[SOLVED] no DNS inside virtual guest

[gnomegemini]

Hi there,

I have installed pve on an host for a gaming clan and the dns resolution is failing.

interfaces on pve host:

auto lo
iface lo inet loopback

auto enp2s0
iface enp2s0 inet static
  address 148.251.153.91
  netmask 255.255.255.224
  gateway 148.251.153.65
  # route 148.251.153.64/27 via 148.251.153.65
  up route add -net 148.251.153.64 netmask 255.255.255.224 gw 148.251.153.65 dev enp2s0
  post-up echo 1 > /proc/sys/net/ipv4/conf/enp2s0/proxy_arp

auto vmbr1
iface vmbr1 inet static
  address 10.0.0.1
  netmask 255.255.255.0
  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 '10.0.0.0/24' -o enp2s0 -j MASQUERADE
  post-down iptables -t nat -D POSTROUTING -s '10.0.0.0/24' -o enp2s0 -j MASQUERADE

On guest side (CentOS 7 minimal install) I use 10.0.0.100 as IP 10.0.0.1 as gateway and 8.8.8.8 and 8.8.4.4 as nameservers which are also included in resolv.conf.

I can reach all IP's on the net but there is no name resolving. ping 8.8.8.8 is working ping google.de not:
"ping: google.de: Name or service not known"

Any ideas what I could have missed here?

Thanks and kind regards,
Stefan


Edit: works now. I disabled the firewall from the ISP which was blocking this.