
C
HAPTER
13
| Security Measures
IPv4 Source Guard
– 433 –
C
ONFIGURING
P
ORTS FOR
IP S
OURCE
G
UARD
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.
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.
CLI R
EFERENCES
◆
"ip source-guard" on page 1135
C
OMMAND
U
SAGE
◆
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.
N
OTE
:
Multicast addresses cannot be used by IP Source Guard.
◆
When enabled, traffic is filtered based upon dynamic entries learned via
), 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.
◆
Filtering rules are implemented as follows:
■
If DHCP snooping is disabled (see
), 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.
■
If DHCP snooping is enabled, 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, or
dynamic DHCP snooping binding, the packet will be forwarded.
■
If IP source guard if enabled on an interface for which IP source
bindings have not yet been configured (neither by static
configuration in the IP source guard binding table nor dynamically
learned from DHCP snooping), the switch will drop all IP traffic on
that port, except for DHCP packets.
Summary of Contents for ECS4660-28F
Page 1: ...Management Guide www edge core com ECS4660 28F Layer 3 Gigabit Ethernet Switch...
Page 2: ......
Page 4: ......
Page 12: ...ABOUT THIS GUIDE 12...
Page 64: ...CONTENTS 64...
Page 90: ...TABLES 90...
Page 92: ...SECTION I Getting Started 92...
Page 122: ...SECTION II Web Configuration 122 Multicast Routing on page 825...
Page 148: ...CHAPTER 3 Using the Web Interface Navigating the Web Browser Interface 148...
Page 224: ...CHAPTER 5 Interface Configuration VLAN Trunking 224 Figure 68 Configuring VLAN Trunking...
Page 262: ...CHAPTER 6 VLAN Configuration Configuring VLAN Translation 262...
Page 304: ...CHAPTER 9 Congestion Control Automatic Traffic Control 304...
Page 340: ...CHAPTER 11 Quality of Service Attaching a Policy Map to a Port 340...
Page 452: ...CHAPTER 13 Security Measures DHCP Snooping 452...
Page 740: ...CHAPTER 17 IP Services Configuring the PPPoE Intermediate Agent 740...
Page 866: ...CHAPTER 21 Multicast Routing Configuring PIMv6 for IPv6 866...
Page 882: ...CHAPTER 22 Using the Command Line Interface CLI Command Groups 882...
Page 1024: ...CHAPTER 26 Remote Monitoring Commands 1024...
Page 1030: ...CHAPTER 27 Flow Sampling Commands 1030...
Page 1088: ...CHAPTER 28 Authentication Commands PPPoE Intermediate Agent 1088...
Page 1162: ...CHAPTER 29 General Security Measures Configuring Port based Traffic Segmentation 1162...
Page 1186: ...CHAPTER 30 Access Control Lists ACL Information 1186...
Page 1214: ...CHAPTER 31 Interface Commands Transceiver Threshold Configuration 1214...
Page 1238: ...CHAPTER 33 Port Mirroring Commands RSPAN Mirroring Commands 1238...
Page 1258: ...CHAPTER 34 Congestion Control Commands Automatic Traffic Control Commands 1258...
Page 1270: ...CHAPTER 36 UniDirectional Link Detection Commands 1270...
Page 1276: ...CHAPTER 37 Address Table Commands 1276...
Page 1336: ...CHAPTER 39 ERPS Commands 1336...
Page 1386: ...CHAPTER 40 VLAN Commands Configuring Voice VLANs 1386...
Page 1406: ...CHAPTER 41 Class of Service Commands Priority Commands Layer 3 and 4 1406...
Page 1424: ...CHAPTER 42 Quality of Service Commands 1424...
Page 1536: ...CHAPTER 43 Multicast Filtering Commands MLD Proxy Routing 1536...
Page 1602: ...CHAPTER 45 CFM Commands Delay Measure Operations 1602...
Page 1624: ...CHAPTER 47 Domain Name Service Commands 1624...
Page 1646: ...CHAPTER 48 DHCP Commands DHCP Server 1646...
Page 1974: ...SECTION IV Appendices 1974...
Page 1980: ...APPENDIX A Software Specifications Management Information Bases 1980...