I recently installed a Samsung home security system. The dvr is hooked to a Linksys router. When I put the address for the security system or try to view the cameras it takes me to a mikrotik V6.7 sign in with admin as a user name. I have tried to sign in with any passwords as I know and also left it blank, no luck. I have never seen mikrotik before on my computer. Do I need this, what is this? How did this show up? Do I need this? Thanks

looks like your ISP has misconfigured something, please contact them and ask for help. MikroTik is the brand of your ISP network router.

You need to learn how to use CMD, command prompt to find the IP of your DVR. You can see how I do it here. http://forum.mikrotik.com/viewtopic.php?f=13&t=84903

You may need to change some Network Connections to get there as mentioned in that thread in order to find that ip.