MikroTik

Posted: **Wed Apr 14, 2010 12:00 am**

We have a SDSL connection at the office using a Draytek 3100V modem. I am currently at the verge of asking my boss to buy another modem, but that's the second part of this post. I still do hope that I missed something obvious. I am rather new with RouterOS, but I love the control that you get with RouterOS and that it actually does what you want to to do

Our ISP assigned us a /29 block. Information as provided:

ip addresses: 92.x.x.176 - 92.x.x.183
default gateway: 92.x.x.177
subnet mask: 255.255.255.248

I have set the Draytek to routed subnet and set the following at my RB:

/ip address
add address=92.x.x.178/29 broadcast=92.x.x.183 comment="" disabled=no interface=sdsl network=92.x.x.176
/ip route
add check-gateway=ping comment="" disabled=yes distance=100 dst-address=0.0.0.0/0 gateway=92.x.x.177 scope=30 target-scope=10

I can actually ping .177, but not anything outside (no ping, no traceroute, etc). Incoming traffic also does not appear to arrive. When I assigned internal 192.168 addresses I can get on the internet (with nat on the modem). But I really want/need to have public ip addresses available to internal devices (routerboard and voip/sip). I also tried the PPPoE Pass-through option of the modem, but according to the pppoe debug info of the RB I'm not getting any PADI packets back. The DMZ host is only partially usable, the modem changes the source address to .178 (nat again), but my sip is still messed up (which is another story).

So two questions, does anybody see any stupid mistakes on my part in the RouterOS config and does anybody have a suggestion for a proper SDSL modem that works nicely with RouterBoard/RouterOS?

This setup is with a RB600A with OS v4.6

MikroTik

using public IP address with SDSL modem

using public IP address with SDSL modem