What port does ntpdate use?
Table of Contents
What port does ntpdate use?
port 123
NTP is a built-on UDP, where port 123 is used for NTP server communication and NTP clients use port 1023 (for example, a desktop).
Can NTP use TCP?
Unlike DNS, NTP never uses TCP, and NTP has no analog to the DNS zone transfer operation. NTP servers may also talk to each other using broadcast or multicast; the multicast address 224.0.
What port is TCP 23?
Telnet protocol
Well-known ports
| Port | TCP | Description |
|---|---|---|
| 22 | Yes | Secure Shell (SSH), secure logins, file transfers (scp, sftp) and port forwarding |
| 23 | Yes | Telnet protocol—unencrypted text communications |
| 25 | Yes | Simple Mail Transfer Protocol (SMTP), used for email routing between mail servers |
| 27 | Assigned | NSW User System FE |
Is port 2022 secure?
UDP port 2022 would not have guaranteed communication in the same way as TCP. Because protocol TCP port 2022 was flagged as a virus (colored red) does not mean that a virus is using port 2022, but that a Trojan or Virus has used this port in the past to communicate.
What is the NTP server address?
| Name | IP Address | Status |
|---|---|---|
| ntp-b.nist.gov | 132.163.96.5 | Authenticated service |
| ntp-wwv.nist.gov | 132.163.97.5 | Authenticated service |
| ntp-c.colorado.edu | 128.138.141.177 | Authenticated service |
| ntp-d.nist.gov | 129.6.15.32 | Authenticated service |
Should I block port 23?
Please block Port 23 and make sure Telnet services are disable. Port 139 – Used by NetBIOS Session Services. Among other things this port is vulnerable to Null session attacks, where an attacker can connect to the Windows IPC share without valid user credentials, and then gain access to other parts of the server.
What is TCP port 23?
This page will attempt to provide you with as much port information as possible on TCP Port 23. TCP Port 23 may use a defined protocol to communicate depending on the application. A protocol is a set of formalized rules that explains how data is communicated over a network.
Is it possible to run ntpd on Port 123?
Doesn’t sound look this is possible…see the ntp troubleshooting page: If you’re going to run ntpd, you need to fix your network/firewall/NAT so that ntpd can have full unrestricted access to UDP port 123 in both directions.
How to debug the time sync with NTP server pool?
-u : Direct ntpdate to use an unprivileged port for outgoing packets. To enable debugging mode you need to use -d option with ntpdate command as shown in below example. In this example we are trying to debug the time sync with NTP Server pool.ntp.org using ntpdate -d pool.ntp.org command as shown below.
What is the default password for the telnet daemon on Port 23/tcp?
The telnet daemon on port 23/tcp can be abused with the gpon/gpon credentials. TX9 Automatic Food Dispenser v3.2.57 devices allow access to a shell as root/superuser, a related issue to CVE-2019-16734. To connect, the telnet service is used on port 23 with the default password of 059AnkJ for the root account.
