HP 4100GL Manuel d'utilisateur Page 217
- Page / 228
- Table des matières
- MARQUE LIVRES
Noté. / 5. Basé sur avis des utilisateurs
Using Authorized IP Managers
Building IP Masks
Figure 8-5. Analysis of IP Mask for Multiple-Station Entries
1st
Octet
2nd
Octet
3rd
Octet
4th
Octet
Manager-Level or Operator-Level Device Access
IP Mask 255 255 255 0 The “255” in the first three octets of the mask specify that only the exact
Authorized 10 28 227 125
value in the octet of the corresponding IP address is allowed. However,
Manager IP
the zero (0) in the 4th octet of the mask allows any value between 0 and
255 in that octet of the corresponding IP address. This mask allows switch
access to any device having an IP address of 10.28.227.xxx, where xxx is
any value from 0 to 255.
IP Mask 255 255 255 249 In this example (figure 8-6, below), the IP mask allows a group of up to 4
Authorized 10 28 227 125
management stations to access the switch. This is useful if the only
devices in the IP address group allowed by the mask are management
IP Address
stations. The “249” in the 4th octet means that bits 0 and 3 - 7 of the 4th
octet are fixed. Conversely, bits 1 and 2 of the 4th octet are variable. Any
value that matches the authorized IP address settings for the fixed bits is
allowed for the purposes of IP management station access to the switch.
Thus, any management station having an IP address of 10.28.227.
121
, 123,
125
, or 127 can access the switch.
4th Octet of IP Mask:
4th Octet of Authorized IP Address:
249
5
Bit Numbers Bit Bit Bit Bit Bit Bit Bit Bit
7 6 5 4 3 2 1 0
Bit Values 128 64 32 16 8 4 2 1
4th Octet of
IP Mask (249)
4th Octet of
IP Authorized
Address (125)
Bits 1 and 2 in the mask are “off”, and bits 0 and 3
- 7 are “on”, creating a value of 249 in the 4th octet .
Where a mask bit is “on”, the corresponding bit
setting in the address of a potentially authorized
station must match the IP Authorized Address
setting for that same bit. Where a mask bit is “off”
the corresponding bit setting in the address can be
either “on” or “off”. In this example, in order for a
station to be authorized to access the switch:
• The first three octets of the station’s IP address
must match the Authorized IP Address.
• Bit 0 and Bits 3 through 6 of the 4th octet in the
station’s address must be “on” (value = 1).
• Bit 7 of the 4th octet in the station’s address
must be “off” (value = 0).
• Bits 1 and 2 can be either “on” or “off”.
This means that stations with the IP address
13.28.227.X (where X is 121, 123, 125, or 127) are
authorized.
Figure 8-6. Example of How the Bitmap in the IP Mask Defines Authorized Manager Addresses
8-11
- HP Procurve Series 4100GL 3
- Switches 3
- 2 TACACS+ Authentication 6
- Getting Started 13
- Introduction 14
- Command Syntax Conventions 16
- Simulating Display Output 16
- Related Publications 17
- Sources for More Information 20
- Need Only a Quick Start? 21
- Menu: Setting Passwords 26
- TACACS+ Authentication 29
- Software 31
- Release G.05. xx 31
- Terminology Used in TACACS 32
- Applications: 32
- General System Requirements 33
- Privilege Levels 35
- Before You Begin 37
- Configuration 38
- Caution Regarding 41
- Login Primary 41
- Note on 44
- Encryption Keys 44
- First-Choice TACACS+ Server 46
- How Authentication Operates 48
- Local Authentication Process 50
- Using the Encryption Key 51
- Access When Using TACACS+ 52
- Authentication 52
- Messages Related to TACACS+ 53
- Preparation: 59
- Want RADIUS To Protect 62
- The switch now 63
- SSH authentication 63
- Access When Using RADIUS 69
- IP address: 10.33.18.151 73
- Stop-Only: 75
- Start-Stop: 75
- Viewing RADIUS Statistics 77
- RADIUS Accounting Statistics 80
- Prerequisite for Using SSH 88
- Public Key Formats 89
- Host Public 96
- Key for the 96
- Bit size 97
- Exponent <e> 97
- Modulus <n> 97
- Client Contact Behavior 99
- Execute no ip ssh 100
- Public-Key Authentication 106
- Bit Size Exponent 107
- <e> 107
- Modulus 107
- <n> 107
- Comment 107
- Key Index 109
- Contents 113
- Overview 114
- Terminology 115
- Prerequisite for Using SSL 116
- Operation 119
- Password 120
- Security Tab 120
- Show host certificate 124
- Current SSL 127
- Host Certificate 127
- Browser Contact Behavior 129
- Enable SLL 132
- Common Errors in SSL setup 133
- (802.1x) 135
- Overview 136
- How 802.1x Operates 139
- as defined in the 142
- 802.1x standard 142
- Access Control (802.1x) 145
- Authenticators 148
- 802.1x Open VLAN Mode 154
- 802.1x Open VLAN Mode 155
- Unauthorized-Client VLANs 158
- 802.1x Devices 165
- Blocking a Non 166
- 802.1x Device 166
- Other Switches 167
- Statistics, and Counters 171
- The switch reboots 176
- After the 802.1x session 180
- Basic Operation 184
- • PC1 can access Switch A 186
- Planning Port Security 187
- Configuring Port Security 192
- Security Features 197
- Alert Flags 197
- Resetting Alert Flags 199
- Yes” for the port on which 201
- Options 209
- Access Levels 209
- Stations 210
- Managers 211
- Building IP Masks 215
- IP Entry 216
- Operating Notes 218
- Using Authorized IP Managers 219
- Index – 1 221
- 2 – Index 222
- Index – 3 223
- 4 – Index 224
- Index – 5 225
- 6 – Index 226
- 5990-3032 228
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