Have you been thinking Mikrotik Router you safe? If the answer is "yes" you try to look at your Winbox, click the IP, Firewall, Connections. Try to look carefully at the column Dst. Address. Therein appears the clients access the internet with the aim of his address. Take a good look as well behind that in the ip-ip have access to the ports as a destination for access. The ports are common and can be accessed is 80 for WWW, 5050 to YM, YM 5100 for webcam, 443 for https, 8291 to Winbox, 667 for Mirc, 21 for FTP, 22 for SSH, and 23 for Telnet. After considering carefully the ip firewall connections in Winbox, if you find the ports other than port over? If the answer is "yes" means there is a problem hmmm side clients with access the Internet through ports that are not allowed, or the client deliberately using the port open, or there is a virus that attacks and active so disturbing traffict. As a result the internet slow ... slow ... and make irritated ... ping DNS weariness again normal but can not browse it ... If this condition occurs on your Mikrotik it is necessary to restrict access only specific ports. In addition to ports that are allowed will be rejected / denied that Mikrotik us safe.
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