known port assignments and vulnerabilities
threat/application/port search:
| Port(s) | Protocol | Service | Details | Source |
|---|
| 2255 | tcp | trojan | Nirvana | SG |
| 2255 | tcp | Nirvana | [trojan] Nirvana | SANS |
| 2255 | tcp,udp | vrtp | VRTP - ViRtue Transfer Protocol | IANA |
| jump to: 
|
« back to SG Ports
External Resources
SANS Internet Storm Center: port 2255
Notes:
Port numbers in computer networking represent communication endpoints. Ports are unsigned 16-bit integers (0-65535) that identify a specific process, or network service. IANA is responsible for internet protocol resources, including the registration of commonly used port numbers for well-known internet services.
Well Known Ports: 0 through 1023.
Registered Ports: 1024 through 49151.
Dynamic/Private : 49152 through 65535.
TCP ports use the Transmission Control Protocol, the most commonly used protocol on the Internet and any TCP/IP network. 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. Guaranteed communication/delivery is the key difference between TCP and UDP.
UDP ports use the Datagram Protocol. Like TCP, UDP is used in combination with IP (the Internet Protocol) and facilitates the transmission of datagrams from one computer to applications on another computer, but unlike TCP, UDP is connectionless and does not guarantee reliable communication; it's up to the application that received the message to process any errors and verify correct delivery. UDP is often used with time-sensitive applications, such as audio/video streaming and realtime gaming, where dropping some packets is preferable to waiting for delayed data.
When troubleshooting unknown open ports, it is useful to find exactly what services/processes are listening to them. This can be accomplished in both Windows command prompt and Linux variants using the "netstat -aon" command. We also recommend runnig multiple anti-virus/anti-malware scans to rule out the possibility of active malicious software. For more detailed and personalized help please use our forums.
Please use the "Add Comment" button below to provide additional information or comments about port 2255. Post your review/comments |
|
FAQs
SSH uses TCP, not UDP (User Datagram Protocol). Unlike TCP, UDP is a connectionless protocol, which means it doesn't make sure the recipient is ready to receive files before sending them. As a result, data can arrive out of order, in pieces or not at all. Although SSH typically uses TCP, it doesn't have to.
Is telnet TCP or UDP? ›
Telnet uses the TCP port protocol and port 23 to establish a connection with remote computers.
Is port 25 TCP or UDP? ›
Well-known ports
| Port | TCP | UDP |
|---|
| 23 | Yes | Assigned |
| 25 | Yes | Assigned |
| 27 | Assigned |
| 28 | Unofficial | |
127 more rowsPort 55555 Details
| Port(s) | Protocol | Service |
|---|
| 55555 | tcp | trojan |
| 55555 | tcp | trojan |
UDP ports depend on the UDP/IP protocols. UDP ports include the DNS port (53), the Dynamic Host Configuration Protocol port (68), and the Kerberos port (88), which is used by gaming services.
What port is SSH UDP TCP? ›
Port 22 Details
| Port(s) | Protocol | Service |
|---|
| 22 | tcp | threat |
| 22 | udp | |
| 22 | tcp,udp | ssh |
| 22 | sctp | ssh |
14 more rowsSSH always uses TCP as it is connection-oriented, whereas UDP is connectionless (refers to network protocols that a host can send a message without establishing a connection in hopes that the message will reach its destination.)
Does SMTP use both TCP and UDP? ›
SMTP and Email
All three use TCP, and the last two are used for accessing electronic mailboxes. Special records stored in DNS servers play a role as well, using UDP.
What is the difference between TCP and UDP? ›
The main difference between TCP (transmission control protocol) and UDP (user datagram protocol) is that TCP is a connection-based protocol and UDP is connectionless. While TCP is more reliable, it transfers data more slowly. UDP is less reliable but works more quickly.
What are the 4 standard ports for SMTP? ›
An SMTP port is the port designated for use by SMTP — as stated above, this has been ports 25, 465, 587, and 2525 at various times and in various situations.
Use the lsof command, a variant of the netstat -af command to identify TCP sockets that are in the LISTEN state and idle UDP sockets that are waiting for data to arrive.
Is DHCP using TCP or UDP? ›
The DHCP employs a connectionless service model, using the User Datagram Protocol (UDP). It is implemented with two UDP port numbers for its operations which are the same as for the bootstrap protocol (BOOTP). The server listens on UDP port number 67, and the client listens on UDP port number 68.
What port does DNS use? ›
A DNS server uses well-known port 53 for all its UDP activities and as its server port for TCP. It uses a random port above 1023 for TCP requests. A DNS client uses a random port above 1023 for both UDP and TCP.
Is port 22 TCP or UDP? ›
Because SSH port 22 is both tcp and udp. Labels: Other Networking.
What type of port is SSH? ›
SSH port 22
The port is used for Secure Shell (SSH) communication and allows remote administration access to the VM.
Is SSH SFTP TCP or UDP? ›
SFTP uses transmission control protocol (TCP), not user datagram protocol (UDP). Here's why that matters: Before computers send or receive data, they can either verify that the other computer is ready to receive files or not.
Is SSH tunnel TCP over TCP? ›
Using SSH Tunnels is not TCP over TCP. You have a TCP connection between local app and SSH client, then a second TCP connection between SSH client and SSH server, and a third TCP connection between SSH server and remote app. There is no TCP over TCP when you use SSH tunnels.
Home » Ports Database » Port Details 