Host name syntax

Note: This special syntax is generally not used from the user interfaces of wc3270 or wx3270, except in scripts or at the x3270 prompt. Those user interfaces allow these options to be specified separately, and construct a properly-formatted host name from them.

Basic syntax
The basic syntax is:

[prefix:...]host[:port][=accept-name]

Prefixes
An optional prefix is a single letter and a colon character (:). Multiple prefixes can be specified. Prefixes are listed here.

Host
The host is either a fully-qualified domain name (e.g., ) or a numeric address in either IPv4 dotted-decimal or IPv6 hexadecimal format. A numeric IPv6 addres must be surrounded by square-bracket characters, e.g.,, to keep the colon characters from being misinterpreted.

Port
The optional port is a number separated from the host name by a colon. It overrides the default value of 23 (the TELNET port).

Accept name
The optional accept name is separated from the host and optional port by an equals sign (=). It overrides the value of the acceptHostname resource, specifying a name to match against the host's TLS certificate.

Examples
Connect to  without a TLS tunnel, on port 23. foo.bar.com Connect to  with a TLS tunnel but not verifying the host certificate, on port 9100. L:Y:foo.bar.com:9100 Connect to IPv4 address  on port 23. 1.2.3.4 Connect to IPv6 address  on port 23. [100:200::1] Connect to IPv6 address  on port 9100 with a TLS tunnel, using   to match the name from the host's TLS certificate. L:[100:200::1]:9100=myhost