On Unix-like operating systems, a process must execute with superuser to bind a network socket to an IP address using one of the well-known ports. 53, Yes, Yes, Official, Domain Name System (DNS).
Details of the reserved ports are listed on most systems in the /etc/services file, re-mail-ck 50/udp domain 53/tcp # Domain Name Server domain 53/udp mtp /tcp # SNMP Unix Multiplexer smux /udp at-rtmp /tcp # AppleTalk.
Table C-1 lists the Well Known Ports as defined by IANA and is used by Red Hat Enterprise Linux as default 53, domain, domain name services (such as BIND). 63, whois , uucp-path, Unix-to-Unix Copy Protocol (UUCP) Path services.
tcp Reserved 0 udp Reserved 0 tcpmux tcp TCP Port Service Multiplexer 1 tcpmux Protocol 52 domain tcp Domain Name Server 53 domain udp Domain Name .. Int'l License Server dbase tcp dBASE Unix dbase udp dBASE Unix.
List of well known, registered, and dynamic/private ports. Armstrong domain 53 /tcp Domain Name Server domain 53/udp Domain Name Server .. Chuck Spitz dbase /tcp dBASE Unix dbase /udp dBASE Unix # Don Gibson # mpp.
The TCP/IP port numbers below are special in that normal users are not allowed to run servers on them. This is a security feaure, in that if you connect to a service on one of these ports you can be fairly sure that you have Under Unix .
Listing all the LISTENING Ports of TCP and UDP connections netstat -lx Active UNIX domain sockets (only servers) Proto RefCnt Flags Type.
You can check the details of the reserved ports in the /etc/services of sockets such as PACKET, TCP, UDP, DCCP, RAW, Unix domain, etc.
Common/Popular IANA-Registered Ports; UNIX-Specific Ports; Ports Submitted To 53, TCP, domain, domain name services (such as BIND).
The following reference provides a comprehensive list of port requirements for . to a designated server (usually a domain . Linux/Unix Script Monitor- This field allows you to specify the port number used for .. All rights reserved worldwide.
Sockets in the UNIX domain are not considered part of the network protocols .. An Internet domain service resides at a specific, well-known port and uses a.