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Without tcpdump running, Linux bridge works selectively

Architecture: Ubuntu 14.04 as a libvirt/KVM host with one VM. There is bridge bri17 on the host, with two interfaces: eth2.17 (uplink to the Internet) and vnet0 (to the VM). Symptoms: all tests ...
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46 views

NATted host cannot talk to itself unless virbr0 is in promiscuous mode

We have the following situation: A hypervisor using KVM-Qemu/libvirt with a single VM. The VM has the internal IP 192.168.122.151 on the default network pool using virbr0 on the hypervisor. We've ...
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2answers
598 views

Promiscuous mode not working with ubuntu and wireshark [closed]

I am running Ubuntu Linux and have installed wireshark on it. I can see the incoming and outgoing traffic just fine. Now I want to see the traffic from other devices which are on my LAN. So, I did: ...
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41 views

Hyper-V and Openswan

I have Openswan on Hyper-V and I have notice that for every tunnel I have there is no route. So the tunnels are established, local pc can ping each other. With "ip xfrm policy" the policy are shown, ...
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0answers
231 views

Multicast works only in promiscuous mode

I'm trying to receive MPEG-TS over UDP multicast transport in Arch Linux. So when I run ffprobe -i udp://@224.1.1.240:6000 it hangs forever with no result. Then I run tcpdump and it shows no ...
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0answers
45 views

VM LAB - Promiscuous mode clarification

So for clarification I am running a Lab within VMware behind OpenVPN, 1 NIC with direct internet access (WAN vswitch) and another NIC with a leg inside a LAN vswitch. (This obviously houses my VM's ...
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1answer
153 views

Set up Ubuntu server to intercept traffic directed at another IP and send it to Apache? [closed]

I'm trying to reverse-engineer the protocol used by HP ePrint. For some reason the printer responds with an error when I override the DNS to point to my own local server, so I decided to create a ...
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1answer
3k views

brctl bridge forwarding packets to promiscuous interfaces

I have two promiscuous sniffing interfaces on my linux box: eth0 is connected to an external vlan bridge eth1 is connected to an internal vlan bridge with eth0 I can sniff all traffic on my "...
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1answer
1k views

Does Open vSwitch put attached interfaces into promiscuous mode?

When I use Linux bridging to bridge a virtual machine to a physical NIC, I have to explicitly set the NIC to promiscuous mode so that ethernet frames that were destined for the VM would make it to the ...