Accessing a service from guest to host

[TheDarkTrumpet]

Good afternoon everyone,

I'm running into a weird issue that I'm unsure what to do.  There's plenty of information about accessing a service that's running on a guest (e.g. ssh), but not the other way around.

Host: OSX Senoma

Guest: Ubuntu (Server + ARM)

On the host, I have a service that's running on port 7860, and I'd like to access it on the guest.  I'd like to avoid accessing it via a more "public" url.  For example, if my IP address, internal to my network, is 192.168.1.5, I don't want to access it via http://192.168.1.5:7860.  What I'd like to do, instead, is access it over the private host-only network. For example, on my mac I have the. following IP address bound to 172.16.126.1.  In the guest, that IP address is 172.16.126.1228.  I'd like to access the service via http://172.16.126.1:7860

I've verified the service I'm running is listening on all hosts (0.0.0.0), and I can access the URL via http://172.16.126.1:7860 on my mac.  I just can't access that URL via my virtual machine.  I've tried with/out firewall and little snitch on.

I should also add that I have multiple NICs in the VM.  I tried with disabling all but one of them, and that didn't work either.  Ping, though, does work fine.

Thanks

[Technogeezer]

I hope that 172.16.126.1228. is a typo as that's an illegal IPv4 address. 

My suspicion is that there's something up with your configuration. I just tried an ssh connection between my Ubuntu guest and host, and that has worked fine. So if a firewall isn't blocking the inbound connection, something else is awry. 

Have you tried a traceroute from both the guest to the host and host to the guest?

Is there any logging in your service that would complain of a connection from the guest getting dropped.

Could your service possibly be doing a reverse hostname lookup for the IP address of the guest, and then refusing it if the lookup fails (which it will)?