How to allow broadcase VM IP in PVE Cluster Firewall

chengkinhung

Active Member
Feb 11, 2016
38
5
28
22
Hi, Guys, I just enable the PVE Cluster Firewall , and found there is one default rules on Chain PVEFW-smurfs and PVEFW-smurflog blocked some of broadcast network packages, it me caused my load balancer IP setup in VM encounter issue, could any one tell how can I disable this rules or modify it ? Thanks.

Here is iptables Chain PVEFW-smurfs and PVEFW-smurflog :
Code:
# iptables -n -v -L PVEFW-smurfs
Chain PVEFW-smurfs (2 references)
 pkts bytes target     prot opt in     out     source               destination
15131 5268K RETURN     all  --  *      *       0.0.0.0              0.0.0.0/0
    0     0 PVEFW-smurflog  all  --  *      *       0.0.0.0/0            0.0.0.0/0           [gotYPE match src-type BROADCAST
    0     0 PVEFW-smurflog  all  --  *      *       224.0.0.0/4          0.0.0.0/0           [got
1015K   60M            all  --  *      *       0.0.0.0/0            0.0.0.0/0            /* PVESICBXd5mc9kC88749+7fag */

Chain PVEFW-smurflog (2 references)
 pkts bytes target     prot opt in     out     source               destination
    0     0 DROP       all  --  *      *       0.0.0.0/0            0.0.0.0/0
    0     0            all  --  *      *       0.0.0.0/0            0.0.0.0/0            /* PVESIG:2gfT1VMkfr0JL6OccRXTGXo+1qk */
 

fabian

Proxmox Staff Member
Staff member
Jan 7, 2016
8,144
1,588
164
on the host level you can configure whether SMURFS filtering is enabled or not..
 

chengkinhung

Active Member
Feb 11, 2016
38
5
28
22
Hi, @fabian , thanks for your reply. I found the "SMURFS filter" option in Firewall of Host node. I also added the "nf_conntrack_allow_invalid: 1" into /etc/pve/nodes/NODE/host.fw
 
Last edited:

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