[SOLVED] How to forward traffic from vmbr0 to tap100i0

TomFreudenberg

New Member
Feb 4, 2020
17
0
1
Hamburg, Germany
When using tcpdump on proxmox host console and checking the interface vmbr0 while running "ping 8.8.8.8" inside a Debian VM, I see all the OUTGOING and INCOMING packets from VM and 8.8.8.8 responses.

Code:
17:18:04.854175 IP 44.55.66.16 > 8.8.8.8: ICMP echo request, id 1439, seq 1, length 64
17:18:04.876269 IP 8.8.8.8 > 44.55.66.16: ICMP echo reply, id 1439, seq 1, length 64
17:18:05.862521 IP 44.55.66.16 > 8.8.8.8: ICMP echo request, id 1439, seq 2, length 64
17:18:05.885419 IP 8.8.8.8 > 44.55.66.16: ICMP echo reply, id 1439, seq 2, length 64
But when looking on tap100i0 I just see the OUTGOING requests

Code:
17:18:04.854175 IP 44.55.66.16 > 8.8.8.8: ICMP echo request, id 1439, seq 1, length 64
17:18:05.862521 IP 44.55.66.16 > 8.8.8.8: ICMP echo request, id 1439, seq 2, length 64
For that reason, the VM does not get any returning packets.

Do I need to enter some iptables / ebtables rule to FORWARD the traffic from vmbr0 to tap105i0?

Currently all kind of firewall settings etc. are disabled on proxmox server. iptables and ebtables are with no rules!

Would be really happy if someone may help
Thanks, Tom
 

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