HTTP, TCP, UDP common ports, 455 ports, 443 ports

The HTTP, TCP, UDP common port comparison table lists the most common communication ports used by services, daemons, and programs in Linux.Tips: Ctrl+F Quickly find the Http port number (point title can shrink or expand)

No1. Most commonly used ports

Port number/layer	name	Comments
1	tcpmux	TCP port service multiplexing
5	rje	Remote job portal
7	echo	Echo Services
9	discard	Empty service for connection tests
11	systat	Used to list the system status of connected ports
13	daytime	Send date and time to request host
17	qotd	Send daily motto to connected hosts
18	msp	Message sending protocol
19	chargen	Character generation service; send endless character streams
20	ftp-data	FTP data port
21	ftp	File Transfer Protocol (FTP) port; sometimes used by File Service Protocol (FSP)
22	ssh	Secure Shell (SSH) Services
23	telnet	Telnet Services
25	smtp	Simple Mail Transfer Protocol (SMTP)
37	time	Time Agreement
39	rlp	Resource Location Protocol
42	nameserver	Internet Name Service
43	nicname	WHOIS Directory Service
49	tacacs	Terminal access controller access control system for TCP/IP authentication and access based on
50	re-mail-ck	Remote mail check protocol
53	domain	Domain name services (such as BIND)
63	whois++	WHOIS++, the extended WHOIS service
67	bootps	Boot Protocol (BOOTP) service; also used by Dynamic Host Configuration Protocol (DHCP) service
68	bootpc	Bootstrap (BOOTP) client; also used by Dynamic Host Configuration Protocol (DHCP) clients
69	tftp	Small File Transfer Protocol (TFTP)
70	gopher	Gopher Internet Document Search and Retrieval
71	netrjs-1	Remote Job Service
72	netrjs-2	Remote Job Service
73	netrjs-3	Remote Job Service
73	netrjs-4	Remote Job Service
79	finger	Finger service for user contact information
80	http	Hypertext Transfer Protocol (HTTP) for World Wide Web (WWW) Services
88	kerberos	Kerberos Network Verification System
95	supdup	Telnet protocol extension
101	hostname	Hostname service on SRI-NIC machine
102	iso-tsap	ISO Development Environment (ISODE) Network Application
105	csnet-ns	Email name server; also used by CSO name server
107	rtelnet	Remote Telnet
109	pop2	Post Office Agreement Version 2
110	pop3	Post Office Agreement Version 3
111	sunrpc	Remote procedure call (RPC) protocol used for remote command execution, used by network file system (NFS)
113	auth	Verification and Identity Protocols
115	sftp	Secure File Transfer Protocol (SFTP) Service
117	uucp-path	Unix to Unix Replication Protocol (UUCP) Path Service
119	nntp	Network News Transfer Protocol (NNTP) for USENET Discussion Systems
123	ntp	Network Time Protocol (NTP)
137	netbios-ns	NETBIOS name service used by Samba in Red Hat Enterprise Linux
138	netbios-dgm	NETBIOS Datagram Service used by Samba in Red Hat Enterprise Linux
139	netbios-ssn	NET BIOS Session Service used by Samba in Red Hat Enterprise Linux
143	imap	Internet Message Access Protocol (IMAP)
161	snmp	Simple Network Management Protocol (SNMP)
162	snmptrap	SNMP trap
163	cmip-man	General Management Information Protocol (CMIP)
164	cmip-agent	General Management Information Protocol (CMIP)
174	mailq	MAILQ
177	xdmcp	X Display Manager Control Protocol
178	nextstep	NeXTStep Window Server
179	bgp	Border Network Protocol
191	prospero	Cliffod Neuman's Prospero Service
194	irc	Internet Relay Chat (IRC)
199	smux	SNMP UNIX Multiplexing
201	at-rtmp	AppleTalk
202	at-nbp	AppleTalk name binding
204	at-echo	AppleTalk echo service
206	at-zis	AppleTalk Block Information
209	qmtp	Fast Mail Transfer Protocol (QMTP)
210	z39.50	NISO Z39.50 database
213	ipx	Internet Packet Switching Protocol (IPX), a datagram protocol commonly used by Novell Netware environment
220	imap3	Internet Message Access Protocol Version 3
245	link	LINK
347	fatserv	Fatmen Server
363	rsvp_tunnel	RSVP Tunnel
369	rpc2portmap	Coda File System Port Mapper
370	codaauth2	Coda file system verification service
372	ulistproc	UNIX Listserv
389	ldap	Lightweight Directory Access Protocol (LDAP)
427	svrloc	Service Location Agreement (SLP)
434	mobileip-agent	Removable Internet Protocol (IP) Proxy
435	mobilip-mn	Removable Internet Protocol (IP) Manager
443	https	Secure Hypertext Transfer Protocol (HTTP)
444	snpp	Small network paging protocol
445	microsoft-ds	Server Message Block (SMB) via TCP/IP
464	kpasswd	Kerberos password and key change service
468	photuris	Photoris Session Key Management Protocol
487	saft	Simple Asymmetric File Transfer (SAFT) Protocol
488	gss-http	Universal Security Service (GSS) for HTTP
496	pim-rp-disc	Convergence point discovery (RP-DISC) for protocol-independent multiple access propagation (PIM) services
500	isakmp	Internet Security Association and Key Management Protocol (ISAKMP)
535	iiop	Internet Internal Object Request Proxy Protocol (IIOP)
538	gdomap	GNUstep Distributed Object Mapper (GDOMAP)
546	dhcpv6-client	Dynamic Host Configuration Protocol (DHCP) Version 6 Customer
547	dhcpv6-server	Dynamic Host Configuration Protocol (DHCP) Version 6 Service
554	rtsp	Real-time streaming protocol (RTSP)
563	nntps	Network News Transfer Protocol (NNTPS) via Secure Sockets Layer
565	whoami	whoami
587	submission	Mail Message Submission Agent (MSA)
610	npmp-local	Network Peripheral Management Protocol (NPMP) Local/Distributed Queuing System (DQS)
611	npmp-gui	Network Peripheral Management Protocol (NPMP) GUI/Distributed Queuing System (DQS)
612	hmmp-ind	HMMP Indication/DQS
631	ipp	Internet Printing Protocol (IPP)
636	ldaps	Lightweight Directory Access Protocol (LDAPS) via Secure Sockets Layer
674	acap	Application Configuration Access Protocol (ACAP)
694	ha-cluster	Heartbeat service for clusters with high availability
749	kerberos-adm	"kadmin" database management for Kerberos version 5 (v5)
750	kerberos-iv	Kerberos version 4 (v4) service
765	webster	Online dictionary
767	phonebook	Internet phone book
873	rsync	rsync file transfer service
992	telnets	Telnet (TelnetS) through secure socket layer
993	imaps	Internet Message Access Protocol (IMAPS) through Secure Sockets Layer
994	ircs	Internet Relay Chat (IRCS) via Secure Sockets Layer
995	pop3s	Post Office Protocol Version 3 (POPS3) via Secure Sockets Layer

UNIX-specific ports (the following ports are UNIX-specific and involve services ranging from email to verification. The name in square brackets (such as [service]) is the daemon name of the service or its common alias)

Port number/layer	name	Comments
512/tcp	exec	Used to verify remotely executed processes
512/udp	biff[comsat]	Asynchronous mail clients (biffs) and services (comsats)
513/tcp	login	Remote login (rlogin)
513/udp	who[whod]	List of logged in users
514/tcp	shell[cmd]	Remote shell (shell) and remote replication (rcp) that do not have to log in
514/udp	syslog	UNIX System Log Service
515	printer[spooler]	Printer (lpr) spooler
517/udp	talk	Remote conversation services and customers
518/udp	ntalk	Network chat (ntalk), remote conversation services and customers
519	utime[unixtime]	UNIX Time Protocol (utime)
520/tcp	efs	Extended File Name Server (EFS)
520/udp	router[route,routed]	RIP Protocol
521	ripng	Route selection information protocol for Internet Protocol Version 6 (IPv6)
525	timed[timeserver]	Time daemon (timed)
526/tcp	tempo[newdate]	Tempo
530/tcp	courier[rpc]	Courier Remote Procedure Call (RPC) Protocol
531/tcp	conference[chat]	Internet Relay Chat
532	netnews	Netnews
533/udp	netwall	Networkall for emergency broadcasting
540/tcp	uucp[uucpd]	Unix to Unix replication service
543/tcp	klogin	Kerberos version 5 (v5) remote login
544/tcp	kshell	Kerberos version 5 (v5) remote shell
548	afpovertcp	Appletalk File Programming Protocol (AFP) through Transmission Control Protocol (TCP)
556	remotefs[rfs_server,rfs]	Brunhoff's Remote File System (RFS)

Registered ports (lists the ports submitted by the network and software communities to IANA to be officially registered in the port number list)

Port number/layer	name	Comments
1080	socks	SOCKS Web Application Proxy Service
1236	bvcontrol[rmtcfg]	Garcilis Packeten Remote Configuration Server
1300	h323hostcallsc	H.323 conference call host phone security
1433	ms-sql-s	Microsoft SQL Server
1434	ms-sql-m	Microsoft SQL Monitor
1494	ica	Citrix ICA Customers
1512	wins	Microsoft Windows Internet Name Server
1524	ingreslock	Ingres Database Management System (DBMS) Locking Service
1525	prospero-np	Prospero without privileges
1645	datametrics[old-radius]	Datametrics/Old Radius Project
1646	sa-msg-port[oldradacct]	sa-msg-port/Old radacct project
1649	kermit	Kermit file transfer and management services
1701	l2tp[l2f]	Layer 2 Tunnel Service (LT2P)/Layer 2 Forwarding (L2F)
1718	h323gatedisc	H.323 Telecommunication Gatekeeper Device Discovery Mechanism
1719	h323gatestat	H.323 Telecommunication Gate Guarding Device Status
1720	h323hostcall	H.323 Telecommunications Hosting Telephone Settings
1758	tftp-mcast	Small file FTP multicast
1759	mtftp	Multicast small file FTP (MTFTP)
1789	hello	Hello router communication port
1812	radius	Radius dial-up verification and accounting services
1813	radius-acct	Radius Accounting
1911	mtp	Starlight Network Multimedia Transmission Protocol (MTP)
1985	hsrp	Cisco Hot Standby Router Protocol
1986	licensedaemon	Cisco License Management Daemon
1997	gdp-port	Cisco Gateway Discovery Protocol (GDP)
2049	nfs[nfsd]	Network File System (NFS)
2102	zephyr-srv	Zephyr Notification Transmission and Send Server
2103	zephyr-clt	Zephyr serv-hm connection
2104	zephyr-hm	Zephyr Host Manager
2401	cvspserver	Parallel Version System (CVS) Client/Server Operations
2430/tcp	venus	Venus cache manager for Coda file system (codacon port)
2430/udp	venus	Venus cache manager for Coda file system (callback/wbc interface)
2431/tcp	venus-se	Side effects of Venus Transmission Control Protocol (TCP)
2431/udp	venus-se	Side effects of Venus User Datagram Protocol (UDP)
2432/udp	codasrv	Coda file system server port
2433/tcp	codasrv-se	Side effects of Coda file system TCP
2433/udp	codasrv-se	Coda file system UDP SFTP side effects
2600	hpstgmgr[zebrasrv]	HPSTGMGR; Zebra chooses the way
2601	discp-client[zebra]	discp customer; Zebra integrated shell
2602	discp-server[ripd]	discp server; route selection information protocol daemon (ripd)
2603	servicemeter[ripngd]	Service metering; RIP daemon used in IPv6
2604	nsc-ccs[ospfd]	NSC CCS; Open Short Path First Daemon (ospfd)
2605	nsc-posa	NSC POSA; Boundary Network Protocol Daemon (bgpd)
2606	netmon[ospf6d]	Dell Netmon; OSPF daemon for IPv6 (ospf6d)
2809	corbaloc	Public Object Request Agency (CORBA) Naming Service Locator
3130	icpv2	Internet Cache Protocol Version 2 (v2); used by Squid proxy cache server
3306	mysql	MySQL database service
3346	trnsprntproxy	Trnsprnt proxy
4011	pxe	Pre-execution environment (PXE) service
4321	rwhois	Remote Whois (rwhois) service
4444	krb524	Kerberos version 5 (v5) to version 4 (v4) ticket converter
5002	rfe	Radio Frequency-free Ethernet (RFE) audio broadcasting system
5308	cfengine	Configuration Engine (Cfengine)
5999	cvsup[CVSup]	CVSup file transfer and update tool
6000	x11[X]	X Window System Service
7000	afs3-fileserver	Andrew File System (AFS) File Server
7001	afs3-callback	AFS port used to call back the cache manager
7002	afs3-prserver	AFS user and group database
7003	afs3-vlserver	AFS file volume location database
7004	afs3-kaserver	AFS Kerberos Verification Service
7005	afs3-volser	AFS file volume management server
7006	afs3-errors	AFS Error Interpretation Service
7007	afs3-bos	AFS basic monitoring process
7008	afs3-update	AFS server to server updater
7009	afs3-rmtsys	AFS Remote Cache Manager Service
9876	sd	Session Guide
10080	amanda	Advanced Maryland Automatic Network Disk Archiver (Amanda) Backup Service
11371	pgpkeyserver	Good Privacy (PGP)/GNU Privacy Guard (GPG) Public Key Server
11720	h323callsigalt	H.323 call signal alternating
13720	bprd	Veritas NetBackup request daemon (bprd)
13721	bpdbm	Veritas NetBackup Database Manager (bpdbm)
13722	bpjava-msvc	Veritas NetBackup Java/Microsoft Visual C++ (MSVC) protocol
13724	vnetd	Veritas Network Tools
13782	bpcd	Vertias NetBackup
13783	vopied	Veritas VOPIED protocol
22273	wnn6[wnn4]	Kanna/Chinese Character Conversion System
26000	quake	Quake (and related) multiplayer server
26208	wnn6-ds
33434	traceroute	Traceroute Network Tracking Tool
Note: The comments in /etc/services are as follows: Port 1236 is registered as "bvcontrol", but it is also used by the Gracilis Packeten remote configuration server. The official name is listed as the primary name, and the unregistered name is listed as an alias. Note in /etc/services: Ports 2600 to 2606 are used by the zebra package without registration. The main name is the registered name, and the unregistered name used by zebra is listed as an alias. Comments in /etc/services file: This port is registered as wnn6, but the unregistered "wnn4" is also used in the FreeWnn package.

Datagram Delivery Protocol Ports (displays a list of ports related to Datagram Delivery Protocol (DDP). DDP is used on AppleTalk networks)

Port number/layer	name	Comments
1/ddp	rtmp	Router table management protocol
2/ddp	nbp	Name binding protocol
4/ddp	echo	AppleTalk Echo protocol
6/ddp	zip	Block Information Protocol

Kerberos (engineering Athena/MIT) ports (the list of ports related to the Kerberos network verification protocol is marked in the place where v5 represents the Kerberos version 5 protocol, and these ports are not registered in IANA)

Port number/layer	name	Comments
751	kerberos_master	Kerberos Verification
752	passwd_server	Kerberos password (kpasswd) server
754	krb5_prop	Kerberos v5 slave propagation
760	krbupdate[kreg]	Kerberos registration
1109	kpop	Kerberos Post Office Agreement (KPOP)
2053	knetd	Kerberos demultiplexer
2105	eklogin	Kerberos v5 encrypted remote login (rlogin)

Unregistered ports (these ports may be used by services or protocols installed on your Red Hat Enterprise Linux system, or they are required for communications on Red Hat Enterprise Linux and machines running other operating systems)

Port number/layer	name	Comments
15/tcp	netstat	Network status (netstat)
98/tcp	linuxconf	Linuxconf Linux Management Tools
106	poppassd	Post Office Protocol Password Change Daemon (POPPASSD)
465/tcp	smtps	Simple Mail Transfer Protocol (SMTPS) via Secure Sockets Layer
616/tcp	gii	Interactive interface using gateway (routing daemon)
808	omirr[omirrd]	Online mirroring (Omirr) file mirroring service
871/tcp	supfileserv	Software Upgrade Protocol (SUP) Server
901/tcp	swat	Samba World Wide Web Management Tool (SWAT)
953	rndc	Berkeley Internet Name Domain Version 9 (BIND 9) Remote Name Daemon Configuration Tool
1127	sufiledbg	Software Upgrade Protocol (SUP) Debugging
1178/tcp	skkserv	Simple Kanana to Chinese Characters (SKK) Japanese input server
1313/tcp	xtel	French Minitel Text Information System
1529/tcp	support[prmsd,gnatsd]	GNATS Error Tracking System
2003/tcp	cfinger	GNU Finger Services
2150	ninstall	Network installation service
2988	afbackup	afbackup client-server backup system
3128/tcp	squid	Squid Web proxy cache
3455	prsvp	RSVP Port
5432	postgres	PostgreSQL database
4557/tcp	fax	FAX Transfer Service (Old Service)
4559/tcp	hylafax	HylaFAX Client-Server Protocol (New Service)
5232	sgi-dgl	SGI distributed graphics library
5354	noclog	NOCOL Network Operation Center Record Daemon (noclogd)
5355	hostmon	NOCOL Network Operation Center Host Monitoring
5680/tcp	canna	Canna Japanese character input interface
6010/tcp	x11-ssh-offset	Secure Shell (SSH) X11 Forward Offset
6667	ircd	Internet Relay Chat Daemon (ircd)
7100/tcp	xfs	X Font Server (XFS)
7666/tcp	tircproxy	Tircproxy IRC proxy service
8008	http-alt	Another option for Hypertext Transfer Protocol (HTTP)
8080	webcache	World Wide Web (WWW) Cache Service
8081	tproxy	Transparent Agent
9100/tcp	jetdirect[laserjet,hplj]	Hewlett-Packard(HP)JetDirect Network Printing Service
9359	mandelspawn[mandelbrot]	Parallel Mandelbrot Generator for X-Window System
10081	kamanda	Amanda Backup Service with Kerberos
10082/tcp	amandaidx	Amanda Backup Service
10083/tcp	amidxtape	Amanda Backup Service
20011	isdnlog	Comprehensive Service Digital Network (ISDN) login system
20012	vboxd	ISDN speaker daemon (vboxd)
22305/tcp	wnn4_Kr	kWnn Korean input system
22289/tcp	wnn4_Cn	cWnn Chinese input system
22321/tcp	wnn4_Tw	tWnn Chinese input system (Taiwan)
24554	binkp	Binkley TCP/IP Fidonet Mailing Daemon
27374	asp	Address Search Protocol
60177	tfido	Ifmail FidoNet compatible mailing service
60179	fido	FidoNet Email and News Network