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Password Action Documentation

You can acquisition RIT’s offical countersign action here.

You can go to https://knockknock.cs.rit.edu/ to change or displace your DCS password. You can accredit with your DCS countersign to change it with the aboriginal blooming button.

If you do not bethink your DCS password, a student can accredit with their RIT username/password with the added blooming button.

The folio you are directed to will acquiesce you to change your DCS countersign to one that fulfills all of the countersign requirements. Back the “update password” button turns blooming you acquire accomplished the adapted adversity and you may set your DCS password.

Any problems or questions you acquire can be beatific to [email protected]

At this time the Administration of Computer Science requires you countersign to be:

Remote Connections

Using PuTTY

PuTTY is a chargeless SSH applicant accessible from http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html From that folio you can download either aloof the putty.exe affairs or a abounding set of SSH utilities including book alteration and key generation. Agenda that PuTTYtel will not assignment to affix to the CS department, as we do not abutment telnet connections.

When you barrage the PuTTY.exe program, it shows a agreement awning with abounding options. However, best of them can be larboard at their defaults. To affix to a CS administration computer, admission the absolutely able area name (example: newyork.cs.rit.edu) in the argument box labeled “Host Name (or IP address)”. You can afresh bang the “Open” button to connect. The aboriginal time you affix to a host, it will affectation a aegis alert. You can usually bang “Yes” and it will bethink the host key and not alert the abutting time you affix (see beneath for added details). Afterwards it connects, it will alert for your username and password.

When abutting to a host for the aboriginal time or for the aboriginal time afterwards a host’s SSH keys (these are not your claimed keys, but the keypair that identifies a accurate computer system) acquire been rebuilt, you will be prompted with a bulletin agnate to:

The server’s host key is not buried in the registry. You acquire no agreement that the server is the computer you anticipate it is. The server’s rsa2 key fingerprint is: ssh-rsa 1024 03:90:56:97:64:e4:e3:24:12:ed:f8:a8:7e:04:1f:46 If you assurance this host, hit Yes to add the key to PuTTY’s accumulation and backpack on connecting. If you appetite to backpack on abutting aloof once, afterwards abacus the key to the cache, hit No. If you do not assurance this host, hit Cancel to carelessness the connection.

In accepted it is altogether safe to hit Yes at this prompt. If you apperceive the SSH keys on a host acquire not afflicted (this is best applicative to users active Unix at home) but you are actuality prompted with a bulletin agnate to the above, amuse acquaintance the Admins immediately.

To abstain accepting to blazon in a host and your user name every time, you can save the settings as a session. To do so, admission in a host name and set any added settings (such as username beneath the “Connection/Data” category), afresh admission a name beneath “Saved Sessions” (in the capital “Session” category) and columnist “Save”. From afresh on, you can artlessly double-click the affair name in the annual to affix to that machine. You can use the “Load” button to accompany up the settings in adjustment to change them and afresh save them afresh beneath the aforementioned name or a new one.

PuTTY additionally comes with a affairs called PuTTYgen to accomplish SSH accessible and clandestine keys. You can use these keys to accredit instead of application your password.

Using SSH/SCP/SFTP

This is not a adviser on how to use SSH/SCP/SFTP or any mail or annual programs. There are far too abounding programs to abode a absolute adviser on each. Instead, this will serve as a accepted acceptance and agreement album for the programs best readily accessible in the Administration of Computer Science at R.I.T. All systems in the Computer Science Administration are configured to use SSH2 only. There are a cardinal of well-documented aegis vulnerabilities of SSH1 that SSH2 is allowed to, so fallback to SSH1 has additionally been disabled.

Valid machines for accepted use are all apprentice labs (ICLs 1-4) and the accepted admission SMPs. Back you are in a lab you will see name tags on anniversary system; artlessly adjoin ‘.cs.rit.edu’ to the name for the fully-qualified DNS name. For example, the host idaho is absolutely idaho.cs.rit.edu.

One apparatus not in labs that is a accurate affiliation point is glados. This is a beyond arrangement accessible for accepted accretion use, active in the Computer Science apparatus room.

When abutting to a host for the aboriginal time or for the aboriginal time afterwards a host’s SSH keys (these are not your claimed keys, but the keypair that identifies a accurate computer system) acquire been rebuilt, you will be prompted with a bulletin agnate to:

The actuality of host ‘{hostname} ({host IP address})’ can’t be established.RSA key fingerprint is 03:90:56:97:64:e4:e3:24:12:ed:f8:a8:7e:04:1f:46.Are you abiding you appetite to abide abutting (yes/no)?

In accepted it is altogether safe to acquire this prompt. If you apperceive the SSH keys on a host acquire not afflicted (this is best applicative to users active Unix at home) but you are actuality prompted with a bulletin agnate to the above, amuse acquaintance the Admins immediately.

SSH supports assorted user affidavit techniques. The two active by the CS administration are password-based and public/private key-based.

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This is the absence technique; artlessly chase the admonition for abutting to a CS host below. Back connecting, you will be prompted for your password.

This abode requires the architecture and administration of SSH keys.

Note that this adjustment is about not accessible for Windows systems. The countersign affidavit abode is sufficient.

The command ssh-keygen should already be in your path.

The absence behavior of the SSH key architect is to body 1024-bit RSA keys for SSH verison 2.

Building & Application SSH Keys

$> ssh-keygen -b [1024 | 2048] -t rsa {enter}

When prompted for a passphrase, it is important that you not leave this blank. It is additionally best to not accomplish this passphrase the aforementioned as your password. Application your countersign as the key passphrase is about identical to application countersign authentication.

This will actualize a book brace ~/.ssh/id_rsa and ~/.ssh/id_rsa.pub. The id_rsa.pub book is your accessible key, the book afterwards the extention is your clandestine key.

$> ssh-keygen -b [1024 | 2048] -t dsa {enter}

When prompted for a passphrase, it is important that you not leave this blank. It is additionally best to not accomplish this passphrase the aforementioned as your password. Application your countersign as the key passphrase is about identical to application countersign authentication. For simplicities sake, this can be the aforementioned as your RSA keypair, but added aegis is acquired (in the faculty that for abounding accommodation of your keypairs it would crave able two passphrases, not aloof one) by authoritative the two passphrases different.

This will actualize a book brace ~/.ssh/id_dsa and ~/.ssh/id_dsa.pub. The id_dsa.pub book is your accessible key, the book afterwards the extention is your clandestine key.

When you administer keypairs accumulate these credibility in mind:

Now back application SSH you will not be prompted for your countersign but rather the passphrase you entered back breeding the keys. This can be added simplified by application SSH agents. Depending on the affidavit adjustment called by the SSH handshake process, this is application either RSA or DSA keys; if your passphrase is altered for anniversary keypair, this will matter. SSH will absence to RSA keys first, and afresh affective to DSA keys.  For added on this, see the Resources section.

So, Instead of My Countersign I Acquire a Passphrase — Why Bother?

This point could be argued either way, but conceivably the best adapted point is break of authority. If one countersign is acclimated everywhere, this is a distinct point of failure. If you use a countersign or added passphrase to log assimilate the CS systems, and afresh a altered passphrase to move amid the administration (this book as follows: abutting to the CS administration from home with SSH keypair A or via countersign authentication, and application SSH keypair B aural the department), this is two levels of security.

Accepted Notes on Authentication

Keys are the prefered adjustment of authentication. As mentioned above, RSA keys are aboriginal tried, afresh DSA keys. If keys are non-existant or abort affidavit (incorrect passphrase, etc), password-based affidavit is used.

Provided you acquire a CS account, from a Unix carapace admission either of the afterward commands at a carapace prompt:

$> ssh {username}@{machine name} {enter}

or

$> ssh -l {username} {machine name} {enter} 

where {machine name} is either a absolutely able DNS name (eg. tin.cs.rit.edu) if you’re abutting from alfresco the department, or aloof the hostname (eg. tin) if you’re abutting from within.

If you’re abutting two systems on which you acquire the aforementioned username, (ie, amid two CS systems) you may ommit the {username} field; it defaults to the username you are currently using.

Use the absence SSH anchorage (TCP anchorage 22) back connecting.

This abode works appropriately able-bodied for any added Solaris, Linux, or added Unix alternative Operating System.

Prerequisites:

Configure your applicant to affix application your CS username to a accurate CS Administration host. As with the Unix variants, your host blueprint is either a absolutely able DNS name (eg newyork.cs.rit.edu) if you’re abutting from alfresco the department, or aloof the hostname (eg newyork) if you’re abutting from within.

Use the absence SSH anchorage (TCP anchorage 22) back abutting (there may be an advantage to change this value; leave it as is).

The aloft articles will accommodate a defended shell, which does not admittance assorted windows (eg, you won’t be able to alpha emacs and advance your carapace window). If this is a adorable affection you will charge to acquire an X Server active on your bounded machine. Amuse analysis out these How Tos:

Also note:

These programs accomplish as a subset of the SSH package, and accordingly are belted to the hosts and protocols as mentioned above.

One Important Caveat About SCP and SFTP:

If boundless advice is echoed to the terminal during login (from the .login or .bashrc/.cshrc files), these two programs will not work. RationalRose, as acclimated in CS4 and CS for Alteration classes, additionally causes these programs to abort as they answer advice to the terminal window.

Simply commenting out the adapted curve in these files will acquiesce SCP and SFTP to accomplish cleanly.

In your .cshrc or .bash_profile file, a band agnate to:

source /usr/local/RationalRose/rs_setup.csh

exists; inserting a batter assurance (#) afore this band will animadversion it out and anticipate its execution.

scp works like the unix ‘cp’ command, except it copies from amid hosts.A simple syntax (man scp for added options):

scp [ [[email protected]]host1:]file1 []… [ [[email protected]]host2:]file2

If user or host is omitted, it assumes your userid and bounded host.example:

scp file1 [email protected]:/full-path-to-home/file2

This will archetype file1 from your accepted apparatus and agenda to /full-path-to-home/file2 through the apparatus holly. You will be adapted to accredit as username for the action to succeed.

SFTP works the aforementioned as acceptable ftp, except over a defended connection. To use it, aloof affix to any of the lab machines.Example:

sftp newyork.cs.rit.edu

After authenticating, you will be affiliated to your home directory. See the man folio for sftp for added details.

Using ssh-agent can abundantly admission automation back alive on a broadcast activity while continuing to be secure. It allows you to use a passphrase adequate ssh generated key afterwards accepting to blazon in the countersign anniversary time. This is done by starting a action that will act as a countersign proxy for your accepted carapace session. This action is abstracted from the carapace you adjure it from: it will be important that you annihilate that action afore you abutting the shell. Otherwise, you will leave orphaned ssh-agent processes behindTo get ssh-agent to assignment for you, you charge already acquire ssh keys generated (see Application Public/Private Keys for Affidavit ).

Using X11 with O S X

How to intall X11 depends on what adaptation of OS X you acquire installed:

Recent versions of OS X will automatically barrage X11 back a affairs attempts to affix to the X server. Accessible Terminal.app and try active xterm. If that doesn’t work, you’ll charge to alpha X11 manually. It can be begin in /Applications/Utilities.

Using the Terminal or an xterm, use ssh -Y [email protected] to affix to a CS machine. Already logged in, you may use programs as normal. For archetype active emacs should accessible the emacs window on your computer.

Before activity any further, you should acquire downloaded Adjustable already. Documentation on accepting Adjustable is accessible here.

Mail

pine/alpine with IMAP

pine is accessible on the Solaris machines.alpine is the backup mail apparatus and currently is alone begin on the Ubuntu machines.

/var/mail is NFS army on the Solaris machines, which allows ache to apprehend your inbox afterwards the charge for IMAP. This functionality is activity to go abroad as the Solaris machines are phased out. There are no affairs to arise /var/mail from the Ubuntu machines which is why you will charge to set aerial up to apprehend mail through IMAP

Once you alpha alpine, at the capital awning hit ‘S’ afresh ‘C'(S) Bureaucracy -> (C) Config::

User Area = cs.rit.eduSMTP Server (for sending) = mailhost.cs.rit.edu:587/tlsInbox Aisle = {mailhost.cs.rit.edu/user=username/ssl/IMAP}INBOX

where username is your CS username, ie. abc1234

choose ‘E’ to avenue bureaucracy and affirm the changes.

To apprehend your inbox blazon in your CS countersign at the promt. Afresh ‘L’ Binder Annual -> ‘M’ Mail -> INBOX

Procmail-forwarding email and spam filtering

procmail can be acclimated to clarify and advanced your cs email. By absence new acceptance acquire their cs accounts set up with procmail to advanced email to [email protected]

to use procmail, you aboriginal charge to

|/usr/local/bin/qmail-procmail

#=====================# # Clarify out the spam # #=====================# :0: * ^X-Spam-Status: Yes /your-home-path/mail/caughtspam

That simple archetype will clarify any mail that the arrangement tags as spam and put it into your ~/mail/caughtspam file.

procmail will action your .procmailrc book until it finds a analogous aphorism and afresh avenue afterwards afterward that rule. If procmail does not acquisition a analogous aphorism by the end of the file, the bulletin will be put into your cs mail folder. So, if what you appetite to do is accelerate all of your mail about else, you could advanced it at the end of your .procmailrc

If you appetite to advanced your mail to addition armpit you can add the afterward curve to the end of your ~/.procmailrc file:

:0 ! [email protected]

Don’t balloon to acquire your .qmail book action mail through procmail:

|/usr/local/bin/qmail-procmail

This is a actual simple procmail set up, but you can get added advice from the afterward resources:

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