Routerboard 450 How to configure for T1 connection?

RouterOS Beginner Basics
1

I’m really not that great when it comes to this kind of hardware, however, I really need to get internet to work!

Provider information:

Public block: 72.242.20.144
Adtran gateway: 72.242.20.145
IP I need: 72.242.20.146
Netmask: 255.255.255.248

Here’s my topology:

T1 connection from provider, which goes to Adtran Total Access 600R device, this device is just a pass-through.
Next up is the Mikrotik Routerboard 450, which has v3 of the software installed on it.
From the Routerboard 450 it goes to my switch, my server (MS Server 2008) is a domain controller, dns server, and also a dhcp server, so I know I don’t need these functions from the Routerboard.

I have two interfaces enabled:

Interface 1 (port1): Incoming Line from T1
Interface 2 (port2): Outgoing Line to Switch

I’ve assigned IP addresses to both those interfaces such as:

Interace 1:

Address: 72.242.20.146 Netmask: 255.255.255.248 Network: 72.242.20.144 Broadcast: 72.242.20.151

Interface 2:

Address: 192.168.1.3 Netmask: 255.255.255.0 Network: 192.168.1.0 Broadcast: 192.168.1.255

Now what do I do after that?

2

You need a quad zero default route pointing to your adtran gateway

/ip route add gateway=72.242.20.145

Then you need to set up source NAT for the private IP space

http://wiki.mikrotik.com/wiki/Firewall_nat#Basic_examples

You might want to set up a DHCP server

http://wiki.mikrotik.com/wiki/DHCP_Server#Basic_examples

Good luck,

Tom

3

Would the 10.5.8.200/32 be my 72.xx.xxx.xxx/29 address instead, according to the first link about NAT?

I setup the src-nat and dst-nat according to the guide, and added the gatway command, however still not net.

I know I’m doing something wrong here, is it the DHCP, how do I use my servers DHCP?

Thanks