Web Management Guide-R06
Table Of Contents
- How to Use This Guide
- Contents
- Figures
- Tables
- Getting Started
- Web Configuration
- Using the Web Interface
- Basic Management Tasks
- Displaying System Information
- Displaying Hardware/Software Versions
- Configuring Support for Jumbo Frames
- Displaying Bridge Extension Capabilities
- Managing System Files
- Setting the System Clock
- Configuring the Console Port
- Configuring Telnet Settings
- Displaying CPU Utilization
- Displaying Memory Utilization
- Stacking
- Resetting the System
- Interface Configuration
- VLAN Configuration
- Address Table Settings
- Spanning Tree Algorithm
- Congestion Control
- Class of Service
- Quality of Service
- VoIP Traffic Configuration
- Security Measures
- AAA (Authentication, Authorization and Accounting)
- Configuring User Accounts
- Web Authentication
- Network Access (MAC Address Authentication)
- Configuring HTTPS
- Configuring the Secure Shell
- Access Control Lists
- Setting a Time Range
- Showing TCAM Utilization
- Setting the ACL Name and Type
- Configuring a Standard IPv4 ACL
- Configuring an Extended IPv4 ACL
- Configuring a Standard IPv6 ACL
- Configuring an Extended IPv6 ACL
- Configuring a MAC ACL
- Configuring an ARP ACL
- Binding a Port to an Access Control List
- Configuring ACL Mirroring
- Showing ACL Hardware Counters
- ARP Inspection
- Filtering IP Addresses for Management Access
- Configuring Port Security
- Configuring 802.1X Port Authentication
- DoS Protection
- IPv4 Source Guard
- IPv6 Source Guard
- DHCP Snooping
- Basic Administration Protocols
- Configuring Event Logging
- Link Layer Discovery Protocol
- Power over Ethernet
- Simple Network Management Protocol
- Configuring Global Settings for SNMP
- Setting the Local Engine ID
- Specifying a Remote Engine ID
- Setting SNMPv3 Views
- Configuring SNMPv3 Groups
- Setting Community Access Strings
- Configuring Local SNMPv3 Users
- Configuring Remote SNMPv3 Users
- Specifying Trap Managers
- Creating SNMP Notification Logs
- Showing SNMP Statistics
- Remote Monitoring
- Switch Clustering
- Ethernet Ring Protection Switching
- Connectivity Fault Management
- Configuring Global Settings for CFM
- Configuring Interfaces for CFM
- Configuring CFM Maintenance Domains
- Configuring CFM Maintenance Associations
- Configuring Maintenance End Points
- Configuring Remote Maintenance End Points
- Transmitting Link Trace Messages
- Transmitting Loop Back Messages
- Transmitting Delay-Measure Requests
- Displaying Local MEPs
- Displaying Details for Local MEPs
- Displaying Local MIPs
- Displaying Remote MEPs
- Displaying Details for Remote MEPs
- Displaying the Link Trace Cache
- Displaying Fault Notification Settings
- Displaying Continuity Check Errors
- OAM Configuration
- UDLD Configuration
- Multicast Filtering
- Overview
- Layer 2 IGMP (Snooping and Query for IPv4)
- Configuring IGMP Snooping and Query Parameters
- Specifying Static Interfaces for a Multicast Router
- Assigning Interfaces to Multicast Services
- Setting IGMP Snooping Status per Interface
- Filtering IGMP Query Packets and Multicast Data
- Displaying Multicast Groups Discovered by IGMP Snooping
- Displaying IGMP Snooping Statistics
- Filtering and Throttling IGMP Groups
- MLD Snooping (Snooping and Query for IPv6)
- Layer 3 IGMP (Query used with Multicast Routing)
- Multicast VLAN Registration for IPv4
- Multicast VLAN Registration for IPv6
- IP Configuration
- IP Services
- General IP Routing
- Configuring Router Redundancy
- Unicast Routing
- Overview
- Configuring the Routing Information Protocol
- Configuring General Protocol Settings
- Clearing Entries from the Routing Table
- Specifying Network Interfaces
- Specifying Passive Interfaces
- Specifying Static Neighbors
- Configuring Route Redistribution
- Specifying an Administrative Distance
- Configuring Network Interfaces for RIP
- Displaying RIP Interface Settings
- Displaying Peer Router Information
- Resetting RIP Statistics
- Configuring the Open Shortest Path First Protocol (Version 2)
- Defining Network Areas Based on Addresses
- Configuring General Protocol Settings
- Displaying Administrative Settings and Statistics
- Adding an NSSA or Stub
- Configuring NSSA Settings
- Configuring Stub Settings
- Displaying Information on NSSA and Stub Areas
- Configuring Area Ranges (Route Summarization for ABRs)
- Redistributing External Routes
- Configuring Summary Addresses (for External AS Routes)
- Configuring OSPF Interfaces
- Configuring Virtual Links
- Displaying Link State Database Information
- Displaying Information on Neighboring Routers
- Multicast Routing
- Appendices
- Glossary
- Index
Chapter 12
| Security Measures
IPv4 Source Guard
– 375 –
IPv4 Source Guard
IPv4 Source Guard is a security feature that filters IP traffic on network interfaces
based on manually configured entries in the IP Source Guard table, or dynamic
entries in the DHCP Snooping table when enabled (see “DHCP Snooping” on
page 387). IP source guard can be used to prevent traffic attacks caused when a
host tries to use the IPv4 address of a neighbor to access the network. This section
describes how to configure IPv4 Source Guard.
Configuring Ports
for IPv4 Source Guard
Use the Security > IP Source Guard > Port Configuration page to set the filtering
type based on source IP address, or source IP address and MAC address pairs. It also
specifies lookup within the ACL binding table or the MAC address binding table, as
well as the maximum number of allowed binding entries for the lookup tables.
IP Source Guard is used to filter traffic on an insecure port which receives messages
from outside the network or fire wall, and therefore may be subject to traffic attacks
caused by a host trying to use the IP address of a neighbor.
Command Usage
Filter Type
◆
Setting source guard mode to SIP (Source IP) or SIP-MAC (Source IP and MAC)
enables this function on the selected port. Use the SIP option to check the
VLAN ID, source IP address, and port number against all entries in the binding
table. Use the SIP-MAC option to check these same parameters, plus the source
MAC address. If no matching entry is found, the packet is dropped.
Note:
Multicast addresses cannot be used by IP Source Guard.
◆ When enabled, traffic is filtered based upon dynamic entries learned via DHCP
snooping (see “DHCP Snooping” on page 387), or static addresses configured in
the source guard binding table.
◆ If IP source guard is enabled, an inbound packet’s IP address (SIP option) or
both its IP address and corresponding MAC address (SIP-MAC option) will be
checked against the binding table. If no matching entry is found, the packet
will be dropped.
◆ An entry with same MAC address and a different VLAN ID cannot be added to
the binding table.
◆ Filtering rules are implemented as follows:
■
If DHCP snooping is disabled (see page 389), IP source guard will check the
VLAN ID, source IP address, port number, and source MAC address (for the
SIP-MAC option). If a matching entry is found in the binding table and the
entry type is static IP source guard binding, the packet will be forwarded.