Windows Guest with weird internet issues (possible lack of support for http2)

mike86

New Member
Oct 10, 2022
2
0
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Some of websites will return this:
ERR_HTTP2_PROTOCOL_ERROR

Some others like i.e. Azure DevOps won't load properly login screen with F2A (just err timeouts for js/css).

In case of HTTP2 the host cannot load the content via curl, but in regards to Azure it can load content that failed on guest.

I cannot find too much info about what I supposed to add to allow everything working perfectly fine as on bare metal windows machine (same links are working on other machines/vmware).
It is proxmox 7, few days old (I am trying to move from esxi)

Here is my network config (firewalls are disabled)


Code:
auto lo
iface lo inet loopback

iface lo inet6 loopback

auto eno1
iface eno1 inet manual
        up route add -net XXXXXXX

netmask 255.255.255.224
gw XXXXXXX dev eno1
# route XXXXXX/27 via XXXXXXXX

auto eno1.4000
iface eno1.4000 inet manual
        mtu 1400

iface eth0 inet manual

auto vmbr0
iface vmbr0 inet static
        address XXXXXXX/27
        gateway XXXXXXX
        bridge-ports eno1
        bridge-stp off
        bridge-fd 0

auto vmbr1
iface vmbr1 inet static
        address 10.254.254.254/8
        bridge-ports none
        bridge-stp off
        bridge-fd 0
        post-up echo 1 > /proc/sys/net/ipv4/ip_forward
        post-up iptables -t nat -A POSTROUTING -s '10.0.0.0/8' -o vmbr0 -j MASQUERADE
        post-up iptables -A POSTROUTING -t nat -s 10.0.0.0/8 -j MASQUERADE
        post-down iptables -t nat -D POSTROUTING -s '10.0.0.0/8' -o vmbr0 -j MASQUERADE


auto vmbr2
iface vmbr2 inet static
        address 192.168.0.100/8
        bridge-ports eno1.4000
        bridge-stp off
        bridge-fd 0