Basic Router Setup Problems - Bizzare issue

RouterOS Beginner Basics
1

I recently purchased a R493G, a R2N wireless card, two antennas with the required pigtails, and a POE power injector.

My goal is to get the system set up such that eth2 and eth3 are my two cable modems, the R2N card serves up a wireless access point, and the rest of the ports are used to talk to my big switch and a few devices that are attached directly to the router.
Ideally I’d like for everything but the two cable modems to be able to see and talk to each other, much like on my current slightly retarded linksys modem.

Currently I’ve been able to successfully get the following working:

  • Create an access point, set up security settings to secure it, as per the http://wiki.mikrotik.com/wiki/Manual:Making_a_simple_wireless_AP guide.
  • Use a DHCP Client to pull an address on both eth 2 and eth3 from my two cable modems.
  • Tear my hair out
  • Create a DCHP pool, network, and server on wlan2[the virtual ap] that is able to provide a lease to the laptop
  • Randomly have my DHCP servers turn red texty on me and refuse to work, despite no interface status change, network/pool modification. Truly random as far as I an tell.

Despite carefully following what guides I could on the internet, I can’t for the life of me figure out what in god’s name is causing this issue.

  • I can resolve any addresses to an IP, but I cannot get the ping tool to see the site. I receive a timeout.
  • I can use the ping tool to reach a few addresses, google, yahoo, 4.2.2.2, but almost no others. <—This is the bizarre one.
  • Despite ping not resolving, traceroute is able to get most of the way to the sites that timeout.
  • Plugging the modem into my computer, and punching the IP given by the ping tool instantly loads the site.

Here is a pastebin of my routers ‘export’ command: http://pastebin.com/2ULD7q7Q


Hopefully some of the guys here will be able to help me determine exactly why my router is being picky about what sites it will route, and hopefully someone can link a really through guide on how to set one of these routers up.

2

I’m not sure I understand what the problem is.

The two cable modem - is these for ADSL connection to the internet. Do you have two wan connections?

Looking at the past it seems that your NAT is disabled. you will need a src-nat or masquerade to acces the internet through the router.

rgs pilgrim

3

I would try and get everything working with a single modem first. Once you are comfortable that this is working, I would look at adding the second modem in.


Pilgram is correct as well. Your NAT rules are not correct, but you should still be able to talk to the net from the router.


You will also want to add firewall rules for input (to router) and forward (through router).

4

Yeah, my first through was to try it with one modem, and thanks to that I’ve found out why it wasn’t working.

The second I assign an IP address to my R2N wireless card, the routing ability of my 493G stops working. DNS requests propagate and show up in the cache, but the sites never load. And since I would always assign an IP to the card as the 2nd or third step, I had no idea why it would flat refuse to work. Even the default webpage that shows up when you browse to the router’s IP refuses to load.

Anyone have any idea why the system would be doing that? Keep in mind, I can recreate this exact issue by issuing /system reset /system reboot, setting a dhcp client, setting the two Ethernet interface IPs, then assigning an IP to the wireless card. The problem even persists when a bridge that includes the wireless card is assigned an IP.