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Linux

There are numerous graphical front ends to the various packages on Windows; regardless which
front-end you choose, you will need to configure the back-end part below.

Front ends

Back Ends

For write access to repositories on cdcvs, I am currently recommending that users use a kerberized ssh,
which comes stock with Fermi Linux, or has to be installed on some older Linuxes.

I recommend for your $HOME/.ssh/config:

  host *.fnal.gov
   GSSAPIAuthentication yes
   GSSAPIDelegateCredentials yes
  host cdcvs.fnal.gov
   ForwardX11 = no
   # ForwardAgent = yes # only if you're using ssh keys, and not kerberos
   GSSAPIAuthentication yes
   GSSAPIDelegateCredentials yes

And on some newer systems
   GSSAPITrustDNS yes

Also, make sure your kerberos tickets are forwardable:

  $ klist -f
  Ticket cache: FILE:/tmp/krb5cc_1733_m02jhk
  Default principal: mengel@FNAL.GOV

  Valid starting     Expires            Service principal
  06/10/11 09:51:47  06/11/11 11:51:46  krbtgt/FNAL.GOV@FNAL.GOV
    renew until 06/17/11 09:51:46, Flags: FRIA

Note the "F" in the Flags: section. If that isn't happening, check your
/etc/krb5.conf under libdefaults and appdefaults:

[libdefaults]
        ...
        forward = true
        forwardable = true
...
[appdefaults]
        kinit = {
                forwardable = true
                 ...

      pam = {
                debug = false
                forwardable = true

Check if it works:

try to login on the server with ssh:

ssh  echo hi

(where "project" is your project name). You should get

Only 'lscvs' and 'cvs' commands are allowed

CVS

Set CVS_RSH to /usr/bin/ssh in your environment.

export CVS_RSH=/usr/bin/ssh

or for tcsh/csh

setenv CVS_RSH /usr/bin/ssh

Subversion

Subversion just uses ssh automagically.

Git

Git just uses ssh automagically.