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decisions are made based on the results of those comparisons. You enable this feature
on VLANs.
•
MAC limiting—Protects against flooding of the Ethernet switching table (also known
as the MAC forwarding table or Layer 2 forwarding table). You enable this feature on
access interfaces (ports).
•
MAC move limiting—Detects MAC movement and MAC spoofing on access ports. You
enable this feature on VLANs.
•
Trusted DHCP server—With a DHCP server on a trusted port, protects against rogue
DHCP servers sending leases. You enable this feature on interfaces (ports). By default,
access ports are untrusted and trunk ports are trusted. (Access ports are the switch
ports that connect to Ethernet endpoints such as user PCs and laptops, servers, and
printers. Trunk ports are the switch ports that connect to other Ethernet switches or
to routers.)
•
IP source guard—Mitigates the effects of IP address spoofing attacks on the Ethernet
LAN. You enable this feature on VLANs. With IP source guard enabled, the source IP
address in the packet sent from an untrusted access interface is validated against the
source MAC address in the DHCP snooping database. The packet is allowed for further
processing if the source IP address to source MAC address binding is valid; if the binding
is not valid, the packet is discarded.
•
DHCP option 82—Also known as the DHCP relay agent information option. Helps
protect the J-EX Series switch against attacks such as spoofing of IP addresses and
MAC addresses and DHCP IP address starvation. Option 82 provides information about
the network location of a DHCP client, and the DHCP server uses this information to
implement IP addresses or other parameters for the client.
Related
Documentation
Security Features for J-EX Series Switches Overview on page 16
•
•
Understanding DHCP Snooping for Port Security on J-EX Series Switches on page 2549
•
Understanding DAI for Port Security on J-EX Series Switches on page 2555
•
•
Understanding IP Source Guard for Port Security on J-EX Series Switches on page 2563
•
Understanding DHCP Option 82 for Port Security on J-EX Series Switches on page 2560
•
Understanding How to Protect Access Ports on J-EX Series Switches from Common
Attacks on page 2546
Understanding How to Protect Access Ports on J-EX Series Switches from Common
Attacks
Port security features can protect the J-EX Series Switch against various types of attacks.
Protection methods against some common attacks are:
•
Mitigation of Ethernet Switching Table Overflow Attacks on page 2547
•
Mitigation of Rogue DHCP Server Attacks on page 2547
2546
Dell PowerConnect J-Series Ethernet Switch Complete Software Guide for Junos OS
Содержание PowerConnect J-EX8208
Страница 1: ...Dell PowerConnect J Series Ethernet Switch Complete Software Guide for Junos OS Published 2010 11 10 ...
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Страница 383: ...CHAPTER 21 Configuration Statements for Power Management 311 ...
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Страница 1457: ... Understanding MSTP for J EX Series Switches on page 1277 1385 Chapter 68 Configuration Statements for Spanning Tree Protocols ...
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Страница 1801: ...Related Documentation Tracing RIP Protocol Traffic 1729 Chapter 73 Configuration Statements for Layer 3 Protocols ...
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Страница 2321: ...Figure 45 Example Authentication Topology 2249 Chapter 81 802 1X and MAC RADIUS Authentication Overview ...
Страница 2341: ...Figure 49 Topology for Configuration 2269 Chapter 82 Examples Access Control Configuration ...
Страница 2350: ...Figure 51 Topology for Guest VLAN Example 2278 Dell PowerConnect J Series Ethernet Switch Complete Software Guide for Junos OS ...
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Страница 3445: ...Bad values 0 General errors 0 Get requests 0 Get nexts 0 Set requests 0 Get responses 0 Traps 0 3373 Chapter 128 SNMP ...
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Страница 3569: ...4 Drop none 5 Drop none 6 Drop none 7 down Receive none 3497 Chapter 131 Ethernet OAM Connectivity Fault Management ...
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Страница 3603: ...CHAPTER 134 Operational Mode Commands for General Network Management and Monitoring 3531 ...
Страница 3619: ...PART 25 Index Index on page 3549 3547 ...
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