gweepnet online help : secure shell (SSH)
What is SSH?
SSH is a telnet-like replacement which does not pass your password in an
unencrypted form when you log in. This prevents would-be crackers from
obtaining your password by "sniffing the wire" when you log in. An added
benefit is that SSH sessions are encrypted, so it is very difficult for
someone to eavesdrop on your connection. For more information, please see the
(or see the list of mirrors).
As of July 24 2001, you now must use ssh for
interactive access. Telnet has been disabled and will not be
re-enabled. The quickest way to get logged in is to use the Mindterm
java applet. Go to
What is SCP?
SCP is a utility for securely copying files over networks. It uses a
similar authentication/encryption mechanism as SSH, and in fact the two
tools are often packaged together.
It is recommended (and now required on gweep.net) that you use SCP instead
of FTP to, for example, upload files to your home directory or public_html
directory. Both the password and the data sent using SCP
are encrypted. FTP, like telnet, sends password and data with no
encryption, which creates a potential for a malicious individual to get your
As of January 28, 2001, you now must use scp to
transfer files. FTP has been disabled and will not be re-enabled.
Why does any of this matter? I can handle the risk of someone stealing
Consider that gweep.net provides accounts for close to 300 people and
organizations. If your
account is compromised, this creates a security situation for everyone with
an account on gweep.net. Our policies are in place to protect you as an
individual and gweep.net as a whole.
The firewall at my workplace (or coffeshop wifi or ...) is blocking
Send email to system and we can help you sort out if there's any hope.
Where to get SSH/SCP clients?
FreeBSD, Linux, other Unix
- ssh.com has a nice looking
Windows client, which is finally available for free for non-commercial
use. This includes ssh terminal support as well as file transfer!
Look for SSHWinClient-x.x.x.exe, where x.x.x is a version number. 3.2.0
was current in August 2002. Get it from
- Tera Term + TTSSH
is a free SSH V1.5 client for Windows 95/98/NT. Be sure you download
Tera Term and TTSSH and follow the installation instructions. This
solution is ssh only (no scp).
is another free SSH client that also happens to include SCP. PuTTY is
also one of the few free clients to support V2 SSH (better protection
against some types of exploits).
- Secure iXplorer is a free
GUI-based scp client for Windows. It uses PuTTY's PSCP program under the
hood, but provides a drag-n-drop file copy capability. There is also a
is a WSFTP-like GUI-based SCP client that seems to work well.
ssh/scp command-line tools for Win32. Convenient for copying files
via the command line.
- Datafellows has commercial
V2 clients and servers for Windows.
- VanDyke Technologies also has
commercial V1,V2, and SFTP clients and servers for Windows.
- Also, if you are ever stuck somewhere and can't install software but
you have a Java-enabled web browser, you can
log in using the Java SSH
client. This is implemented using a cool bit of Java from
OS X (all versions)
- The cli ssh client is standard in all versions.
Niftyssh is a free SSH V1.5 client for Macs.
- MacSSH is a free SSH V2 client