MDNS across two interfaces WITHOUT Avahi - help !
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Hi.
Since i originally suggested using the igmp proxy to route the multicast traffic needed for mDNS i should chime in.This was only a suggesting which i think should work.
I don't have any apple devices and don't really use mDNS myself.From your posted screenshot it looks as if the devices in question are trying to communicate via IPv6 for their mDNS communication.
However they probably fall back at some time to IPv4 (or querry v4 and v6 together right from the beginning), and you just don't see this kind of traffic in the log because it's allowed.I'm not really sure how to debug/verify this.
I did just now some short tests but couldn't get anything to traverse the pfSense.
Not sure if i missunderstood something the way the igmp proxy works, or i just can't generate the mDNS lookups the right way. (i'm trying with "dig +short -x 10.0.0.200 @224.0.0.251 -p 5353" and with "getent hosts 10.0.0.200") -
One of the guys I was sorta kinda working with a little earlier does use what seems to be pretty much any apple device he can find and is running 2.1 + avahi and its working. The problems so far seem to be with avahi running on smallish alix type systems that upgraded with avahi already in place and had issues. I've not seem an instance of someone just clean installing 2.1 on alix with avahi yet. Not sure what that might do.
Either way I'm waiting to see how igmp proxy might work out.
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I had IPv6 running on pfSense with a pass-all rule set up just like the default "LAN -> any" rule. I also checked off the advanced options checkbox like I posted in the IPv4 screen shot too.
pfSense still wants to block the port 5353 IPv6 traffic and it doesn't want to route the IPv6 traffic. I don't know squat about IPv6, but I put the IPv6 address of the firewall into the IGMP settings and it still didn't work.
There's a good chance it's how I am setting up my IPv4 settings in IGMP. Can anyone give me guidance on that (based on my screen shots included in this thread)? It should fail back to IPv4 and work, I'm not sure my proxy settings are correct.
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Well - If you don't need IPV6 block it, then just ignore the noise in your logs about it getting blocked.
Thats assuming you are on IPV4 and like it that way.
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Well - If you don't need IPV6 block it, then just ignore the noise in your logs about it getting blocked.
Thats assuming you are on IPV4 and like it that way.
This comment reflects my requirements. I have no need for IPv6 at this point and just need to find a way to allow IPv4 packets across network boundaries on pfSense.
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Yep - Got it.
I don't know if you can use IGMP proxy to accomplish this. I do know that avahi does work well. I just am not sure why its being bad after an update to 2.1 on Alix, because it does seem to be an Alix issue.
I keep wondering if avahi will work from a clean install of 2.1 but seems no one is willing to image their system from fresh to try it.
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Yep - Got it.
I don't know if you can use IGMP proxy to accomplish this. I do know that avahi does work well. I just am not sure why its being bad after an update to 2.1 on Alix, because it does seem to be an Alix issue.
I keep wondering if avahi will work from a clean install of 2.1 but seems no one is willing to image their system from fresh to try it.
I can take a backup of mine and try it.
The other major issue that I have is swapping between wired Ethernet and wifi on the same subnet:
I have a suspicion that this is an Avahi problem and one of the reasons I don't want it on my Alix / pfSesne box any longer however this was to be the topic of another thread I have never had time to start !
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I think your MAC air is just seeing its name is already in a DHCP reservation with a different MAC and is doing that.
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I think you MAC air is just seeing its name is already in a DHCP reservation with a different MAC and is doing that.
OK - so possibly a DCHO configuration / MacbookAir issue. I would imagine that when the macbook leaves a wifi network the DHCP reservation is not released. But the strange this is that the wifi adapter and wired ethernet adapter have different MAC address as would be obviously expected.
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I have a suspicion that this is an Avahi problem and one of the reasons I don't want it on my Alix / pfSesne box any longer however this was to be the topic of another thread I have never had time to start !
This is definitely Avahi. I can confirm that. All of my machines have been renaming themselves for a while, and it's not limited to WiFi. Some of my cabled machines (including my server) have done that.
Avahi needs to be updated as it's still listed (I think) as an alpha project. It's mostly stable, but could/should be more scalable and friendly.
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Yep - Different MACs but asking for the same name on the network.
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Yep - Different MACs but asking for the same name on the network.
Cool - yeah I think thats thee conclusion I came to last time I looked at this ! It was a naming issues which lent itself to being an Avahi 'thing'Maybe not… :(
This is what I see in the DHCP reservation table now and Avahi isn't running:
10.0.101.101 a8:88:08:69:c5:5c BW-iPhone-361 2013/09/17 22:50:33 2013/09/18 22:50:33 online active
My iphone has been renamed 361 times ! Why does this not happen on any other F/W device I have ever had at home ? I have been running Asus RTN66U with no such shenanigans !
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I do not know. Perhaps it is an avahi issue then?
Try this with your apple device and see if it gets fixed.
Give it a 1 single name using a static DHCP assignment on wired based on MAC.
Then give it a slightly different name in DHCP on the interface wireless is on based on MAC.(You know how to go into DHCP leases and do that right?)
(You may be able to give the same name on both interfaces for the 2 MACs, but I wouldn't think so. Never tried)
One would think this would put an end to all the renaming.
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It's an Avahi issue.
Your device will attach itself to your network and Avahi then announces the mDNS name to the local subnet and then routes it to the next subnet. I believe it also cache's the name in its own database.
The next time you attach the same devices to the network, the announcement goes out and Avahi thinks there's a duplicate. The Mac responds to the duplication message by renaming itself. All of my machines do this to a certain extent and then by the second or third iteration it stops.
Removing Avahi and renaming your devices solves the issue.
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Well - yeah… But wouldn't a static map and name also do it? (just guessing here)
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Unfortunately, it doesn't.
I have a static IP for my Mac server (10.0.1.240). On occasion when I reboot the machine and Avahi is running, it renames the box's mDNS name because it thinks there's a conflict.
I also have another machine with two NICs and two static IPs. It's on both my 10.0.1.0/24 and 10.0.2.0/24 networks. The same thing will happen to that machine because it's on both networks with the same mDNS name.
I don't know exactly how Avahi works, but it seems to be caching the names and may not be associating them with a MAC address or some other voodoo.
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BUT YOU NEED IT! What will you do without iStuff? ;D
OK - Lets hope you guys can make IGMP proxy work for you then.
(Did I use up all the possible wrong answers yet?)
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I think we're going to see the proliferation of more mDNS traffic over time, especially in SOHO and home networks. Nearly all of Apple's devices communicate over mDNS to make networking and resource sharing easier by declaring the device and its available services on the network. Google TV and other streaming TV implementations rely on mDNS, and I'll assume that Google will be using mDNS as a standard in all of their mobile devices for the same reason Apple did–to make device and service availability simple for folks.
So I can see mDNS support becoming more of a requirement than a nice to have in the future. So breathing life back into the Avahi project or something similar to it would be a good thing. Either that or someone smarter than me could tell me how to correctly set up IGMP for two LANs and make mDNS route properly.
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Well - I'm either not smarter than you or I'm just hoarding my arcane wisdom. You decide :P
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Well - I'm either not smarter than you or I'm just hoarding my arcane wisdom. You decide :P
:|
