The DNS servers on most routers seem to be pure forwarders though, with no caching. Accessing DNS from the outside Many routers allow port 53 (UDP and TCP) on the WAN port the router to be portmapped to port 53 (UDP and TCP) on the inside of the router itself, exposing the DNS on the router to the outside world. Please note that the methods described here are possible ways to get access to DNS, but I have not actually got them to work, or have not found the time to work on it, like in the case of making a customized firmware. There are a few possible ways how this could be done, where UPnP can be used as part of the hack. Getting access to DNS with UPnP One of the goals of taking over the router is to get control of the Domain Name System on the router, so an attacker can reroute traffic of certain sites to his own site (a so called 'man in the middle' attack). However, the practice of denying TCP port 53 to and from DNS servers is starting to cause some problems. REVIEW: Best VPN routers for small business. SG Ports Services and Protocols - Port 53 tcp/udp information, official and unofficial assignments, known security risks, trojans and applications use. Thiruppavai Lyrics In Tamil Pdf With Meaning.
