Setting applications to use specific network interfaces

How do I configure my computer such that specific applications will default to a different network interface than all the rest?
I want to set it up so that Adium always tries to use AirPort first and everything else uses ethernet if it's available.
Powerbook G4 1.5 Ghz Mac OS X (10.4.8) 1GB RAM

You can't (normally) get there from here.
What you're trying to do is affect the routing (route certain traffic through a specific interface). The issue is that routing works at the IP level, not the application level. This means that you can tell the system to route a.b.c.d (e.g. the address of the IM server you're connecting to) through a speciic router at w.x.y.z (e.g. the AirPort).
In order to do this, though, you need to have different IP address/subnet masks on each interface.
For example, assuming your wired ethernet is using 192.168.1.2/255.255.255.0 and your wired ethernet router is at 192.168.1.1, and your AirPort interface is using 10.1.1.2 with the AirPort router at 10.1.1.1 you can run the command:
<pre class=command>sudo route add a.b.c.d 10.1.1.1</pre>
and all traffic for a.b.c.d will go over the AirPort link.
Note that it doesn't matter what protocol you use - any traffic destined for a.b.c.d, whether it's AIM, HTTP, FTP or anything else - or what application you use - Adium, Safari, FireFox, etc. - they'll all use the AirPort link.
Note that this technique will NOT work if you have both interfaces on the machine configured in the same subnet, but this is not a supported configuration, so you shouldn't be doing that anyway.

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Set applications to use specific networks

i am setting up my networking on a mac pro4,1 (intel) and i have attached too two separate ethernet networks, both are working fine. one is my work server (thru switch to t3) and the other is an inhouse dsl. i want to route traffic from specific applications to specific networks: (i.e. 'firefox' to inhouse and 'entourage' to work server). i have set up the networking with different 'location' configurations so i can change which i use but i want it to work on the fly. how is this done?

You can't (normally) get there from here.
What you're trying to do is affect the routing (route certain traffic through a specific interface). The issue is that routing works at the IP level, not the application level. This means that you can tell the system to route a.b.c.d (e.g. the address of the IM server you're connecting to) through a speciic router at w.x.y.z (e.g. the AirPort).
In order to do this, though, you need to have different IP address/subnet masks on each interface.
For example, assuming your wired ethernet is using 192.168.1.2/255.255.255.0 and your wired ethernet router is at 192.168.1.1, and your AirPort interface is using 10.1.1.2 with the AirPort router at 10.1.1.1 you can run the command:
<pre class=command>sudo route add a.b.c.d 10.1.1.1</pre>
and all traffic for a.b.c.d will go over the AirPort link.
Note that it doesn't matter what protocol you use - any traffic destined for a.b.c.d, whether it's AIM, HTTP, FTP or anything else - or what application you use - Adium, Safari, FireFox, etc. - they'll all use the AirPort link.
Note that this technique will NOT work if you have both interfaces on the machine configured in the same subnet, but this is not a supported configuration, so you shouldn't be doing that anyway.

Force application to use one network interface

I want one application's traffic to go though one interface (ppp0), but everything else using the regular eth0.
The app connects to many IPs, and recieves connections from many others, so I cannot route by IP.
At the moment I use ppp0 as the default route and everything goes through there.
Is there no way to force the app into using ppp0, then I could set the default back to eth0. Does there exist a wrapper, etc. to do this? It seems like a simple scenario which is easily doable from a theory POV.
Thanks

You may be able to tweak this script I wrote to do what you're after:
http://github.com/fukawi2/pb-route

Using a specific network interface

Hello, I would like to know how I can force Mac OS X to use a specific network interface while connecting to my mac mini (from the iMac):
I'm connected to the internet (I mean the local network) using the airport, and I connected my iMac with the mac mini using an ethernet cable (because I want to transfer files faster, and I don't want to reboot my mini in target disk mode), but when I connect to the mini (using the "share" feature) it seems to use the airport connection. Of course I could disable the airport interface to force it to use the ethernet one (and it works) but I don't want to...
So, how can I force a specific interface? I don't mind using a command line command to mount it initially btw.
Thanks

Hello,
Try using a different IP address range to put each interface in a different subnet. For example use 10.0.0.x and 255.255.255.0 for the Ethernet connection and 192.18.2.x and 255.255.255.0 for the Airport.
mrtotes

One or more application are using Itunes scripting interface

After downloading update on ITunes 10 on windows 7 it freezes. Or something pops up and says one or more application are using itunes scripting interface quit.
I tried everything. Help.

well, you're the first one I''m seen reporting this, so that makes me think it is unique to your PC. So I doubt an updated iTunes version is going to "fix" this.
The way to find things like this is by using MSCONFIG as explained in these directions. But it is tedious to find it, requires a lot of PC restarting. You said it's not a big deal, so you might not want to spend the time.
http://docs.info.apple.com/article.html?artnum=302538

Howto bind multicast listener to a specific network interface (NIC)?

All of our cluster machines have 2 network interfaces. One of the requirements is that all cluster-related traffic has to use a specific interface, leaving the other open for all non-clustering network traffic.
Thus, I've to bind the Coherence multicast listener to a specific interface.
Unfortunately I did not find a setting for this in the Coherence configuration XML file.
Is it possible to bind the multicast listener to a specific NIC, if yes, how can it be done?
Thanks a lot!
Best regards,
Wolf

Hi Wolf,
it can be specified as part of the unicast-listener configuration within the operational configuration:
http://coherence.oracle.com/display/COH34UG/unicast-listener
You need to specify the address and the port elements.
Alternatively, you can specify values for this as a Java property:
-Dtangosol.coherence.localhost=nicaddress -Dtangosol.coherence.localport=unicastportwhere nicaddress is the ip address of the network card going to the network you would like to direct Coherence traffic to. Unicast port is the udp port on which Coherence will listen. By default it is 8088 (or automatically incremente in case the port is already bound).
If your kernel is configured to use both ipv6 and ipv4 and you specified the ipv4 address of the network card then you might also need to specify:
-Djava.net.preferIPv4Stack=trueThe multicast listener and publisher will send and receive on the interface used by the unicast listener.
Best regards,
Robert

"one or more application is using itunes scripting interface"

Everytime I exit itunes, a windows pops up saying that message. How do I get rid of it? I don't know any programs that maybe using itunes scripting interface. Please help.

well, you're the first one I''m seen reporting this, so that makes me think it is unique to your PC. So I doubt an updated iTunes version is going to "fix" this.
The way to find things like this is by using MSCONFIG as explained in these directions. But it is tedious to find it, requires a lot of PC restarting. You said it's not a big deal, so you might not want to spend the time.
http://docs.info.apple.com/article.html?artnum=302538

Assigning certain applications to specific network interfaces

I connect to a wired and wireless network. Each have different uses.
I'd like to assign the web browsing and some other tasks to the wireless and the filesharing and NAS to the wired network.
Is there a way to assign this? or is it one or the other?

Just so we understand your setup:
You have two networks that you're connecting to, at
the same time?
Two routers/BaseStations?
Your airport card gets an IP like 10.0.1.x
Your ethernet gets an IP like...192.168.0.x
Something like that.

How to tell Transmission to use a specific network interface?

I don't see any option for it in the Preferences. Does anybody know?
Thank you.

Take a look in .config/transmission-daemon/settings.json. There are bind-address options to play with.

What setting do I use to Network Mac 10.4.6 to PC Windows XP with Router

I am trying to hook up a Mac G4
with OS 10.4.6 and a PC with Windows XP through a Linksys Network
Everywhere DSL Router. The router would see the PC but not the Mac. Could
not connect to the internet with the PC through the router. Both
computers connect to the internet when they are individually hooked
to the DSL modem. On the Mac in System Preferences>Sharing>Services, Firewall and Inernet, should any boxes be checked? Is this the problem. I have the IP and DNS numbers for both computers.
Thanks for any help.
Sherry (who is new at this)

If this is not a wireless network, this may all be rubbish!
To which computer is the Linksys ADSL cable attached? If it is the PC, than the"Internet sharing" is done on the PC, so the Apple needs to log on to an existing connection. The Linksys will probably need to be told the Mac address of the Apple so that it gives the Apple permission to log on (Airport address - same thing). The Apple will need to have the Password to log on to the network- you should have set up a WEP password when setting up the router. They also need to be on the same Network i.e. both on WORKGROUP, or whatever. You need to set your FIREWALL to allow Internet, file and printer sharing. (The XP built in firewall doesn't seem have this option).
You should see your Apple on the network, you log on to it by double clicking the icon, typing your Mac "Short name" into the "User name" slot, and your Apple's password into.... wait for it..... the PASSWORD slot
On the Apple, from Finder>go>network this should bring up a panel with a folder with your network name on it, clicking on this folder should bring up the name of your computer, clicking on this should then invite you to open folders on your PC (Assuming you've set up a shared folder(s)).
If your printer is plugged into your PC..... Have fun!
Hope this helped - I'm sure that this is the sequence I used to, eventually, get mine talking. But different routers (Mine's Netgear) and different Firewalls may have different rules, but the principle will be pretty similar.

Network Interface selection

Hello,
I'd like to use specific network interfaces for different applications. For example using always wi-fi for skype, only one browser on a specified VPN and so on...
I thought to do it using ipfw, but it seems it is not possible to set rules on the base of process ID.
Is there any tool allowing to do such a thing? Any other suggestion would be well accepted!
Thanks in advance

I am not aware of any tool that can accomplish exactly what you ask. The command line tool "route" can setup protocol-based routes. You could have skype go to one interface and http go through another. But I don't know of any way to make it application-specific.

Set speed limit to network interface

Hi
I want build a program to set limit speed to my network interface
for example max download speed for wlan connection 10Kb
how must edit network interface for this work
i searched but can't found anything
thanks

Why would you want to do this?
It sounds quite suspicious to me.
Still lost in code, just at a little higher level.
i want save my monthly traffic
That doesn't make much sense. How will limiting the network speed do that?
If you limit the network speed to 20% of what it was then it will just take 5 times longer (more really due to the amount of overhead in data packets) in order to upload or download anything.
If you are on a plan which limits the amount of data via the plans network which can be uploaded and or downloaded during the plans payment time period then perhaps you should monitor the data transceived over the link during that time period.
Then write an app that turns off a NIC and will monitor the NIC so if it is enabled it is turned off again whenever some daily allowance of bandwidth is exceeded. Or perhaps write a service for that. Of course the app or service would need to know the pay
period to monitor, the amount of bandwidth provided for the pay period, constantly store bandwidth used (either sent, received or both) while the NIC is up and be designed to know for each day when to disable the NIC if necessary. And allow the NIC to be re-enabled
or re-enable the NIC when some time occurs following the previous disable of a NIC.
However you don't provide what the requirement would be other than you just want to limit bandwidth via some NIC. Which really means nothing unless multiple PC's are vying for bandwidth and you want on specific PC to be allocated more bandwidth than
any other PC or something.
Group Policy Editor has a setting that can apparently
limit reserveable bandwidth. I don't know if setting that to %95 would only provide applications %5 of the available bandwidth. I've installed GPE on my Win 7 Home Premium PC which it does not come
with and I had to find an installer from an untrusted source in order to do that.
Recently I had a friend using a Verizon WIFI device which provides local WIFI for PC's via Verizons cell service I suppose. Apparently if the PC was left on and nobody was using it then bandwidth was used. I believe in about one 6 hour time period over %15
of the entire pay periods bandwidth allowance was used when his girlfriend let the PC on unattended. So I could see where some type of monitor app would be nice for a situation like that.
When you use few words to describe anything the result is everybody having to guess. And with regard to what you think you want to do it makes the entire thread a guess.
La vida loca

Many of the times my Iphone 3G 16GB shows "No Service" in the specific network area, but if the same sim card is used with other mobile handset in the same network area its shows full network, Is this a Iphone 3G Handset problem or is network

Many of the times my Iphone 3G 16GB shows "No Service" in the specific network area, but if the same sim card is used with other mobile handset in the same network area its shows full network, Is this a Iphone 3G Handset problem or is it a problem with network service provider for iphone in india with Airtel.

Try to reset Network setting thru (Setting/General/Reset/Reset Network Setting - after clicking on it the phone will ask to reboot)
According to my R&D I have experienced that one must reset the network each time when we r at home or in office or other places, the phone after resetting the network setting acquires the area specific network setting n works well, try it & if any other solution do let me known
Calling up customer care did not help me, they do keep us in a loop with the same old answeres that “Our technical team is working on it & WILL GET BACK TO u” leaving us with no solution at the end
Try what I suggest think to will help u

How to use Integrated 10/100 Base-T networking interface

I am new to Solaris, in fact I just installed it. I assumed that I would be able to connect to the internet immediately, but that isn't the case. I have an HP a1610n media center pc, and it comes with an Integrated 10/100 Base-T networking interface. Do I need to install a driver to use this network interface?

Can Solaris 'see' your device? this tool wil let you know. [Sun Device Detection Tool 2.1 |http://www.sun.com/bigadmin/hcl/hcts/device_detect.jsp]
If it doesn't see the controller, there are links on the device detection tool page that should help you find a driver - if one's available - for your NIC.
john

Dual network interface when joining multicast group

Hello,
I've have a machine with two networks interfaces, eth0 and eth1. The route table is configured to send all the multicast traffic through eth1.
This is
route add -net 224.0.0.0 netmask 240.0.0.0 dev eth1
I have the following code that joins to a multicast address to listen incoming messages in my Java application
InetAddress group = InetAddress.getByName(multiCastAddress);
socket = new MulticastSocket(Integer.parseInt(multiCastPort));
socket.joinGroup(group);
The result is that the application can not see the multicast traffic since the joinGroup operation is always done on eth0, guess because JVM selects the first one available.
If I change the route entry to use eth0 for all the multicast traffic, the same code works perfectly, and from my Java application I can see the multicast traffic.
This is
route add -net 224.0.0.0 netmask 240.0.0.0 dev eth0
Is there any way to force to join a specific network interface?
Thanks

The answer is staring you in the face in the Javadoc:
http://java.sun.com/j2se/1.5.0/docs/api/java/net/MulticastSocket.html#joinGroup(java.net.SocketAddress,%20java.net.NetworkInterface)
That bug report only concerns setNetworkInterface(), which the OP isn't using, on Linux and IPv6, and it's dated 2002.

Setting applications to use specific network interfaces

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