[Xymon] host with multiple addresses, not all active or known in advance

Jeremy Laidman jlaidman at rebel-it.com.au
Mon Aug 31 04:22:27 CEST 2015


Are you trying to find a way for your Xymon server to send network test
packets to your laptop?  Or are you wanting your laptop's
disk/cpu/memory/etc resources to show on the Xymon server?

I'm not familiar with "back to my mac".

One challenge you have is that client messages are going to be rejected
unless the IP address is in hosts.cfg, and if you're travelling, you
probably won't have a static IP address on your laptop.  Another challenge
is being able to locate your router, which may have a moving IP(v6) address.

If you're able to do dynamic DNS to register a name for your laptop, and if
you can ssh from your Xymon server to your laptop while on the road, then
you have a few options available to you.  One option is to ssh in as the
xymon user with a reverse tunnel, setup XYMSRV as, and XYMONDPORT
as the reverse tunnel port, and then run ~xymon/client/bin/xymonclient.sh.
Another option is to use xymon-rclient, which doesn't even need the xymon
client installed (although it doesn't support some features):



On 29 August 2015 at 09:40, Richard L. Hamilton <rlhamil2 at gmail.com> wrote:

> I have a home network, and a laptop.  At home, the laptop has (whether
> statically or via DHCP) a fixed non-routable private IP address.  On the
> road, once I get my router's IPv6 support working, it may have an IPv6
> address with probably a variable /64 prefix.
> I know about "dialup", useful for a device where it's normal if it's not
> connected all the time.  But how can I best make the multiple IP address
> situation work for a single Xymon entry, esp. given that I may have no
> control of the IPv6 prefix.  I do have "Back To My Mac" tunneling...but the
> xymon server is not a Mac (actually, it's a domain running Solaris on a Sun
> T5240), although if I could set up something that was forwarding-only on a
> Mac desktop client, that might let me set up the laptop to report to that
> Mac via the tunnel.  Not sure what my prospects are setting up an inbound
> tunnel using a D-Link router (evidently with the help of one of the
> clients, since the full tunnel setup is beyond the D-Liink's capability.
> Pretty sure it can set up an outbound tunnel, not so sure what it can do
> for an inbound one, even with suitable inbound NAT entry and support from
> one of the client systems).
> Right now, my Mac doesn't appear on my Xymon at all.  I'd like it to
> appear, and might even add a "location" column with client-side process, so
> it's whereabouts can be tracked independently of Apple's facilities to find
> a missing mobile device.  I think I know how to do the latter, save that
> the sample code I have for using a Mac's "Location Services" does not
> convert decimal coordinates to human-readable degrees, minutes, seconds,
> nor to nearest placename + azimuth/range offset.
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