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-
- ==Phrack Magazine==
-
- Volume Four, Issue Forty-Four, File 22 of 27
-
- ****************************************************************************
-
-
- -- An Introduction to the DECserver 200 --
- by Opticon The Disassembled
-
-
- ANARCHY: "The belief that society
- can be maintained without prisons,
- armies, police or other organized force to
- maintain property rights, collect taxes or
- enforce such personal obligations as debts,
- contracts or alimony." -EB 1966, vol.I
- (taken from the Phrozen Realm)
-
-
- "If ur good, nobody knows that ur there"
-
- The DECserver is a terminal server (WOW!). The Model 200 is the most
- commonly found server in VMS machines. This device connects up to eight
- asynchronous (RS232C) terminals to one or more hosts available on an Ethernet
- Local Area Network.
-
- It is connected to the LAN through an Ethernet physical channel and
- supports speeds up to 19.200bps. It can be found on VAXes, mVAXes and
- VAXstations. It uses the Local Area Transport protocol to communicate with
- the other nodes. It also implements the Terminal Device/Session Management
- Protocol to achieve multiple sessions. Things that can be found plugged on
- it include dial-in and out modems, terminals, printers and stuff like that.
- The identification code for it in VMS is DS2. It's software is installed
- via VMSINSTAL.COM to SYS$SYSROOT:[DECSERVER] or in SYS$COMMON:[DECSERVER]
- for the cluster machines. And of course now you will ask why should you
- be interested in a damn phucking (=relief, back to my native language) SERVER.
- A lot of interesting things can be done, like dialing out for free (assuming
- you can connect to it in a convenient way). You can even find a DEC server
- 200 dedicated to eight high speed modems. There is no need to say that you
- need privileges to phuck up with devices like that...or there is?
-
- ..Set Default to SYS$SYSROOT:[DECSERVER] and run DSVCONFIG.COM :
-
- $
- $ set default sys$sysroot:[decserver]
- $ show default
- SYS$SYSROOT:[DECSERVER]
- = SYS$SYSROOT:[DECSERVER]
- = SYS$COMMON:[DECSERVER]
- $ @dsvconfig
-
- You must assign a unique DECnet node name and DECnet node
- address for each new DECserver.
-
- Press <RET> to start, or <CTRL/Z> to exit...
-
- D E C s e r v e r C o n f i g u r a t i o n P r o c e d u r e
-
- Version: V1.7
-
- Menu of Options
-
- 1 - List known DECservers
- 2 - Add a DECserver
- 3 - Swap an existing DECserver
- 4 - Delete an existing DECserver
- 5 - Restore existing DECservers
- CTRL/Z - Exit from this procedure
-
- Your selection? 1
-
- DECnet DECnet Server Service
- Address Name Type Circuit Ethernet Address Load File Dump File
- ------- ------ ----- ------- ----------------- ------------- -------------
- 1.1 KEYWAY DS200 BNA-0 08-00-2B-07-39-5E PR0801ENG.SYS DS2KEYWAY.DMP
- 1.2 REVEAL DS200 BNA-0 08-00-2B-28-32-CB PR0801ENG.SYS DS2REVEAL.DMP
- 1.3 OASIS DS200 BNA-0 08-00-2B-26-A9-57 PR0801ENG.SYS DS2OASIS.DMP
- 1.4 PAWN DS200 BNA-0 08-00-2B-24-F3-98 PR0801ENG.SYS DS2PAWN.DMP
- 1.5 OPAQUE DS200 BNA-0 08-00-2B-11-EA-D4 PR0801ENG.SYS DS2OPAQUE.DMP
- 1.6 TOKEN DS200 BNA-0 08-00-2B-10-64-98 PR0801ENG.SYS DS2TOKEN.DMP
- 1.7 KERNEL DS200 BNA-0 08-00-2B-12-D6-39 PR0801ENG.SYS DS2KERNEL.DMP
- 1.8 IRIS DS200 BNA-0 08-00-2B-12-D6-39 PR0801ENG.SYS DS2IRIS.DMP
- 1.9 NEBULA DS200 BNA-0 08-00-2B-12-D6-39 PR0801ENG.SYS DS2NEBULA.DMP
-
- Total of 9 DECservers defined.
- (Press RETURN for menu)
-
- Connecting to one of them:
-
- $ mc ncp connect node iris
-
- Console connected (press CTRL/D when finished)
- #
-
-
- Here you must give a password. The default one is usually working so try
- "access". Only in "high security" systems they change the default password,
- because privileges are needed anyway to access the Network Control Program
- (which can be a possible subject for my next article). But since you are in
- using a system account (..privileged) you can change the current password if
- you find any good reason for doing so. More on that later.
-
- DECserver 200 Terminal Server V3.0 (BL33) - LAT V5.1
-
- Please type HELP if you need assistance
-
- Enter username> <type anything here it doesnt really matter>
-
-
- You are in.
-
- In the DECserver there are Permanent and Operational databases. The
- permanent database holds commands which affect the device permanently when
- you log out. In the Operational database whatever you do is temporary and
- takes effect only for the time you are logged in.
-
- Let's go on by trying to get the default privileged account which enables
- you to view various things and make changes other than the normal ones.
-
- Local> set privileged
- Password> system
-
- Again the default password should work.
-
- Local> show hosts
-
- Service Name Status Identification
-
- VMS 1 Connected Welcome to VAX/VMS V5.4-2
- MODEM Available Dial In And Out
- UNIX Available BSD
-
- Local> show nodes
-
- Node Name Status Identification
-
- VMS 1 Connected Welcome to VAX/VMS V5.4-2
- UNIX Reachable BSD
- IRIS Reachable
-
- Local> show services
-
- Service Name Status Identification
-
- VMS 1 Connected Welcome to VAX/VMS V5.4-2
- MODEM Available Dial In And Out
- UNIX Available BSD (RISC)
-
- Local> show users
-
- Port Username Status Service
-
- 1 anything Connected VMS
-
- Local> show sessions (it'll display YOUR sessions)
-
- Port 1: anything Local Mode Current Session: None
-
-
- ** Before proceeding lets have a better look at some Features DECserver 200
- has, needed to understand some interesting things which follow or even some
- things that were previously mentioned.
-
- Remote Console Facility (RCF) is a management tool which helps you to
- connect remotely to any server available via it's management port. This
- is not hardware, but a logical port although it still has the same
- characteristics physical ports have.
-
- There are Privileged, non-Privileged and Secured ports. These are
- variables you can define by the time you manage to get the privileged account.
- A privileged port accepts all server commands. You can perform tests, define
- server operations, maintain security and all that bullshit. If you don't
- understand it yet, this status is enabled with the SET PRIVILEGED command we
- have used previously.
-
- A non-Privileged port can only manage and use commands which affect the
- sessions that are currently connected to a host or node. This is the default
- status of course.
-
- A Secured port is something in between. Users can make use of a restricted
- command set to make changes which affect only the port they own ("Property
- is theft but theft is property too, Prounton." Pardon me if the translation
- was destructive to the original meaning of this phrase, and if I piss you off
- every time I start talking about things that are completely irrelevant
- to the grand scheme of things and everything my articles are SUPPOSED
- to deal with).
-
- Our little unit has 5 types of passwords and that will help you understand
- how important it is for the whole system.
-
- (1) A PRIVILEGED password is what you should be aware of by now. You can
- SET/DEFINE SERVER PRIVILEGED PASSWORD "string", to change it.
-
- (2) A LOGIN password prevents the use of the server by unauthorized
- users. This can be enabled for every port or for a single dial-in modem port.
- You must first specify the password for the entire server via SET/DEFINE
- SERVER LOGIN PASSWORD and then, enable or disable it depending on the needs
- of a specified port, via SET/DEFINE PORT x LOGIN PASSWORD ENABLED/DISABLED.
- This password takes effect when you try to login to a port. The prompt is
- a "#" sign, without the double quotes.
-
- (3) A MAINTENANCE password prevents unauthorized users from doing remote
- maintenance operations like the one we did after we ran DSVCONFIG.COM.
- "The DECnet service password corresponds to the server maintenance password
- and it is entirely unrelated with the DECserver 200 service password". In
- other words someone who wishes to modify a value in your server must give
- in the NCP> command line, a parameter which specifies your server's
- maintenance password. Of course if this password is set to null (0)
- no password is needed. Also "Digital Equipment Corporation recommends
- against storing the password in the DECnet database (as the DECnet service
- password) and it strongly suggests that you change the maintenance password
- from the default value of 0 to maintain adequate server security"
- ...tsk tsk tsk...
-
- (4) A SERVICE password protects a service or services defined on the
- server. You can increase or decrease the number of attempts before the server
- gives a message, informing that the connect has failed because of an invalid
- password, via SET/DEFINE SERVER PASSWORD LIMIT.
-
- (5) A LOCK password protects your current sessions and port from other
- unwanted human substances. The server accepts no input until you retype the
- password you used for locking it.
-
- Finally, a port may be available only for certain users or groups.
-
- ** As you can see, it can be really tough to break VMS' security if all the
- available measures are taken.
-
- Research for modems:
-
- Local> show port 8
-
- Port 8: Server: IRIS
-
- Character Size: 8 Input Speed: 19200
- Flow Control: XON Output Speed: 19200
- Parity: None Modem Control: Disabled
-
- Access: Local Local Switch: None
- Backwards Switch: None Name: PORT_8
- Break: Local Session Limit: 4
- Forwards Switch: None Type: Soft
-
- Preferred Service: None
-
- Authorized Groups: 0
- (Current) Groups: 0
-
- Enabled Characteristics:
-
- Autobaud, Autoprompt, Broadcast, Input Flow Control, Loss Notification,
- Message Codes, Output Flow Control, Verification
-
- Simple configuration, probably nothing or a terminal in there. What this
- screen says is that we have on server IRIS, on port 8, something with character
- size of 8, flow control XON (it could be CTS -hardware-), parity none, input
- speed 19200bps, output speed 19200bps and modem control disabled.
-
- All the other information have to do with the server and how it reacts to
- certain things. So if the preferred service was "VMS" and you were logging in
- through port 8, you would immediately connect to the VAX without having the
- server asking you where to log you to. The "break: Local" variable means that
- if you send a break character you will find yourself in the "Local>" prompt even
- if you have been working in the UNIX OS of the "UNIX" host and that lets you
- start multiple sessions. Quite useful. The forward and backward switches are
- for moving around your sessions. Everything can be modified.
-
- For more information concerning the parameters have a look at the command
- reference or the help utility.
-
- Local> show port 1
-
- Port 1: Server: IRIS
-
- Character Size: 8 Primary Speed: 9600
- Flow Control: CTS Alternate Speed: 2400
- Parity: None Modem Control: Enabled
-
- Access: Dynamic Local Switch: None
- Backwards Switch: None Name: MODEM_1
- Break: Local Session Limit: 4
- Forwards Switch: None Type: Soft
-
- Preferred Service: VMS
-
- Authorized Groups: 0
- (Current) Groups: 0
-
- Enabled Characteristics:
-
- Autobaud, Autoconnect, Autoprompt, Broadcast, Dialup, DTRwait,
- Inactivity Logout, Input Flow Control, Loss Notification,
- Message Codes, Output Flow Control, Ring, Security, Verification
-
-
- And that's, obviously, a modem. The speed, the modem control and the enabled
- characteristics will help you understand even if the name is not helping at
- all. Have a look at the "Alternative Speed" option.
-
- What to do now that you have find it?
-
- Local> set port 1 modem control disabled
- Local> set service modem port 1
- Local> connect modem
-
-
- Start programming. This way is a little bit awkward and of course there
- is a possibility that the modem is ALREADY defined as a dial-out modem. You
- are a privileged user, don't forget that. I would recommend not to harm the
- server ("nothing comes from violence and nothing ever good") and to leave
- things as u find them. DO NOT create a permanent dial-out modem service
- (which can be done directly from VMS if you really want to) and DO NOT
- forget that somebody has to pay for your calls and that the line which
- the modem uses, may be limited to certain numbers or even prevent out-dialing
- by hardware. Use your brains...And don't stick in the idea of researching
- modems. You can use a DECserver to infiltrate a system. Don't misuse those
- introductions.
-
- Overview of Commands (in alphabetical order)
-
- * BACKWARDS
- Goes back to a previous session.
- * BROADCAST
- Sends a message to a port.
- * CLEAR
- Clears a service. It belongs to the Operational Database.
- * CONNECT
- Connects to a service or port.
- * CRASH
- Shuts down the server and reinitializes it.
- * DEFINE
- Defines something. It belongs to the Permanent Database.
- * DISCONNECT
- Disconnects a session or port.
- * FORWARD
- Goes forward to a following session.
- * HELP
- Help.
- * INITIALIZE
- Reboots the server. You can specify a delay in minutes and
- "Local>initialize cancel" if you decide, finally, not to
- do it.
- * LIST
- Displays information on something; Devices,Nodes,Ports,Queue,
- Server, Services, Sessions...
- * LOCK
- Locks your terminal with a password you specify that moment.
- Retype your temporary password to continue.
- * LOGOUT
- Logs out the specified port. If none, your current port.
- * MONITOR
- Devices, Nodes, Ports, Queue, Server, Services, Sessions...
- * PURGE
- Purges a service from the Permanent database.
- * RESUME
- Resumes a session.
- * SET
- Devices, Nodes, Ports, Queue, Server, Services, Sessions,
- Characteristics,Privileged,NONprivileged...It belongs to the
- Operational database.
- * SHOW
- Everything.
- * TEST
- Tests a LOOP, PORT or SERVICE.
-
- An interesting Warning Message, just for informational purposes, is the
- following;
-
- " Local -120- WARNING - Access to service is not secure
-
- Session status information cannot be passed between the
- server and the attached device because modem signals are
- not present. This is not a problem if the device is a
- non-secure printer; however, if the port is a non-LAT
- host system, users could access other users' data. "
-
- That's all for now I think.
-
- There are many things to explain but there is no reason for doing that right
- now. If you need more information then just have a look at the HELP utility or
- contact me, somehow. [I hope you have not misunderstood my strange looking
- article because my native language is not English]
-
-
- " Opticon: Don't you think that I'm getting insane?
- TLA: Yeah, sure looks like it..."
-
- Love and An-archy to all those who know why.
-
- BREAK DOWN THE WALL
-
-