Bonjour not working in Wifi/Ethernet

[el.pescado]

Hi,

I have a MacBook Pro with Mountain Lion installed, a Linux PC that serves as file server (using Netatalk), and a D-Link DIR-300 router. When all devices are connected via Ethernet, everything works fine.

Hoverver, when i connect MacBook using WiFi, is cannot detect any services hosted by Linux box. I can connect by manually entering IP address in "Connect to server" window, though.

The moment I plug ethernet cable, remote shares instantly show in Finder.

However connected, both devices are in same network, ping each other etc.

Can anyone help?

[jared_kipe]

Originally Posted by el.pescado

Hi,

I have a MacBook Pro with Mountain Lion installed, a Linux PC that serves as file server (using Netatalk), and a D-Link DIR-300 router. When all devices are connected via Ethernet, everything works fine.

Hoverver, when i connect MacBook using WiFi, is cannot detect any services hosted by Linux box. I can connect by manually entering IP address in "Connect to server" window, though.

The moment I plug ethernet cable, remote shares instantly show in Finder.

However connected, both devices are in same network, ping each other etc.

Can anyone help?

mDNS stuff needs to be delivered at a minimum rate, for 2.4GHz network it is 12Mbps (so Cicso says). Ensure your connection is at least this fast. Also ensure that when on wifi you're not on a different network segment or netmask.

[Sayer]

Bonjour only works between all machines on the same subnet.

WiFi can be on a different IP subnet range from a wired connection, leaving your WiFi Mac in a different subnet and thus unable to "see" the subnet where Bonjour is.

Maybe Ethernet is: 192.168.1.xxx

Maybe WiFi is:     192.168.2.xxx

Different subnet means no Bonjour across both WiFi and Ethernet.

[jmcgeejr]

Originally Posted by Sayer

Bonjour only works between all machines on the same subnet.

WiFi can be on a different IP subnet range from a wired connection, leaving your WiFi Mac in a different subnet and thus unable to "see" the subnet where Bonjour is.

Maybe Ethernet is: 192.168.1.xxx

Maybe WiFi is:     192.168.2.xxx

Different subnet means no Bonjour across both WiFi and Ethernet.

it may not even be that, some routers now are blocking wifi from talking to ethernet for security sake, it's a setting called something like wifi segmentation or something like that

[jared_kipe]

Originally Posted by jmcgeejr

it may not even be that, some routers now are blocking wifi from talking to ethernet for security sake, it's a setting called something like wifi segmentation or something like that

OP did say he could communicate directly through IP address, so it would have to be something more like blocking port 5353.

[jmcgeejr]

Originally Posted by jared_kipe

OP did say he could communicate directly through IP address, so it would have to be something more like blocking port 5353.

not necessarily, bonjour is a broadcast protocol, direct IP is not, some firewalls block broadcasting btw wifi and lan.

[jared_kipe]

Originally Posted by jmcgeejr

not necessarily, bonjour is a broadcast protocol, direct IP is not, some firewalls block broadcasting btw wifi and lan.

Ok plausible then. Any particular router/brand that is doing this?

[assembled]

you probably have multicast on WiFi disabled

[el.pescado]

Originally Posted by Sayer

Bonjour only works between all machines on the same subnet.

WiFi can be on a different IP subnet range from a wired connection, leaving your WiFi Mac in a different subnet and thus unable to "see" the subnet where Bonjour is.

Maybe Ethernet is: 192.168.1.xxx

Maybe WiFi is:     192.168.2.xxx

Different subnet means no Bonjour across both WiFi and Ethernet.

Both WiFi and Ethernet are on the same subnet:

en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
	options=2b<RXCSUM,TXCSUM,VLAN_HWTAGGING,TSO4>
	ether xx:xx:xx:xx:xx:xx 
	inet 192.168.0.130 netmask 0xffffff00 broadcast 192.168.0.255
	media: autoselect (100baseTX <full-duplex,flow-control>)
	status: active
en1: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
	ether xx:xx:xx:xx:xx:xx 
	inet 192.168.0.102 netmask 0xffffff00 broadcast 192.168.0.255
	media: autoselect
	status: active

[assembled]

and as I said, your "router" is probably blocking multicast to/from WiFi

with no multicast, there is no mDNS, the m in mDNS being multicast...

with no mDNS there is no Bonjour...

[el.pescado]

I have checked my router (DLink DIR-300) configuration, and in "Advanced Network" screen there is "Multicast Streams" section, with two options checked: "Enable Multicast Streams" and "Wireless enhance mode". Strange.

EDIT:

[assembled]

you might want to try using Wireshark to see if you can see the mDNS packets

[tjmarques]

Hi,

I'm sorry for bumping this old(ish) thread, but I'm having the exact same problem with my MacBook Pro running Mountain Lion, only with the wired connection, not the wireless: when connected through WiFi all network devices show immediately in Finder, when connected through Ethernet cable, nothing is shown.
All devices are on the same subnetwork (192.168.1.x) and I've ruled out router configuration as the problem as a PPC Mac Mini running Leopard connected to the exact same Ethernet port in the router works as expected.

Were you able to solve your problem?
Any other suggestions?
Ethernet device configuration?

Thank you for any help you can provide