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A-42 Cisco 2500 Series Access Server User Guide
Modems
Line security options
The login tacacs command allows for centralized and enhanced security with a Terminal
Access Controller Access System (TACACS) server.
Use one of the login line subcommands from Table A-7 to control access to your EXEC
session.
Table A-7 Login Line Subcommand Options
Configure security as follows:
Router(config)#username meredith password 123xyz
Router(config)#line 1 8
Router(config-line)#login local
With this configuration, the sign-on dialog from the remote PC appears as follows:
atdt5551234
CONNECT 14400/ARQ/V32/LAPM/V42BIS
User Access Verification
Username: meredith
Password:
Router>
1. See the publication Access and Communication Server Configuration Guide to set up TACACS support.
Line subcommand Security Prompts Function
no login None No security
login Password: Check the line subcommand password
login local Username:
Password:
Check the global username/password database
in configuration mode
login tacacs Username:
Password:
Check the TACACS server
1
- About This Guide 1
- Document Organization 2
- Document Conventions 3
- Safety Warnings.” 4
- Overview of the Cisco 2500 5
- Access Server Services 7
- System Specifications 8
- System Specifications 10
- 2500 Series Access Server 11
- Safety Recommendations 12
- General Site Requirements 13
- Site Environment 14
- Preventive Site Configuration 14
- Power Supply Considerations 15
- Installation Checklist 16
- Creating a Site Log 17
- Cabling Considerations 17
- Distance Limitations 18
- Console Port Connections 20
- Auxiliary Port Connections 20
- Ethernet Connections 20
- • Slide latch connectors 21
- • Jackscrew connectors 21
- Inspecting the System 22
- • Warranty pack 23
- Access Server 25
- Required Tools and Parts 26
- Installing the Rubber Feet 27
- Rack-Mounting the Chassis 28
- 19-Inch Rack 29
- Telco Rack 30
- Wall-Mounting the Chassis 31
- Vertical 32
- Power supply 32
- Connecting to the Network 33
- RJ-45 to DB-25 adapter 36
- Connector plugged into the 36
- Access server 36
- Modem or terminal 36
- AUX SER 0 ETH 39
- Configuring the Cisco 2500 41
- Additional Publications 42
- Contacting Customer Service 42
- • WWW: http://www.cisco.com 43
- • Telnet: cio.cisco.com 43
- • Chassis serial number 43
- • Maintenance contract number 43
- • Phone: 32 2 778 42 42 44
- • Fax: 32 2 778 43 00 44
- • E-mail: [email protected] 44
- Configuring the Access Server 45
- Router> enable 46
- Configuring the Access Server 47
- Checking Your Settings 57
- Internetworking Primer 59
- • Internal memory components 60
- • Command modes 60
- • Configuration files 60
- ROM Monitor 62
- Boot ROM 62
- Cisco IOS 63
- Command Modes 63
- EXEC Modes 64
- User EXEC Mode 64
- Privileged EXEC Mode 64
- Configuration Mode 65
- Configuration Files 66
- LANs and WANs 67
- LAN Technologies 69
- Ethernet LANs 70
- Configuring Ethernet 70
- Token Ring LANs 70
- Configuring Token Ring 71
- LAN Addressing 71
- WAN Technologies 72
- WAN Physical Layer (Layer 1) 73
- Master Clock Timing 73
- WAN Data Link Layer 74
- Point-to-Point WANs 75
- High-Level Data Link Control 75
- Point-to-Point Protocol 76
- Multipoint WAN Technologies 76
- • Fully meshed topology 77
- • Partially meshed topology 77
- Desktop Protocols 78
- Routed Protocol Design Goals 79
- Routing Protocols 81
- Internet Protocol 82
- IP Network Numbering 83
- IP Node Numbering 84
- IP Routing Protocols 84
- IP Directory Services 85
- IP Configuration Example 85
- IPX Protocol 86
- • IPX RIP 87
- • IPX enhanced IGRP 87
- • Novell Link State Protocol 87
- IPX Directory Services 88
- IPX Data Link Encapsulations 88
- AppleTalk Protocol 89
- AppleTalk Network Numbering 90
- AppleTalk Node Numbering 91
- AppleTalk Routing Protocols 92
- AppleTalk Directory Services 92
- • Configuring the Modem 95
- • Data transfer (TX/RX) 96
- • Modem control (DTR/DCD) 96
- Data Transfer (TX/RX) 97
- Modem Control (DTR/DCD) 98
- Configuring the Line 99
- Security Commands 99
- Global commands 99
- Line security options 100
- Communicating with the Modem 101
- Testing the Modem Connection 102
- Configuring the Modem 103
- Locking EIA/TIA-232 Speed 104
- Correct DCD Operation 104
- Other Modem Settings 105
- Best error correction 105
- Best data compression 105
- Answering calls 105
- Proper DTR Interpretation 105
- Initializing the Modem 106
- Asynchronous Protocols 107
- The EXEC Session 108
- Launching Autoselect 108
- Configuring Asynchronous Ports 109
- Modem Configuration 110
- Configuring PPP, SLIP, and ARA 110
- Serial Line Internet Protocol 112
- Configuration Example 113
- Maintaining the Cisco 2500 115
- Series Access Server 115
- Opening the Chassis 116
- Screw Slot 117
- Flat-blade screwdriver 117
- CODE 1 CODE 0 118
- • Two boot PROMs 119
- Upgrading the Boot PROMs 120
- • ESD-preventive wrist strap 122
- Replacing System-Code SIMMs 124
- Closing the Chassis 126
- Replacing the Cover 127
- > o/r 0x042 129
- Press RETURN to get started! 129
- • Recover a lost password 132
- • Enable or disable Break 132
- > b [tftp] flash filename 134
- Copying to Flash Memory 137
- Cable Specifications 139
- EIA/TIA-232 143
- EIA/TIA-449 146
- Token Ring Pinout 156
- Pin 1 and pin 8 161
- Translated Safety Warnings 163
- Jewelry Removal Warning 164
- Installation Warning 166
- TN Power Statement 166
- Circuit Breaker (15A) Warning 167
- SELV Circuit Warning 168
- Power Supply Warning 171
- Lightning Activity Warning 173
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