Solved: Hi , To test if any port is active or opened by firewall or not, we can use telnet if port is tcp. How to check if the port to be verified is udp one.will telnet work? Thanks!
1433 / TCP, 1434 / UDP – MS-SQL: Microsoft SQL Server is a database application with a long history of security exploits, and is noted for the propagation of the SQLslammer worm. These ports are filtered to prevent exploitation and propagation of such MS-SQL exploits. 1900 / UDP - UPnP: Discovery / SSDP is a service that runs by default on WinXP. 123. NTP UDP Network Time Protocol. 137-139. NetBIOS TCP and UDP TCP/IP legacy support for the outdated NetBOIS protocol. 143. IMAP TCP Internet Message Access Verify that your server UDP 123 port is publicly accessible. Recommended for linux server admins and linux users: How to join your linux server to the NTP pool project How to query and test an NTP server using ntpdate UDP/514. UDP/123. UDP/161 UDP/162. Disaster Recovery Vault (DR) or Satellite Vault. Depending on backup software used. TLS/514. TCP/514. UDP/514. UDP/123. UDP/161 UDP/162. Central Policy Manager (CPM) û: û: UDP/123. û: Password Vault Web Access (PVWA) û: û: UDP/123. û: Privileged Session Manager (PSM) û: û: UDP/123. û: Privileged Sep 09, 2015 · In Windows Server 2008 R2 environment, inbound UDP communication may be blocked when the connection to the network is interrupted and then restored. Inbound TCP and ICMP communications may also be blocked in this situation. This problem occurs if the inbound UDP communication is enabled by Windows Firewall.
UDP (User Datagram Protocol) is a communications protocol that is primarily used for establishing low-latency and loss-tolerating connections between applications on the internet. It speeds up transmissions by enabling the transfer of data before an agreement is provided by the receiving party.
: 20 Implementations send and receive timestamps using the User Datagram Protocol (UDP) on port number 123. They can also use broadcasting or multicasting, where clients passively listen to time updates after an initial round-trip calibrating exchange.
UDP Port Scanner, Online UDP Port Scan, UDP Port Scanning
Sep 09, 2015 · In Windows Server 2008 R2 environment, inbound UDP communication may be blocked when the connection to the network is interrupted and then restored. Inbound TCP and ICMP communications may also be blocked in this situation. This problem occurs if the inbound UDP communication is enabled by Windows Firewall.