I’ve searched the forums but didn’t find what I was looking for, so maybe I can phrase it here.
I have a current business ISP connection which I use to host an email server as well as other services. For certain reasons, I cannot increase the speed of it, so I was looking at cheap consumer fiber. This fiber being consumer has smtp blocked and won’t work for my hosting needs. I was wanting to have two WAN connections. I don’t want this to be load balancing, as I need all traffic aiming at IP A to work, and I’d like IP B to provide a faster download/upload speed for myself.
Does this concept make sense? I’m looking more for what you would call this type of connection/setup so I can learn it rather than being spoonfed the solution.
you need policy based routing, as a primer check this out https://www.youtube.com/watch?v=1oawZUqB_Eo If i were you since you really want to learn look read network primer in other platforms as well because the learning curve is steep in MIkrotik if you don’t have previous solid background in networking
For what you want to do you have to have a good understanding of routing and network address translation for you to work on it, they are mutually inclusive GNS3 is the key NAT is a different animal don’t think MASQUERADE was easy and that’s there to it routing is pretty much involved
If you do have solid linux networking background you can easily migrate to MT
You will need to ensure you have a script to ensure the dynamic gateway IP is updated on any route ( my own cable connection dynamic does this automagically and thus do not need a script but my fiber dynamic connection does need a script).
No mangling required just set the primary wan to a lower distance and all traffic will go there, just use a fib Table name=useWAN2, IP route using the table and a routing rule with source address of your single IP address, action=lookup table=useWAN2 and your done.
Note that if you need to reach any other subnets on your LAN then you will need routing rules first that point to those subnets dst-address table main to ensure this traffic doesnt go out wan2 as well.