Proxmox Firewall not working

[ccube]

I have a weird problem with the proxmox integrated firewall. It seems quite unreliable. My setup is one proxmox server and two VMs. One of which has an activated firewall, the other hasn't. (Using iptables by itself). Host is using firewall, too.

See screenshots for VMs firewall configuration. (Default Policy DROP). Portmapper DROP.

But using rpcinfo from an outside network reveals me alot of information. Also nmap shows me port 111 as open!

AFAIK, It did work until I updated to PVE 5.1

Is this a bug, or configuration issue on my side?

[le@w530]: ~>$ rpcinfo -p virtualmachine1
program vers proto   port  service
    100000    4   tcp    111  portmapper
    100000    3   tcp    111  portmapper
    100000    2   tcp    111  portmapper
    100000    4   udp    111  portmapper
    100000    3   udp    111  portmapper
    100000    2   udp    111  portmapper
    100005    1   udp  20048  mountd
    100005    1   tcp  20048  mountd
    100005    2   udp  20048  mountd
    100005    2   tcp  20048  mountd
    100005    3   udp  20048  mountd
    100005    3   tcp  20048  mountd
    100024    1   udp  42779  status
    100024    1   tcp  50347  status
    100003    3   tcp   2049  nfs
    100003    4   tcp   2049  nfs
    100227    3   tcp   2049  nfs_acl
    100021    1   udp  41379  nlockmgr
    100021    3   udp  41379  nlockmgr
    100021    4   udp  41379  nlockmgr
    100021    1   tcp  45939  nlockmgr
    100021    3   tcp  45939  nlockmgr
    100021    4   tcp  45939  nlockmgr