Kern Sibbald wrote:
> On Thursday 05 October 2006 15:03, James Ray wrote:
>
>> Kern Sibbald wrote:
>>
>>> On Thursday 05 October 2006 11:02, James Ray wrote:
>>>
>>>> All,
>>>> I am wanting the communications from bacula to come out of the same IP
>>>> address I have DirAddress set as in the Director {} resource. This is
>>>> not the default system address.
>>>>
>>>> I have just tried to do this with IPTables and source NATing but due to
>>>> a bug in the Fedora Kernel (or what seems to be) I get a panic ;(
>>>>
>>>> Any ideas other than me writing a quick patch to do it?
>>>>
>>> Could you explain in detail why you would want to do this?
>>>
>>> Could you explain what components you are talking about when you say you
>>>
> are
>
>>> wanting "communications from bacula"? (Director, Console, File daemon,
>>> Storage daemon), and to where? (each of the daemons carry on several
>>> different kinds of network conversations -- Dir=3, Console=1, FD=2, SD=2).
>>> See the daemon interconnection picture in the beginning of the manual for
>>>
> the
>
>>> details of who talks to whom.
>>>
>>> Also, could you explain how it is possible to use a different address than
>>>
> the
>
>>> one which is "assigned" to your computer?
>>>
>>>
>> We have a concept of a system address (the machine itself) and a service
>> address (one for each service, say .2 == an apache service, .3 == an
>> bacula service, .4 == a dns service, where as .1 is a _system_ address)
>> all the interfaces will be on the same machine.
>>
>> So any communications coming _from_ the bacula service need to come out
>> of .3 and any connections to the bacula service need to head onto .3 also.
>>
>> What I have seen (only on my breif testing) is that the listen address
>> is the .3 address (as I set in DirAddress) but the outcoming connections
>> from the bacula-dir to the bacula-fd across the network originate for
>> the system default address of .1...
>>
>
> I have no idea how to control which address is used for outgoing
> communications other than by configuring your network gateway to go through
> the preferred device, which may not do exactly what you want.
>
> In any event, unless I am misunderstanding something, Bacula has no mechanism
> for controlling outgoing addresses.
>
>
A listening socket doesn't perform 2-way communications, and so can be
"bound" to multiple interfaces. It is the socket returned from accept()
that is bound to a particular interface, (the interface which received
the connection request). So DIRAddress affects which interfaces DIR
listens for connections on, but has nothing to do with any client
connections that DIR makes to other daemons. It is possible to bind a
client socket to a particular interface and/or port previous to the
connect() call, so in that way bacula COULD control the outgoing
address, but I don't see why it should want to do it's own routing.
James' problem seems to be routing related. James, check the 'src'
parameter available in the 'ip route add' command. (man ip)
>> I shall re-test and post my outcomes.
>>
>> --
>> James Ray. <[EMAIL PROTECTED]>
>> Computing Services
>> Queen Mary, University of London
>>
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