VM guest cannot reach host

[stadin]

I have a rather simple setup with 2 physical servers running Proxmox as a tiny cluster. My problem is that I cannot reach either of proxmox hosts from a guest VM - other than via ping. The obvious firewall rules on the machines are set correctly, e.g. I can make a wget to https://host1:8006 from host2. Doing the same from a VM runs into a timeout, and I've looker quite everywhere to figure out what is blocking the request already.

My best guess is hat it is related to the bridge configuration?

Here is my network setup for the proxmox host (they look identical besides the IP for host 1 and host 2):

source /etc/network/interfaces.d/*

auto lo
iface lo inet loopback

auto enp193s0
iface enp193s0 inet static
        address  10.24.0.4/24
        gateway  10.24.0.1
        pointopoint 10.24.0.1
        up route add -net 10.24.0.0/24 gw 10.24.0.1 dev enp193s0

auto vmbr0
iface vmbr0 inet static
        address 10.24.0.5/24
        pointopoint 10.24.0.1
        gateway 10.24.0.1
        bridge_ports enp193s0
        bridge_stp off
        bridge_fd 0
        up sysctl -w net.ipv4.ip_forward=1
        pointopoint 10.24.0.1
        up sysctl -w net.ipv4.conf.enp193s0.send_redirects=0