Home Theater Server User Manual
Table Of Contents
- Contents
- About This Document
- Network Security
- TCP SYN attacks
- IP TCP syn-proxy
- Granular application of syn-proxy feature
- Syn-def
- No response to non-SYN first packet of a TCP flow
- Prioritizing management traffic
- Peak BP utilization with TRAP
- Transaction Rate Limit (TRL)
- Understanding transaction rate limit
- Configuring transaction rate limit
- Configuring the maximum number of rules
- Saving a TRL configuration
- Transaction rate limit command reference
- Global TRL
- TRL plus security ACL-ID
- security acl-id
- Transaction rate limit hold-down value
- Displaying TRL rules statistics
- Displaying TRL rules in a policy
- Displaying IP address with held down traffic
- Refusing new connections from a specified IP address
- HTTP TRL
- Overview of HTTP TRL
- Configuring HTTP TRL
- Displaying HTTP TRL
- Display all HTTP TRL policies
- Display HTTP TRL policy from index
- Display HTTP TRL policy client
- Display HTTP TRL policy starting from index
- Display HTTP TRL policy matching a regular expression
- Display HTTP TRL policy client index (MP)
- Display HTTP TRL policy client index (BP)
- Display HTTP TRL policy for all client entries (BP)
- Downloading an HTTP TRL policy through TFTP
- HTTP TRL policy commands
- Logging for DoS Attacks
- Maximum connections
- clear statistics dos-attack
- Maximum concurrent connection limit per client
- Firewall load balancing enhancements
- Syn-cookie threshhold trap
- Service port attack protection in hardware
- Traffic segmentation
- DNS attack protection
- Access Control List
- How ServerIron processes ACLs
- Default ACL action
- Types of IP ACLs
- ACL IDs and entries
- ACL entries and the Layer 4 CAM
- Configuring numbered and named ACLs
- Modifying ACLs
- Displaying a list of ACL entries
- Applying an ACLs to interfaces
- ACL logging
- Dropping all fragments that exactly match a flow-based ACL
- Enabling ACL filtering of fragmented packets
- Enabling hardware filtering for packets denied by flow-based ACLs
- Enabling strict TCP or UDP mode for flow-based ACLs
- ACLs and ICMP
- Using ACLs and NAT on the same interface (flow-based ACLs)
- Displaying ACL bindings
- Troubleshooting rule-based ACLs
- IPv6 Access Control Lists
- Network Address Translation
- Syn-Proxy and DoS Protection
- Understanding Syn-Proxy
- Configuring Syn-Proxy
- DDoS protection
- Configuring a security filter
- Configuring a Generic Rule
- Configuring a rule for common attack types
- Configuring a rule for ip-option attack types
- Configuring a rule for icmp-type options
- Configuring a rule for IPv6 ICMP types
- Configuring a rule for IPv6 ext header types
- Binding the filter to an interface
- Clearing DOS attack statistics
- Clearing all DDOS Filter & Attack Counters
- Logging for DoS attacks
- Displaying security filter statistics
- Address-sweep and port-scan logging
- Secure Socket Layer (SSL) Acceleration
- SSL overview
- SSL acceleration on the ServerIron ADX
- Configuring SSL on a ServerIron ADX
- Basic SSL profile configuration
- Advanced SSL profile configuration
- Configuring Real and Virtual Servers for SSL Termination and Proxy Mode
- Configuration Examples for SSL Termination and Proxy Modes
- SSL debug and troubleshooting commands
- Displaying socket information

ServerIron ADX Security Guide 31
53-1002440-03
Maximum connections
1
show server conn-rate
Use show server conn-rate to display the global TCP connection rate (per second) and TCP SYN
attack rate (per second). This command reports global connection rate information for the
ServerIron as well as for each real server.
Maximum connections
Use max-conn to set the number of maximum connections on a global real server level (all ports) or
a single port.
clear statistics dos-attack
Use clear statistics dos-attack to reset counters for ICMP and TCP SYN packet burst thresholds, as
displayed by show statistics dos-attack.
Example
ServerIronADX# clear statistics dos-attack
ServerIronADX# show statistics dos-attack
NOTE
The above commands are used to reset and verify counters for ICMP and TCP SYN packet burst
thresholds. The ServerIron ADX has introduced more a powerful feature to detect and block DoS
attacks. Please refer to the chapter titled: “Syn-Proxy and DoS Protection” on page 113 to view
details about verifying and clearing DOS-attack counters and filters.
ServerIronADX# show server conn-rate
Avail. Sessions = 524286 Total Sessions = 524288
Total C->S Conn = 0 Total S->C Conn = 0
Total Reassign = 0 Unsuccessful Conn = 0
last conn rate = 0 max conn rate = 0
last TCP attack rate = 0 max TCP attack rate = 0
SYN def RST = 0 SYN flood = 0
Server State - 1:enabled, 2:failed, 3:test, 4:suspect, 5:grace_dn, 6:active
Real Server State CurrConn TotConn LastRate CurrRate MaxRate
rs1 3 0 0 0 0 0
All ports
One port
!
server real rs1 10.10.1.30
max-conn 1200
port http
port http max-conn 1000
port http url "HEAD /"
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