I have a Ubuntu 20.04 physical host running a Windows 7 x64 virtual guest connected to a Technicolor cable modem. I am posting this question via the virtual machine; however; the physical machine cannot see the internet.
Would this be due to the ISP filtering mac addies? They started filtering the physical host's addy but not knowing the VM's it is able to connect? This is driving me crazy, any ideas?
VM sees LAN & WAN, PH sees only LAN
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TomKat
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VM sees LAN & WAN, PH sees only LAN
Last edited by TomKat on 24. Mar 2021, 14:40, edited 1 time in total.
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mpack
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Re: VM sees network, PH does not
Obviously, it's because you don't have two valid and compatible networking configurations. Beyond that it's impossible to say since you provide no data.
It will not be due the ISP filtering MACs, unless you have a strange contract that only allows one device. And also because the ISP doesn't see MACs. MACs are an Ethernet thing.
If you gave two PCs (virtual or not) the same MAC then it would certainly confuse a home router.
It will not be due the ISP filtering MACs, unless you have a strange contract that only allows one device. And also because the ISP doesn't see MACs. MACs are an Ethernet thing.
If you gave two PCs (virtual or not) the same MAC then it would certainly confuse a home router.
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TomKat
- Posts: 2
- Joined: 24. Mar 2021, 09:41
- Primary OS: Linux other
- VBox Version: OSE Debian
- Guest OSses: Ubuntu 20.04, Win10, 7, & XP
Re: VM sees LAN & WAN, PH sees only LAN
My cable modem is 192.168.0.1 on the LAN, it's a spectrum IP addy on the WAN, and the next good hop is a spectrum switch sitting in Alabama. My host had connectivity to the Internet until yesterday, then all of the sudden it's gone). I have eliminated a distribution switch and plugged the host directly into one of the cable modem's four LAN ports. The VM (this machine 192.168.0.14) is sitting on the physical host (192.168.0.200). The path would be 192.168.0.14 -> 192.168.0.200 -> 192.168.0.1 -> ISP's IP addy and on. The .14 sees the internet, the .200 does not. Everything on the LAN masks with 255.255.255.0 and sees 192.168.0.1 as the gateway. The physical machines mac addy prefix is 309c23 and the vm's is 080027. Additionally, .14 and .200 do not see each other but both see other IP addies on the LAN e.g. 192.168.0.150 (a printer) and 192.168.0.171 (a NAS), furthermore the software firewalls on both the host and the VM have been turned off.
Additional testing demonstrates several other virtual machines (192.168.0.18 and 192.168.0.19) both have LAN and WAN visibility. So the only failure is the physical host's failure to see the WAN. Why do VMs on this PH see the WAN but the PH does not?
Is that enough information? Sorry, I'm not a networking expert.
Additional testing demonstrates several other virtual machines (192.168.0.18 and 192.168.0.19) both have LAN and WAN visibility. So the only failure is the physical host's failure to see the WAN. Why do VMs on this PH see the WAN but the PH does not?
Is that enough information? Sorry, I'm not a networking expert.