTEM-F-UNREACHABLE, remote node is not currently reachable

If I manually try and telnet to psilo.update.uu.se port 4711 I get a network is unreachable. If I ping the same address the ping gets through.

Is this something to do with a restriction on port numbers? Is there anything we can do about this, or try?

Thanks for the help,

Mark.

Here's a transcript of what I tried. I can also use ssh   no problems.

atom:/usr/local/bridge# telnet psilo.update.uu.se 4711
Trying 130.238.19.25...
Trying 2001:6b0:b:fff0::19...
telnet: Unable to connect to remote host: Network is unreachable
atom:/usr/local/bridge# ping 130.238.19.25
PING 130.238.19.25 (130.238.19.25) 56(84) bytes of data.
64 bytes from 130.238.19.25: icmp_seq=1 ttl=47 time=132 ms
64 bytes from 130.238.19.25: icmp_seq=2 ttl=47 time=128 ms
64 bytes from 130.238.19.25: icmp_seq=3 ttl=47 time=134 ms

On 11/09/2011 20:52, Johnny Billquist wrote:
On 2011-09-11 21.45, Mark Wickens wrote:
Guys,

Looking to tap into your collective knowledge.

I'd like to set up a 3G dongle for the DEC Legacy event.

The plan will be to add my machine as an area router then other
participants machines into that area.

Steve Davidson has pointed out that there are decnet numbers allocated
for experimental purposes.

I think I understand how to setup my 3G dongle to connect to the
internet via an ubuntu machine. I am happy setting up a DHCP and DNS
server on the same machine. The bit I don't understand is how I would
fit the hecnet bridge into this network. Normally on my DSL router I
have a port redirection rule setup on port 4711 to point to a Debian
based box on my LAN.

How would I achieve the same effect on a linux box? If I run the bridge
on the same box, does this negate the need for a rule?

If all this works, is there a restriction of one decnet area per lan
segment? Can I run two areas on my side of the bridge?

Thanks for the help, Mark

In general, if/when you have a setup like that, it's the same as if you connect your computer directly to the internet. So, your Linux box is at the same location your DSL router is. So, there are no rules to setup to pass a packet through the router. The reason for the rule is that your DSL router acts as a firewall (and possibly NAT), which is what you need to circumvent for the bridge. No firewall/NAT box in between means no need to punch a hole through it.

So you should be able to run the bridge directly on that box, and it should work. All however, also depends on what your mobile operator might be doing...

Area number for experimental is probably not going to help you, though. You already have an area. Adding more nodes to it is hardly any different than having a new area setup, except that if you setup a new area, you will need an area router for it. I don't really see much point in the "experimental" area we have reserved, but since we have plenty of areas anyway, there is no harm in it. Anyone using that area can expect things to not work though, as someone else might also be using the same area, and conflict/confusion might follow.

As for having several different areas on the same lan, no problem.

    Johnny