Port(s) Protocol Service Details Source; 123 : udp: NTP: Network Time Protocol (NTP) - used for time synchronization []Security Concerns: It provides both information and possible avenue of attack for intruders.
> Thing is, the 123 UDP port needs to be open with the package ntp and > its daemon ntpd. "Open port" is one of those concepts which often gets misused and/or misunderstood. Your local NTP _client_ program certainly needs to reach port 123 on some time server(s) in the outside world, but, by default, the router Feb 12, 2014 · NTP is a widely deployed time synchronization service listening on UDP port 123. The attacker spoofs source IPs and sends a small query to a vulnerable NTP server, which generates a large reply of response data to the spoofed addresses. Port: 88, Protocol: UDP Port: 53, Protocol: both (TCP & UDP) Port: 3074, Protocol: both (TCP & UDP) NOTE: For assistance on setting up a static IP address on your Xbox 360, contact Xbox support. Step 4: Under Application Name, enter “xboxlive” for each of the lines that you’ll be working on. You may enter a name you prefer. How to Open a Port in Ubuntu Firewall. In This UFW Tutorial We are going to Learn How to open a port in Ubuntu Firewall. ufw allow command use to open port in Ubuntu Firewall. By default, if you did not specify the protocol, the port will open for both TCP and UDP protocols.
Feb 12, 2014 · NTP is a widely deployed time synchronization service listening on UDP port 123. The attacker spoofs source IPs and sends a small query to a vulnerable NTP server, which generates a large reply of response data to the spoofed addresses.
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). Add the port you need to open and click Next. Add the protocol (TCP or UDP) and the port number into the next window and click Next. Select Allow the connection in the next window and hit Next. Jun 14, 2018 · When I use the scanany app from my smart phone (on the same network) I only see UDP ports 137, 1900, 5353, & 5355 open. I’m attaching the export from the firewall page . Note I set up two entries, one with just 161 and 162 and the other with all four ports I need for the Tripp Lite PANSA to work
NTP Port UDP 123. NTP uses the UDP port number 123 by default. NTP services run on UDP protocol because of the UDP simplicity and performative behavior. NTP is also a very simple protocol just like ask and get response manner which is very well suited with the connectionless UDP protocol. Reliable NTP Port TCP 123
Add the port you need to open and click Next. Add the protocol (TCP or UDP) and the port number into the next window and click Next. Select Allow the connection in the next window and hit Next. Jun 14, 2018 · When I use the scanany app from my smart phone (on the same network) I only see UDP ports 137, 1900, 5353, & 5355 open. I’m attaching the export from the firewall page . Note I set up two entries, one with just 161 and 162 and the other with all four ports I need for the Tripp Lite PANSA to work