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SOCKS client version of telnet
rtelnet [-8] [-c] [-d] [-E] [-e escape_char]
[-L] [-N] [-n tracefile] [-P policy]
[-S tos] [host [port]]
Neutrino
- -8
- Allow an eight-bit input data path at all times. Without
this option, parity bits are stripped whenever the remote
side's stop and start characters are ^S and
^Q.
- -c
- Disables the reading of the user's .telnetrc file.
(See telnet for the
skiprc argument of the toggle telnet command.)
- -d
- Enable debugging by setting the initial value of the debug
toggle to TRUE.
- -E
- Disable the telnet escape character.
- -e escape_char
- Set the initial telnet escape character to
escape_char (default is
Ctrl-]). This
character lets you switch to rtelnet's command
mode.
- -L
- Specifies an 8-bit data path on output. This causes the BINARY
option to be negotiated on output.
- -N
- Numeric host address. Prevents look up of a symbolic name when the destination host
is given as an IP address.
- -n tracefile
- Record trace information in the specified file.
- -p policy
- Use the IPsec policy specification string policy for the connections.
For details of IPsec policy control, see the Library Reference.
- -S tos
- Sets the IP type-of-service (TOS) option for the telnet connection
to the value tos,
which can be a numeric TOS value or, on systems that support it,
a symbolic TOS name found in the
/etc/iptos file.
- host
- The official name, an alias, or the Internet address of
a remote host.
- port
- A port number (address of an application). If a number
isn't specified, the default telnet port is used.
The rftp
and rtelnet utilities provide the
well-known functionalities to hosts within a firewall.
Normally, when a firewall is constructed, IP-accessibility
across the firewall is cut off to reduce security risk to
hosts within the firewall. As a result, inside hosts can no
longer use many of the well-known tools directly to access
the resources outside the firewall.
|
For further information on all rtelnet functionalities, please refer
to telnet documentation. |
These utilities restore the convenience of the well-known
tools while maintaining the security requirement. Though the
utilities differ very much from their counterparts in the use
of the communication scheme, they should behave almost
indistinguishably to the users.
These are “versatile” clients — they can be used for
connections to inside hosts directly and to outside hosts
via SOCKS proxy servers. So they can be used as replacements
of their traditional counterparts.
When rtelnet starts, it prints to
stderr its version number and the name or IP
address of its default SOCKS proxy server. It then consults
the configuration file (/etc/socks.conf) to
determine whether a request should be allowed or denied
based on the requesting user, the destination host, and the
requested service.
For allowable requests, the configuration file also dictates
whether direct or proxy connection should be used to the
given destination, and optionally the actual SOCKS servers
to use for the proxy connection.
See /etc/socks.conf.
You can use the environment variable SOCKS_NS
to set the nameserver for domain name resolutions. Be sure
you use the IP address of the nameserver you want to use,
not its domain name. If SOCKS_NS
doesn't exist, the IP address defined by the symbol
SOCKS_DEFAULT_NS at compile time is used if
the programs were compiled with that symbol defined.
Otherwise, the nameservers specified in
/etc/nsswitch.conf
are used.
All the client processes log their activities using
syslog()
with facility daemon and level
notice.
In order to capture the log messages, you need to have
syslogd
running.
The rtelnet utility requires the libsocket.so
shared library.
- SOCKS_SERVER
- If defined, specifies the name or IP address of the
SOCKS proxy server host to use, overriding the default
server compiled into the programs.
- SOCKS_NS
- If defined, specifies the IP address of the domain
nameserver that should be used for name resolution,
overriding both the definition of symbol
SOCKS_DEFAULT_NS and the file
/etc/nsswitch.conf.
rftp,
syslogd,
telnet
syslog()
in the Library Reference
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