Overview of common TCP and UDP Default Ports
How to Filter By Port in Wireshark – Linux Hint So destination port should be port 80. Now we put “tcp.port == 80” as Wireshark filter and see only packets where port is 80. Here is the explanation screenshot. 2. Port 53: Port 53 is used by DNS. Let’s see one DNS packet capture. Here 192.168.1.6 is trying to send DNS query. So destination port should be port 53. tcpdump - University of California, Berkeley 2.Capture both DNS packets and TCP packets to/from quasar.cs.berkeley.edu • tcpdump “(tcp and host quasar.cs.berkeley.edu) or udp port 53” How to write filters •Refer cheat sheet slides at the end of this presentation •Refer the tcpdump man page Two simple filters for wireshark to analyze TCP and UDP
May 28, 2010
Aug 27, 2019 HTTP GET Request on port 53 – OpenDNS
TCP health checks – Route 53 must be able to establish a TCP connection with the endpoint within ten seconds.. HTTP and HTTPS health checks with string matching – As with HTTP and HTTPS health checks, Route 53 must be able to establish a TCP connection with the endpoint within four seconds, and the endpoint must respond with an HTTP status code of 2xx or 3xx within two seconds after
The Transmission Control Protocol (TCP) is one of the main protocols of the Internet protocol suite.It originated in the initial network implementation in which it complemented the Internet Protocol (IP). Therefore, the entire suite is commonly referred to as TCP/IP.TCP provides reliable, ordered, and error-checked delivery of a stream of octets (bytes) between applications running on hosts telnet to port 53 - Cisco Community However DNS use BOTH Udp and Tcp so it listens on both protocols. Udp for small stuff like asking one address or something like that, and for larger transfers such as zone and so on it will switch to using Tcp. so yes it might work to test with using tcp port 53.