Port 53 vulnerabilities zzrqs

The Port and Protocol component also provides a count of vulnerabilities by severity level, adding active and passive vulnerability results by TCP and UDP protocol. Port ranges from 0-1024, covering all Well Known Ports, along with severity levels of low, medium, high, and critical, are displayed.

Oct 04, 2015 · From the reading I did it appears that tcp on port 53 is a security risk because hackers can perform zone transfers and map out information which they should probably not be allowed (still a little unclear exactly how that works) - which is why tcp is usually blocked by most people, however, it is now starting to be used for things like dnssec Fixed source port for generating queries; Some current implementations allocate an arbitrary port at startup (sometimes selected at random) and reuse this source port for all outgoing queries. In some implementations, the source port for outgoing queries is fixed at the traditional assigned DNS server port number, 53/udp. Online UDP port scan available for common UDP services. The UDP port scan is part of the IP Tools range of network testing tools. The test uses the excellent Nmap Port Scanner to scan 5 of the most common UDP ports. Ports tested in the quick UDP scan are DNS 53, TFTP 69, NTP 123, SNMP 161, mDNS 5353, UPNP 1900 and Memcached 11211. The WannaCry TCP port 445 exploit returned the spotlight to the vulnerabilities in Microsoft's long-abused networking port. Network security expert Kevin Beaver explained how to detect and defend

Fixed source port for generating queries; Some current implementations allocate an arbitrary port at startup (sometimes selected at random) and reuse this source port for all outgoing queries. In some implementations, the source port for outgoing queries is fixed at the traditional assigned DNS server port number, 53/udp.

Vulnerabilities The venerable Sendmail MTA, though respected and feared for its mail delivery might, nonetheless has a laundry list of vulnerabilities. That's not particularly surprising considering its age, flexibility and complexity . What follows is a chart of sendmail vulnerabilities listed in the Common Vulnerabilities and Exposures list. Oct 09, 2017 · Based on Censys and Shodan data, we found that about one million publicly accessible hosts are running a Linux distribution that likely includes Dnsmasq, and are exposing a DNS service (port 53) on the public internet. These hosts, under the circumstances explained in this post, are potentially vulnerable to all or some of these vulnerabilities. Aug 15, 2013 · Your underlying objective is to block users from being able to access Port 53 of any IP address, except the IP addresses of the OpenDNS services, which are 208.67.222.222 and 208.67.220.220. The

Common ports, such as TCP port 80 (HTTP), may be locked down — but other ports may get overlooked and be vulnerable to hackers. In your security tests, be sure to check these commonly hacked TCP and UDP ports: TCP port 21 — FTP (File Transfer Protocol) TCP port 22 — SSH (Secure Shell) TCP […]