There is reason why I suggested you go the short way. 

The long way, is the technical attribute that can offer you a fix, but I cringe 
t think of how it may affect your network. 

:) 

Faisal Imtiaz 
Snappy Internet & Telecom 
7266 SW 48 Street 
Miami, FL 33155 
Tel: 305 663 5518 x 232 

Help-desk: (305)663-5518 Option 2 or Email: [email protected] 

> From: "That One Guy /sarcasm" <[email protected]>
> To: [email protected]
> Sent: Tuesday, August 9, 2016 1:22:03 PM
> Subject: Re: [AFMUG] mikrotik present as loopback address

> can you detail the long way
> in this instance, I just want it to be if it is traffic generated by the 
> router
> destined for tcp port 25 present as 1.2.3.4 but dont impact anything else, 
> what
> I dont want to risk is OSPF breaking or dropping an EOIP tunnel because that
> traffic is presenting differently

> On Tue, Aug 9, 2016 at 12:14 PM, Faisal Imtiaz < [email protected] >
> wrote:

>> There is a long way to solve this problem and there is a short way to solve 
>> this
>> problem.

>> short way first:-

>> Mikrotik supports user authentication on out bound mail, so all you need to 
>> do
>> is create a valid email user account on our mail server and use those
>> credentials in your MT router Email settings so that you don't need an 'open
>> mail relay'.

>> Long way:-

>> There is a setting call set-pref-src= in the routing filters, which 
>> accomplishes
>> what you are asking for, however you will have to figure out on how exactly 
>> to
>> tailor it to work for your environment. (I had to find this setting for one 
>> of
>> our Peering Routers, a bit of a long story).

>> :)

>> Faisal Imtiaz
>> Snappy Internet & Telecom
>> 7266 SW 48 Street
>> Miami, FL 33155
>> Tel: 305 663 5518 x 232

>> Help-desk: (305)663-5518 Option 2 or Email: [email protected]

>>> From: "That One Guy /sarcasm" < [email protected] >
>>> To: [email protected]
>>> Sent: Tuesday, August 9, 2016 12:51:03 PM
>>> Subject: [AFMUG] mikrotik present as loopback address

>>> right or wrong, i want to set up an open mail relay on our network for 
>>> mikrotik
>>> backups. I want to lock the relay down to only accept traffic from our 
>>> internal
>>> subnet for loopback IPs on the site routers. How do I make specific traffic
>>> always present as the same IP no matter which interface it exits since i 
>>> cant
>>> seem to find a way to masquerade the output chain
>>> if it is doable, is there also a way to add a line to our default configs 
>>> that
>>> will set the presentation IP to whatever the loopback IP on that device is?

>>> --
>>> If you only see yourself as part of the team but you don't see your team as 
>>> part
>>> of yourself you have already failed as part of the team.

> --
> If you only see yourself as part of the team but you don't see your team as 
> part
> of yourself you have already failed as part of the team.

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