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Forcing Router DNS / Blocking Port 53 @ Clients - NETGEAR In my previous Netgear router/AP I went into SECURITY, then BLOCKED SERVICES and added a new rule to block PORT 53 for 192.168.0.2-192.168.0.254 (assuming … Port 53 | Article about Port 53 by The Free Dictionary All of the attacks from port 53 originated from two IPs, 89.165.0.14 and 178.234.40.253, and those two IPs used only that port to attack from. The two IPs that used port 53 exclusively had pinged this Norse sensor as early as April 22, 2014, but touched it only 26 times … Windows XP/Server 2003 may be listening on UDP Port 53 Sep 21, 2012
Sep 11, 2014
Port 53 is reserved for the Domain Name System (DNS). In your case it is the DNS cacher dnsmasq of the package dnsmasq-base.This pre-installed package is a dependency of network-manager, the network manager of your desktop environment (e.g. Unity, GNOME, …).. For this reason, don't uninstall the package dnsmasq-base and/or disable the service. Install bind9 and all is fine telnet to port 53 - Cisco Community
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Jul 13, 2005 · The domain name service provided by BIND (named) software. It uses both UDP and TCP protocol and listen on port 53. DNS queries less than 512 bytes are transferred using UDP protocol and large queries are handled by TCP protocol such as zone transfer. ADVERTISEMENTS i) named/bind server – TCP/UDP port 53 ii)Client (browser, dig … Continue reading "Linux Iptables block or open DNS In another well-known case, versions of the Zone Alarm personal firewall up to 2.1.25 allowed any incoming UDP packets with the source port 53 (DNS) or 67 (DHCP). A 2005 answer in Seclists.org provides a quote from a previous version of the Reference Guide:--source_port