Fri Jul 17 15:47:51 PDT 2020. Current Version: 10.0
ubuntu: open udp port 123. Ask Question Asked 7 years, 3 months ago. Active 7 years, 3 months ago. Viewed 9k times 1. into my linux server (Ubuntu 8) I have top open Jul 21, 2016 · Hi. We test the connection with tcp port using the command: telnet IpAdress tcpPort. for instance: telnet 10.10.1.20 8080. but, how can I do to test the connection with an udp port. Outgoing UDP connections on port 123 dropped by firewall. Ask Question Asked 2 years, 11 months ago. Active 2 years, 11 months ago. Viewed 426 times 0. I have the Contrary to the open|filtered, the open result means the specified port sent a response. To use Nmap to scan a specific port use the -p
UDP port 123 is the default NTP port. So check your NTP configuration. The most probably it's standard synchronization. You'd have to capture packets with tcpdump and inspect the content (wireshark).
Nov 15, 2018 · On the Rule Type page, select the “Port” option and then click “Next.” On the next screen, you’ll have to choose whether the port you’re opening uses the Transmission Control Protocol (TCP) or User Datagram Protocol (UDP). Unfortunately, we can’t tell you specifically which to use because different apps use different protocols.
Jan 14, 2020 · e., this port is not listening on the target system or the access to it is restricted by a firewall or some system settings. By default, TCP ports are polled 3 times, and UDP is one. In our example, the DNS server is available from the client both over TCP and UDP ports. TCP port 53 (domain service): LISTENING UDP port 53 (domain service
This site uses cookies for analytics, personalized content and ads. By continuing to browse this site, you agree to this use. Learn more Guaranteed communication over TCP port 12876 is the main difference between TCP and UDP. UDP port 12876 would not have guaranteed communication as TCP. UDP on port 12876 provides an unreliable service and datagrams may arrive duplicated, out of order, or missing without notice.