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Interface Ethernet Bridging to create a switch

Hey All,

Im not to sure if this has been discussed at all .

I was told in order to make a switch on the SG UTM was to create an Ethernet Bridge group with the interface that weren't being used.

I did so but it seems that somehow after making the group, No data was going through the interfaces that were including into the bridge interface.

If i connected to the main bridge interface and everything else into a switch it would work.

But for example. Eth0 - Main LAN interface. I added eth1,2 to this. If I connected anything into 1 or 2 no data was going through the firewall, SIP was a major issue as well.

Any help of info would be much appreciated :)

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0 sachingurung over 8 years ago

Hi Ryan,

What do you see in the tcpdump captures? Do you see any traffic forwarded through the bridge?

Thanks

Sachin Gurung
Team Lead | Sophos Technical Support
Knowledge Base | @SophosSupport | Video tutorials
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0 RyanHosiassohn over 8 years ago in reply to sachingurung

I actually didn't do a tcp dump on the other interfaces just the main "br0" and looked fine but not the children interfaces ""
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0 sachingurung over 8 years ago in reply to RyanHosiassohn

What does the tcpdump between two host IP addresses on different interface(bridged) reflect?

I will recreate this with my test UTM, provide me sometime to get you an update.

Thanks

Sachin Gurung
Team Lead | Sophos Technical Support
Knowledge Base | @SophosSupport | Video tutorials
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0 apijnappels over 8 years ago

I think you will also need to create a firewall rule allowing traffic from the bridge to the bridge. Sounds strange, but all traffic passing through the UTM's interfaces needs to be allowed in order to be passed through......

Managing several Sophos firewalls both at work and at some home locations, dedicated to continuously improve IT-security and feeling well helping others with their IT-security challenges.
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0 RyanHosiassohn over 8 years ago in reply to apijnappels

Hmmm, That seems very strange :P. But I shall give it ago and see :)
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