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-
- [@########L######O######U###############@]
- [L]xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx[L]
- [O]*Legions Of the Underground*********[O]
- [U]*FUN WITH THE ES-3810 AN ATM REALITY[U]
- ###*brought to you by optiklenz********###
- @########################################@
-
- --------------------------------------------------------------------------
- NAME: Steve Stakton a.k.a. <optiklenz>
- AFFILIATION: LOU- Legions Of the Underground
- GOAL: TO KNOW BOTH WHAT EVERYONE ELSE KNOWS, AND DOESN'T KNOW
- AGE: CAN YOU COUNT TO 24?
- HEIGHT: WHY DONT I JUST DRAW YOU A FULL SKETCH COMPOSITE FOR YOUR WANTED POSTERS?
- WHERE: ON THE ROAD
- DESTINATION: YET TO BE DECIDED
- INTEREST: PHONE SYSTEMS (WHO DOESN'T USE THE TERM
- COSMOS ON A DAY TO DAY BASIS), NETWORKS, ELECTRONICS, BEER,
- RIGGING THE LOCAL NMS TO BREED WITH THE NEIGHBORS PDN. SOUTH PARK,
- AND GIRLS WITH SLIGHT FACIAL HAIR
- TURN-OFFS: PEOPLE WHO THINK THEY KNOW THINGS THEY DONT, AND GIRLS
- WITH TO MUCH FACIAL HAIR.
- HANGOUTS: Narkotik Illusions, The Abyss & the Electronic Source BBS
- MUSIC GROUPs: Pink Floyd, and ICP, Rolling Stones (NO SECURITY!)
- WEB: http://www.legions.org, http://www.t00ned.org/optik/
- OS OF CHOICE: *BSD
- OS'S THAT SUCK: CALDERA, MACOS, AND THAT ONE OS MADE BY THAT BILL GUY.
- --------------------------------------------------------------------------
-
- "Get out and ride on, baby, ride on, baby
- Ride on, baby, ride on, baby
- I could pick your face out in an FBI file
- You may look pretty but I can't say the same
- for your mind" -Rolling Stones
-
-
- On with the show...
-
-
- First off there are some definitions, and Acronyms to be familiar with.
-
- AMI (ATM Management Interface) - The user interface to switching control
- software. AMI lets you monitor and change various operating configurations of
- switches and network module hardware and software, IP connectivity, and SNMP
- network management
-
- Bandwidth- usually identifies the capacity of data that can be sent through a given
- circuit; may be user-specified in a PVC.
-
- CBR (Constant Bit Rate)- A type of traffic that requires a continuous, specific
- amount of bandwidth over the ATM network (e.g., digital information such as video
- and digitized voice
-
- ANSI (American National Standards Institute)- A private organization that coordinates
- the setting and approval of some U.S standards. It also represents the U.S ISO
-
- BIP (Bit Interleaved Parity)- An error detection technique in which character bit patterns
- are forced into parity, so that the total number of one bits is always odd or even.
-
- DSR (Data Set Ready)- an RS-232 modem interface control signal (sent from the modem to the DTE
- on pin 6) which indicates that the modem is connected to the telephone circuit.
-
- DTE (Data Terminal Equipment)- generally user devices, such as terminals and computers that
- connect to data circuit terminating equipment. They either generate or capture data
- sent by the network
-
- ATDM (Asynchronous Time Division Multiplexing)- A method of sending information that
- resembles normal TDM, except that time slots are allocated as needed rather
- than prearranged to specific transmitters.
-
- EM- The CellPath 300 extension module; paired with the system controller and supporting
- an optional PCMCIA card.
-
- FDDI (Fiber distributed Data Interface)- High-speed data network that uses fiber-optic as
- the physical medium
-
- EPROM- Erasable Programmable Read Only Memory.
-
- CLP (Cell Loss Priority)- the last bit of byte four in an ATM cell header; indicates
- the eligibility of the cell for discard by the network under congested conditions.
-
-
- [Introductory to the Management Station
- ------------------*
-
- The ES-3810 is a switching architecture; it provides one with the ability to work with
- multiple switched Ethernet ports along with high performance ATM server and backbone connections
- to work with powerful network managing.
-
- The management console for the ES-3810 uses a menu based interface that utilizes
- A VT-100 terminal or VT-100 emulator like ProComm or PC Plus. The serial interface
- of the ES-3810 connects directly to either the DTE interface of the ASCII terminal or
- a serial port of the PC or workstation running terminal emulation.
-
- Note: If the NMM's SNMP-based management or IGMP support is going to be used, a console
- connection is required the first time the NMM is brought online since an IP address,
- subnet mask and possibly a gateway must be defined.
-
-
-
- [System Specs
- ------------------*
-
- Aggregate Throughput | 720,000 pps (packets per second)
- Latency | 61 ~s per 64-bp (byte packets)
- Filter/Forward Speed | 14,881pps
- Addresses/Port | 4 [workgroup]; 8,192 [segment]
- Buffering/Port | 256kb
- Media | UTP
-
-
- Print of settings an ES-3810
-
- ____________________________________________________________________________
- | |
- | ES-3810 Interface Configuration |
- |____________________________________________________________________________|
- | | |
- | Type: SEC-10b | Full Duplex: Disabled |
- | MAU: 10BaseT | Loopback: Disabled |
- | Number: 0 | Mode: Workgroup|
- |_____________________________________|______________________________________|
- |Media Configuration: Auto-Negotiation In Process |
- |____________________________________________________________________________|
- | | |
- | Link Detected: No | Forced Transmits: Disabled|
- | Link Polarity: Correct | VLAN Extension: n/a |
- | | Multicast Filtering: n/a |
- |_____________________________________|______________________________________|
- | | Transmitter: Enabled |
- | Receiver: Enabled | Transmit Buffer: Enabled |
- | Receive Buffer: Enabled | |
- |_____________________________________|______________________________________|
- | | |
- | Sniff Segment: Disabled | Transmit Sniffed Packets: Disabled|
- | Blocking: Disabled | Transmit Blocked Packets: Disabled|
- | Receive Errors: Disabled | Transmit Flagged Packets: Disabled|
- | Multicast Promiscuous: Disabled | Multicast Hash Upload: Disabled|
- | Individual Promiscuous: Disabled | |
- |_____________________________________|______________________________________|
- |lou%: ef cfg; do 6fde8000 |
-
-
- [VLAN Assignments
- ------------------------*
-
- VLANs are OSI Layer 2 [data link] multicast domains. VLAN membership is
- not necessarily tied to a physical proximity. The ES-3810 supports three
- criteria: MAC address based assignment to a VLAN, IP Multicast Group based
- assignment, and port base assignment.
-
- [MAC Address based and Port based VLANs
- ---------------------------------------*
-
- MAC address based VLAN assignments supersedes port based VLAN assignment.
- By adding an ATM module you can extend any VLAN into ATM by assigning a LEC
- (Lan Emulation Client) instance to the VLAN. A VLAN extended into ATM must
- be named with the same NAME and CASE as the ELAN for example, an ELAN called
- "Lab" exists and you want the station on ES-3810 port 16 to join it. On the
- #s-3810 you must create a VLAN called "Lab" (case sensitive) and assign port
- 16 to it. when asked to "configure a LEC" say yes. The ES-3810 will join
- (in proxy) the ELAN called "Lab" and allows the station port 16 communication
- rights.
-
-
- [IGMP Based VLANs
- ---------------------------------------*
- Some TCP/IP applications use IP multicasts to deliver data to many stations
- at once. How ever multicasting can cause problems because stations that are
- not interested in receiving multicast data to see it anyway. This causes
- Ethernet segment congestion and unnecessary interrupts on workstations.
- Filtering these multicasts via IGMP can reduce congestion and keep the network
- moving smoothly.
-
- IGMP is designed to add further granularity within a VLAN. If a station from two
- separate VLANS join the same IP multicast group; the IP multicast stream has to be
- sourced twice. The IP client of the ES-3810 is reachable from the first configured
- VLAN, independent of that VLANs name. Since, by default the first VLAN is called "default"
-
- [Routerless Network
- ------------------------*
-
- A routerless network is one in which the ES-3810 switches Ethernet attached host to ATM
- where high speed servers are found. Typically one or several of the following apply
-
- * Network has no VLAN-to-VLAN traffic requirement
- * Primary NOS is client/server based
- * Security is a MAJOR concern (trust me on this one)
- * Servers are on ATM for maximum performance
-
- Any network matching one or more of the above scenarios would benefit from a
- routerless network because clients from different VLANs can access the same
- server but not other VLANs
-
- [Centralized Routing Network
- ----------------------------*
-
- A centralized routing network is one in which the ES-3810 switches Ethernet
- attached host to ATM where high-speed servers and router interfaces are found.
- Typically the ES-3810 can be utilized in a network that meets one or more of
- the following criteria
-
-
- * Maintenance of relatively flat network
- * Some VLAN to VLAN connectivity
- * Some VLAN to VLAN packet level filtering/firewalling
- * Traffic is 80% local and 20% routed
- * Network could collapse into fewer subnets by switching to ATM
-
-
- [Exploiting TFTP/ES-3810
- ------------------------*
-
- Issuing the command line rs :/cd usr do _filter area_ off will disable POST recognition
- by other users. Another thing that can be done is gaining remote access this can only
- happen if TFTP is binded to the system, and on the same subnet as the ES-3810 system.
- (which it should be by default if utilized). Since there is no password authentication
- you can use tftp to access the systems password file. Although you have read access to
- the password file other flags, and restricted privileges keep you from deleting any
- critical data. Logs maybe? =] .. More will be written on ES-3810
- security features/insecurities when time permits.
-
-
- To fix this disable TFTP by issuing the following command
-
- lou% tftp dgram udp wait user /etc/tftpd tftpd -n
-
- Sources Cited:
-
- Fore Systems
-
-
-
- -optiklenz <optik@legions.org>
-
- -D A T A D E S I R E S T O B E F R E E-
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