Oracle and Dyn

Q.43103: What port does DNS use? | Microsoft Exam Quest Nov 12, 2012 Firewall Ports to Open Up For DNS Servers - systemBash Everyone knows that DNS servers use UDP port 53 for queries, right? Well something that I recently learned was that DNS servers also use TCP port 53 to do zone transfers (axfrs). Make sure to open that port up in your firewall if you are allowing zone transfers from your DNS server. Knowing that sooner could have saved me a lot of time!

May 28, 2010

Jun 30, 2016 · Messages are sent over UDP and DNS servers bind to UDP port 53. When the message length exceeds the default message size for a User Datagram Protocol (UDP) datagram (512 octets), the first response to the message is sent with as much data as the UDP datagram will allow, and then the DNS server sets a flag indicating a truncated response.

What port does DNS use? Solutions | Experts Exchange

What port does DNS use? Solutions | Experts Exchange What port does DNS use? Andrew Angell asked on 2005-08-29. Windows Networking; 4 Comments. 1 Solution. Medium Priority. 2,857 Views. Last Modified: 2012-08-14. Our local network tends to have DNS problems. I've never been able to figure them out, but anytime it happens I switch to using the DNS server my dedicated web server uses and it fixes it. DNS (Domain Name System) uses Port 53 TCP/UDP. What are The DNS uses TCP Port 53 for zone transfers, for maintaining coherence between the DNS database and the server. The UDP protocol is used when a client sends a query to the DNS server. The TCP protocol should not be used for queries as it gives a lot of information, which is useful to attackers. What is an SMB Port + Ports 445 and 139 Explained | Varonis Mar 29, 2020 Question about port for NSLOOKUP - Google Groups