Bridge the router - direct connection

Is it possible to bridge the router (mikrotik routeOS v5.15) to get the direct connection to the internet network?

I need this possibility because mikrotik seems not to be able to serve some UDP protocols.
So i have to connect computer directly to the adsl several times a week

Im not sure I understand why you would want to do it but sure you can.

http://wiki.mikrotik.com/wiki/Manual:Interface/Bridge

What kind of problems are you having? Maybe we could help figure them out.

Because I can’t connect for example to o2 voip management using ports 2205, 2207 or to RTMFP server

So I need the possibility to work with internet directly without mikrotik proxy.
It’s an emergency solution, but it’s a bit comfortable than repluging cables

If you’re using NAT and don’t want to expose your entire network by bridging to the internet, you could add an explicit NAT-All rule at the end of your nat config to create a DMZ to a required machine. The advantage being that you could enable and disable the rules only when you needed them.

/ip firewall nat add chain=dstnat action=dst-nat in-interface=<WAN> protocol=tcp to-address=192.168.1.X
/ip firewall nat add chain=dstnat action=dst-nat in-interface=<WAN> protocol=udp to-address=192.168.1.X