IP-Spoofing

pascalku

Member
Mar 5, 2020
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0
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Hey there!

I am trying to prevent ip spoofing so my virtual machines can only claim ips I personally allowed them to use.

In my demonstration I am broadcasting on ipv4 "192.168.25.30/16" with ipv6 "2001:16b8:4fc:9300:7837:a0ff:fea5:7958" and try to claim the forbidden "192.168.25.31". The current configuration inside the virtual machine looks like this:
Bildschirmfoto 2020-06-08 um 21.41.52.png

Now I am struggling how to configure the host or the proxmox side firewall to the guest.
Firewall Options:
Bildschirmfoto 2020-06-08 um 21.42.47.pngBildschirmfoto 2020-06-08 um 21.43.13.png

I expected that the addresses listed in ipfilter-net0 would be available and the machine could be accessed via these addresses. Instead, I unfortunately have to realize that I can only access my machine via the .30 IPv4.

Hopefully anyone got an idea.