What uses TCP port 123?

What uses TCP port 123?

Port 123 Details Info gathered can include system uptime, time since reset, time server pkt, I/O & memory statistics and ntp peer list. If a host is susceptible to time altering via ntp an attacker can possibly: 1) Run replay attacks using captured OTP and Kerberos tickets before they expire.

Is port 123 a TCP or UDP?

NTP is a UDP-based service. NTP servers use well-known port 123 to talk to each other and to NTP clients. NTP clients use random ports above 1023.

What is the port number for LDAP?

LDAPS communication occurs over port TCP 636. LDAPS communication to a global catalog server occurs over TCP 3269. When connecting to ports 636 or 3269, SSL/TLS is negotiated before any LDAP traffic is exchanged.

How would you tell Nmap to scan all ports?

By default, Nmap scans the 1,000 most popular ports of each protocol it is asked to scan. Alternatively, you can specify the -F (fast) option to scan only the 100 most common ports in each protocol or –top-ports to specify an arbitrary number of ports to scan.

Do I need to open port 123?

For a server behind a firewall that you want clients to be able to access, you would need to open (destination) UDP/123 inbound, and if outbound traffic by default is blocked then you would need to let (source) UDP/123 outbound to reply back to the requests.

What port is TCP 23?

Telnet protocol
Well-known ports

Port	TCP	Description
21	Yes	File Transfer Protocol (FTP) control (command)
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

How do I connect to port 23?

Resolutions

1. Click the Start menu then search for/select Windows Firewall.
2. Select Advanced Settings.
3. Select Inbound Rules from the left hand pane.
4. Under Inbound Rule Actions.
5. For the Rule Type select Port, click next, then select TCP and Specific Local Ports.
6. Enter 23 for the port number and click next.

What ports are used by LDAP?

TCP/UDP: Typically, LDAP uses TCP or UDP (aka CLDAP) as its transport protocol. The well known TCP and UDP port for LDAP traffic is 389. SSL/TLS: LDAP can also be tunneled through SSL/TLS encrypted connections. The well known TCP port for SSL is 636 while TLS is negotiated within a plain TCP connection on port 389.

Can LDAP be tunneled through TCP?

SSL/TLS: LDAP can also be tunneled through SSL/TLS encrypted connections. The well known TCP port for SSL is 636 while TLS is negotiated within a plain TCP connection on port 389. https://wiki.wireshark.org/LDAP

What is the LDAP TCP and UDP 389 port?

The port of LDAP TCP and UDP 389 is assigned by the IANA which is an international standardization institution. We can see below the registration information and contact for the port registration. TCP and UDP 389 For LDAP TCP and UDP 636 Secure or SSL LDAP

What is Port 123 in TCP?

Port 123 Details. TCP is the most commonly used protocol on the Internet and any TCP/IP network. Whereas the IP protocol deals only with packets, TCP enables two hosts to establish a connection and exchange streams of data. TCP guarantees delivery of data and that packets will be delivered in the same order in which they were sent.