
C
HAPTER
25
| General Security Measures
Denial of Service Protection
– 960 –
dos-protection
tcp-syn-fin-scan
This command protects against DoS TCP-SYN/FIN-scan attacks in which a
TCP SYN/FIN scan message is used to identify listening TCP ports. The scan
uses a series of strangely configured TCP packets which contain SYN
(synchronize) and FIN (finish) flags. If the target's TCP port is closed, the
target replies with a TCP RST (reset) packet. If the target TCP port is open,
it simply discards the TCP SYN FIN scan. Use the
no
form to disable this
feature.
S
YNTAX
[
no
]
dos-protection syn-fin-scan
D
EFAULT
S
ETTING
Enabled
C
OMMAND
M
ODE
Global Configuration
E
XAMPLE
Console(config)#dos-protection syn-fin-scan
Console(config)#
dos-protection
tcp-udp-port-zero
This command protects against DoS attacks in which the UDP or TCP
source port or destination port is set to zero. This technique may be used
as a form of DoS attack, or it may just indicate a problem with the source
device. Use the
no
form to restore the default setting.
S
YNTAX
dos-protection tcp-udp-port-zero
{
drop
|
forward
}
no
dos-protection tcp-udp-port-zero
drop
– Drops all packets with the Layer 4 source port or destination
port set to zero.
forward
– Forwards all packets with the Layer 4 source port or
destination port set to zero.
D
EFAULT
S
ETTING
Drop
C
OMMAND
M
ODE
Global Configuration
E
XAMPLE
Console(config)#dos-protection tcp-udp-port-zero forward
Console(config)#
Содержание ECS4110-28T
Страница 1: ...Management Guide www edge core com ECS4110 28T 28P 52T 52P 28 52 Port Gigabit Ethernet Layer 2 Switch...
Страница 2: ......
Страница 4: ......
Страница 63: ...FIGURES 63 Figure 428 Configuring VLAN Translation 1177...
Страница 64: ...FIGURES 64...
Страница 72: ...TABLES 72...
Страница 74: ...SECTION I Getting Started 74...
Страница 102: ...SECTION II Web Configuration 102 General IP Routing on page 679...
Страница 154: ...CHAPTER 4 Basic Management Tasks Resetting the System 154...
Страница 198: ...CHAPTER 5 Interface Configuration VLAN Trunking 198 Figure 65 Configuring VLAN Trunking...
Страница 272: ...CHAPTER 9 Congestion Control Automatic Traffic Control 272...
Страница 286: ...CHAPTER 10 Class of Service Layer 3 4 Priority Settings 286...
Страница 420: ...CHAPTER 13 Security Measures DHCP Snooping 420...
Страница 566: ...CHAPTER 14 Basic Administration Protocols OAM Configuration 566...
Страница 638: ...CHAPTER 15 Multicast Filtering Multicast VLAN Registration for IPv6 638...
Страница 662: ...CHAPTER 16 IP Configuration Setting the Switch s IP Address IP Version 6 662...
Страница 678: ...CHAPTER 17 IP Services Configuring the PPPoE Intermediate Agent 678...
Страница 792: ...CHAPTER 21 System Management Commands Switch Clustering 792...
Страница 822: ...CHAPTER 23 Remote Monitoring Commands 822...
Страница 888: ...CHAPTER 24 Authentication Commands PPPoE Intermediate Agent 888...
Страница 968: ...CHAPTER 25 General Security Measures Port based Traffic Segmentation 968...
Страница 994: ...CHAPTER 26 Access Control Lists ACL Information 994...
Страница 1034: ...CHAPTER 28 Link Aggregation Commands Trunk Status Display Commands 1034...
Страница 1044: ...CHAPTER 29 Power over Ethernet Commands 1044...
Страница 1084: ...CHAPTER 33 UniDirectional Link Detection Commands 1084...
Страница 1090: ...CHAPTER 34 Address Table Commands 1090...
Страница 1194: ...CHAPTER 37 VLAN Commands Configuring Voice VLANs 1194...
Страница 1388: ...CHAPTER 42 CFM Commands Delay Measure Operations 1388...
Страница 1410: ...CHAPTER 44 Domain Name Service Commands 1410...
Страница 1420: ...CHAPTER 45 DHCP Commands DHCP Relay 1420...
Страница 1472: ...CHAPTER 46 IP Routing Commands IPv4 Commands 1472...
Страница 1474: ...SECTION IV Appendices 1474...
Страница 1502: ...COMMAND LIST 1502...
Страница 1513: ......
Страница 1514: ...ECS4110 28T ECS4110 28P ECS4110 52T ECS4110 52P E072014 ST R02 150200000929A...