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.

Similar Messages

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

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.

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

How to stop certain applications accessing the network/internet

Hi.
How do you stop certain applictions from accessing the internet/network.
Thanks,
Nathaniel

Hmmm.
I'd say that there's probably a setting in the final cut preferences to enable/disable automatic updates. Not sure about Office.
+("Office, Software Update, Final Cut etc.")+
And then there's the "etc"...don't know what that refers to . sorry.
Is this process using an extraordinary proportion of your allocation of internet? Or is it more like on or two percent.?
Sorry, I am not familiar with FinalCut, nor this mysterious "data card" with the allocated bandwidth.
Are you so severely limited by this 'data card' service that you're on such a meager connection allowance? (sounds like the mileage limits on a car that I leased from nissan a few years ago. I was limited to something crazy like 10,000 miles per year, {adding} that's not a lot of miles here in the states)
Message was edited by: Rick Van Vliet

Force Application to choose network interface

Hi Everyone,
My target computer as two NIC,
Eth1:
IP: 192.168.0.14
Mask: 255.255.255.0
GateWay: 192.168.0.254
Eth2:
IP: 10.2.5.168
Mask: 255.255.0.0
Gateway: Blank
Eth1 is supposed to be connected to the network, Eth2 is only connected to a camera.
I use a Blank String Control connected to the string to IP VI as in the attached pic to retrieve the computer IP address and use it to find the presence of another equipement on Eth1 subnet,
Unfortunatly when the Eth2 cam is connected and configured the blank string control gives back the IP of the Eth2.
According to this page http://www.ni.com/white-paper/12558/en I have set the right configuration, but I still have this problem.
How can I force the soft to use the right NIC
I have also read this topic: http://forums.ni.com/t5/LabVIEW-Idea-Exchange/Allow-user-to-select-the-which-NIC-to-use-for-network/... and I don't understand why it has been rejected
Thanks a lot,
Solved!
Go to Solution.
Attachments:
BlankIP.JPG ‏11 KB

Right click on string-ip and select multiple output. You should then be able to perform a check on the array to pull out the relevant IP address.
edit: Here's a way to show all the IPs as an array of strings. Probably not the most elegant or efficient way to do it though

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.

Remove assignment of application to a space

Under SL I assigned certain applications to specific space. How do change / undo these settings in Lion. System Preferences does not have anything to manage applications to spaces.

Thanks for the info. The only reason I needed to do this is Time Machine has a problem dealing with the finder assigned to one space if you don't launch time machine in the space where the finder is. Any idea how to solve this problem any other way?

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.

Why assign IP addresses to router/switch interfaces?

I get why I would ever want to assign a IP address to a router or switch, for remote login and IP for hosts to reach it. But why assign IP addresses to the interfaces? Is it so the router/switch knows which port to send the packet out? Route summation? But I thought they do that through the routing table, like " that address is out this port".
So why would we ever need to assign IP addresses to specific port interfaces?

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Posting
You normally assign IP addresses to L3 interfaces so other L3 devices have an IP address to forward traffic to. (L2 IP address are generally only used for management.)
Suppose you had Host (192.168.1.5/24) <> R1 <> R2 <> (192.168.2.8/24) Host, and you want the two hosts to intercommunicate. How would you get this to work?
You might started by providing interface IPs on the router interfaces facing the host, such as:
Host (192.168.1.5/24) <> (192.168.1.1/24) R1 <> R2 (192.168.2.1/24) <> (192.168.2.8/24) Host
You then configure "gateway" IPs on both hosts:
Host (192.168.1.5/24 - GW 192.168.1.1) <> (192.168.1.1/24) R1 <> R2 (192.168.2.1/24) <> (192.168.2.8/24 - GW 192.168.2.1) Host
Now each hosts "knows" to send all its off local subnet, traffic physically to the GW IP. So, for example, if 192.168.1.5 want to sent to 192.168.2.8, it would forward the traffic to the GW IP, 192.168.1.1. This is a example of why you want an IP on the router's L3 interface.
Next we want R1 to forward the packet to R2, but it too needs a "next hop" IP address, so we assign addresses on the link between the two router, e.g.:
Host (192.168.1.5/24 - GW 192.168.1.1) <> (192.168.1.1/24) R1 (192.168.3.1/24) <> (192.168.3.2/24) R2 (192.168.2.1/24) <> (192.168.2.8/24 - GW 192.168.2.1) Host
R1 then needs to "know" where to send packets with an destination IP network of 192.168.2.0/24, in this case, it need to "know" to send the to IP 192.168.3.2. When it does, R2, having and interface with 192.168.2.1, will also know 192.168.2.8 can be reached by sending the packet out that interface.
Hopefully, the above will show why IP addresses on router L3 interfaces are needed.
BTW, normally for the R1<>R2 link, you would assign a /30 or /31 network or you might use "unnumbered" interfaces (which "borrow" IPs from another interface).

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.

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.

Mount filesystems (NFS & SSHFS) on specific network comming up

Hi,
I'd like to mount some NFS and SSHFS shares when a specific network/interface has a connection. How can I do this?
Thanks for your help in advance.

The problem was how the exports were configured from the Synology box. I tried to specify access for my whole subnet using 192.168.1.* as the host specification. A more thorough reading of the /etc/exports man page statement on wildcards notes the following: "Wildcards should not be used with IP addresses; however, it is possible for them to work accidentally if reverse DNS lookups fail." In my case, my servers had DNS (and therefore presumable revers DNS) entries, and therefore mounts failed. My clients (largely laptops) get a DHCP address from my router, and don't have DNS entries in my domain. Therefore, the mounts "worked accidentally" from my clients, and not from my servers.
I'm now adding "works accidentally" to my lexicon of strange & wonderous software development feature terms, along with "bug-like feature". Now that I've calmed down enough from the lost week of spare time, I should be able to submit an RFE to Synology without using any profanity. Had I entered the offending wildcards by hand-editing the exports, I'd hold myself entirely responsible. Since I did this with the Synology UI, it seems reasonable to expect that I'd at least see a warning that my host spec was potentially not going to achieve the intended results.

Assigning material numbers to specific customers?

Hello,
I would like to assign certain customers with specific material numbers that they are allowed to order. Is there a way in SAP to input a list of materials for a customer so that it only lets them buy the items from that list?
Thank you,
- Nick

This is an update to my original question...
I have found the Listing/Exclusion area of SAP (VB01).
I created a listing record by entering a customer #, and a few material numbers and saved it; however, when I went to VA01 to create a sales order, it still let me enter any material number.
Am I missing a step? I was expecting the system to block me from ordering the item that wasn't on the list, but that wasn't the case.

Assigning an application to display on a specific display

Apparently, you are supposed to be able to right click on an application in the dock and get an option to assign it to a specific display. Unfortunately, this option does not show up when I right click and select options. How do I turn this feature on? Thanks in advance.

iCloud does not include a feature like the old MobileMe Gallery.
Photo Stream does work on the AppleTV, but will only show the last 1000 photos taken and synced to iCloud. You can't create user-defined galleries.
Until June 30th 2012 (when MobileMe closes down), you can still access your MobileMe Galleries, by logging in using your [email protected] MobileMe AppleID and password. That still works for now.
Unfortunately, I don't think there is a long-term solution for your particular usage.

Assigning certain applications to specific network interfaces

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