how to stealth port no. 513, and 514 in my router

[jraju]

Hi, Philips thanks for the reply. But the exceptions are given in the settings of the avast program. I also accept the remedy by you, But change to google dns , pose a new problem of giving access to the router by the google dns to unknown servers. Changing to open dns also has the same problem. since those servers are having filters , they could just hide the server hijacks.
As one come to this site to improve my knowledge about the routers, i am continuing this thread.
Your words
If your DNS servers hijack certain results, Please say something more, on why?

[Philip]

There are multiple reasons that some DNS servers change results, it could be any of the following:
- to protect you from sites that are deemed malicious (like Google, for example)
- to show you ads for non-existing domains (some ISPs do that, they show you their own results instead of the browser error page)
- to track your browsing (by your ISP) for their internal reasons, to improve transparent proxies cache, to sell your data, whatever.

In addition, there is a type of DNS hijacking by malicious software that has infected your computer and redirects some of your browsing.