TCP/UDP Port Finder

Enter port number (e.g. 21), service (e.g. ssh, ftp) or threat (e.g. nimda)
Database updated - March 30, 2016

Search results for "lo"

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Port: 257/TCP
257/TCP - Known port assignments (3 records found)
  • Service
    Details
    Source
  • set
    Secure Electronic Transaction
    IANA
  • fw1
    Checkpoint Firewall-1
    SANS
  • threat
    [threat] FW1 logging
    Bekkoame
Port: 264/TCP
264/TCP - Known port assignments (4 records found)
  • Service
    Details
    Source
  • bgmp
    BGMP
    IANA
  •  
    BGMP, Border Gateway Multicast Protocol (Official)
    WIKI
  • bgmp
    -
    SANS
  • threat
    [threat] FW1_topo FW1 can be flooded on this port in order to cause CPU utilization to reach 100% and stopping managers from connecting. However, it requires a fast link and access to that port, probably from the local network.
    Bekkoame
Port: 313/TCP
313/TCP - Known port assignments (2 records found)
  • Service
    Details
    Source
  • magenta-logic
    Magenta Logic
    IANA
  • magenta-logic
    -
    SANS
Port: 313/UDP
313/UDP - Known port assignments (2 records found)
  • Service
    Details
    Source
  • magenta-logic
    Magenta Logic
    IANA
  • magenta-logic
    -
    SANS
Port: 352/TCP
352/TCP - Known port assignments (4 records found)
  • Service
    Details
    Source
  • bhoedap4
    bhoedap4
    IANA
  • bhoedap4
    bhoedap4 (added 5/21/97)
    Bekkoame
  • dtag-ste-sb
    DTAG (assigned long ago)
    Bekkoame
  • dtag-ste-sb
    DTAG or bhoedap4
    SANS
Port: 389/TCP
389/TCP - Known port assignments (3 records found)
  • Service
    Details
    Source
  • ldap
    Lightweight Directory Access Protocol
    IANA
  •  
    Lightweight Directory Access Protocol (LDAP) (Official)
    WIKI
  • ldap
    Lightweight Directory Access Protocol (LDAP). Used by applications that look up addresses, such as Mail and Address Book.
    Apple
Port: 427/TCP
427/TCP - Known port assignments (3 records found)
  • Service
    Details
    Source
  • svrloc
    Server Location
    IANA
  •  
    Service Location Protocol (SLP) (Official)
    WIKI
  • svrloc
    Service Location Protocol (SLP). Network Browser
    Apple
Port: 427/UDP
427/UDP - Known port assignments (3 records found)
  • Service
    Details
    Source
  • svrloc
    Server Location
    IANA
  •  
    Service Location Protocol (SLP) (Official)
    WIKI
  • svrloc
    Service Location Protocol (SLP). Network Browser
    Apple
Port: 480/TCP
480/TCP - Known port assignments (2 records found)
  • Service
    Details
    Source
  • iafdbase
    iafdbase
    IANA
  • loadsrv
    -
    SANS
Port: 512/TCP
512/TCP - Known port assignments (3 records found)
  • Service
    Details
    Source
  • exec
    remote process execution; authentication performed using passwords and UNIX login names
    IANA
  •  
    Rexec, Remote Process Execution (Official)
    WIKI
  • exec
    BSD rexecd(8)
    SANS
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About TCP/UDP ports

TCP port 257 uses the Transmission Control Protocol. TCP is one of the main protocols in TCP/IP networks. TCP is a connection-oriented protocol, it requires handshaking to set up end-to-end communications. Only when a connection is set up user's data can be sent bi-directionally over the connection.
Attention! TCP guarantees delivery of data packets on port 257 in the same order in which they were sent. Guaranteed communication over TCP port 257 is the main difference between TCP and UDP. UDP port 257 would not have guaranteed communication as TCP.
UDP on port 257 provides an unreliable service and datagrams may arrive duplicated, out of order, or missing without notice. UDP on port 257 thinks that error checking and correction is not necessary or performed in the application, avoiding the overhead of such processing at the network interface level.
UDP (User Datagram Protocol) is a minimal message-oriented Transport Layer protocol (protocol is documented in IETF RFC 768).
Application examples that often use UDP: voice over IP (VoIP), streaming media and real-time multiplayer games. Many web applications use UDP, e.g. the Domain Name System (DNS), the Routing Information Protocol (RIP), the Dynamic Host Configuration Protocol (DHCP), the Simple Network Management Protocol (SNMP).
TCP vs UDP - TCP: reliable, ordered, heavyweight, streaming; UDP - unreliable, not ordered, lightweight, datagrams.
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