sending to same dest via different interfaces

[Elazar Leibovich]

You can add capability of raw socket to the executable, hence run as
non-root.

Since what you're asking means potentially send illegal (unrouteable) IP
packets, I guess that indeed the kernel will require special privileges to
enable you to do that.

As I said, you can mitigate that with capabilities, or use the old method
of start as root, bind socket and drop privileges, or use a small server
creating such sockets running as root.


On Tue, Mar 4, 2014 at 11:16 AM, Erez D <erez0001 at gmail.com> wrote:

>
>
>
> On Tue, Mar 4, 2014 at 11:05 AM, Elazar Leibovich <elazarl at gmail.com>wrote:
>
>> use the SO_BINDTODEVICE setsockopt.
>>
> requires me to be root ...
>
>>
>>
>> On Tue, Mar 4, 2014 at 10:02 AM, Erez D <erez0001 at gmail.com> wrote:
>>
>>> Hello
>>>
>>>
>>> I have 2 external interfaces via two eth cards, both connected to the
>>> internet
>>>
>>> I want to send a udp packet to same host:port, but choose dynamically
>>> which interface to use.
>>>
>>> can this be done with linux, and how ?
>>>
>>>
>>>
>>> 10x
>>> erez.
>>>
>>> _______________________________________________
>>> Linux-il mailing list
>>> Linux-il at cs.huji.ac.il
>>> http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
>>>
>>>
>>
>
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