3.4) What ports does SSL use?
Description
This article is from the Secure Sockets Layer Discussion List FAQ, by Shannon Appel SAppel@consensus.com with numerous contributions by others.
3.4) What ports does SSL use?
Theoretically SSL can transparently secure any TCP-based protocol
running on any port if both sides know the other side is using SSL.
However, in practice, separate port numbers have been reserved for
each protocol commonly secured by SSL -- this allows packet
filtering firewalls to allow such secure traffic through.
As of October 1998, SSL has the following port numbers reserved
with the Internet Assigned Numbers Authority (IANA), a part of the
Internet Engineering Task Force (IETF):
Keyword Decimal Description
------- ------- -----------
nsiiops 261/tcp IIOP Name Service over TLS/SSL
https 443/tcp http protocol over TLS/SSL
ddm-ssl 448/tcp DDM-SSL
smtps 465/tcp smtp protocol over TLS/SSL
nntps 563/tcp nntp protocol over TLS/SSL
sshell 614/tcp SSLshell
ldaps 636/tcp ldap protocol over TLS/SSL
ftps-data 989/tcp ftp protocol, data, over TLS/SSL
ftps 990/tcp ftp, control, over TLS/SSL
telnets 992/tcp telnet protocol over TLS/SSL
imaps 993/tcp imap4 protocol over TLS/SSL
ircs 994/tcp irc protocol over TLS/SSL
pop3s 995/tcp pop3 protocol over TLS/SSL
A listing of all IANA port assignments can currently be found at
<http://www.isi.edu/in-notes/iana/assignments/port-numbers>.
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