On 12/29/18 5:51 AM, fatal wrote:
Dear Yalang, that did the trick. If I look in the NAT table of the bridge I can see the generated rules. Probably wouldn't have though about that ever.
Yes, it is fairly strange that rules to filter traffic are in a table called "nat". My understanding is that it was implemented this way in order to avoid duplicating all the rules in both the input and forward chains (or something like that).
Thanks a lot! Best Sam On 29.12.18 06:51, Yalan Zhang wrote:Hi Sam, You can find the rules by below command, and it looks as below: # ebtables -t nat --list Bridge table: nat Bridge chain: PREROUTING, entries: 2, policy: ACCEPT -j PREROUTING_direct -i vnet0 -j libvirt-I-vnet0 Bridge chain: OUTPUT, entries: 1, policy: ACCEPT -j OUTPUT_direct Bridge chain: POSTROUTING, entries: 2, policy: ACCEPT -j POSTROUTING_direct -o vnet0 -j libvirt-O-vnet0 Bridge chain: PREROUTING_direct, entries: 0, policy: RETURN Bridge chain: POSTROUTING_direct, entries: 0, policy: RETURN Bridge chain: OUTPUT_direct, entries: 0, policy: RETURN Bridge chain: libvirt-I-vnet0, entries: 9, policy: ACCEPT -j I-vnet0-mac -p IPv4 -j I-vnet0-ipv4-ip -p IPv4 -j ACCEPT -p ARP -j I-vnet0-arp-mac -p ARP -j I-vnet0-arp-ip -p ARP -j ACCEPT -p 0x8035 -j I-vnet0-rarp -p 0x835 -j ACCEPT -j DROP Bridge chain: libvirt-O-vnet0, entries: 4, policy: ACCEPT -p IPv4 -j O-vnet0-ipv4 -p ARP -j ACCEPT -p 0x8035 -j O-vnet0-rarp -j DROP Bridge chain: I-vnet0-mac, entries: 2, policy: ACCEPT -s 52:54:0:3a:40:b7 -j RETURN -j DROP Bridge chain: I-vnet0-ipv4-ip, entries: 3, policy: ACCEPT -p IPv4 --ip-src 0.0.0.0 --ip-proto udp -j RETURN -p IPv4 --ip-src 172.16.1.2 -j RETURN -j DROP Bridge chain: O-vnet0-ipv4, entries: 1, policy: ACCEPT -j ACCEPT Bridge chain: I-vnet0-arp-mac, entries: 2, policy: ACCEPT -p ARP --arp-mac-src 52:54:0:3a:40:b7 -j RETURN -j DROP Bridge chain: I-vnet0-arp-ip, entries: 2, policy: ACCEPT -p ARP --arp-ip-src 172.16.1.2 -j RETURN -j DROP Bridge chain: I-vnet0-rarp, entries: 2, policy: ACCEPT -p 0x8035 -s 52:54:0:3a:40:b7 -d Broadcast --arp-op Request_Reverse --arp-ip-src 0.0.0.0 --arp-ip-dst 0.0.0.0 --arp-mac-src 52:54:0:3a:40:b7 --arp-mac-dst 52:54:0:3a:40:b7 -j ACCEPT -j DROP Bridge chain: O-vnet0-rarp, entries: 2, policy: ACCEPT -p 0x8035 -d Broadcast --arp-op Request_Reverse --arp-ip-src 0.0.0.0 --arp-ip-dst 0.0.0.0 --arp-mac-src 52:54:0:3a:40:b7 --arp-mac-dst 52:54:0:3a:40:b7 -j ACCEPT -j DROP For interface set as: <interface type='bridge'> <mac address='52:54:00:3a:40:b7'/> <source bridge='br0'/> <target dev='vnet0'/> <model type='rtl8139'/> <filterref filter='clean-traffic'> <parameter name='IP' value='172.16.1.2'/> </filterref> <alias name='net0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> ------- Best Regards, Yalan Zhang IRC: yalzhang_______________________________________________ libvirt-users mailing list libvirt-users@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvirt-users
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