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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 185
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Configuration Examples for SSL Termination and Proxy Modes
6
ServerIronADX(config)# server real rs1
ServerIronADX(config-rs-rs1)# port pop3
ServerIronADX(config-rs-rs1)# port imap4
ServerIronADX(config-rs-rs1)# port ldap
ServerIronADX(config-rs-rs1)# exit
ServerIronADX(config)#
ServerIronADX(config)# server real rs2
ServerIronADX(config-rs-rs2)# port pop3
ServerIronADX(config-rs-rs2)# port imap4
ServerIronADX(config-rs-rs2)# port ldap
ServerIronADX(config-rs-rs2)# exit
ServerIronADX(config)#
ServerIronADX(config)# server virtual-name-or-ip vip1
ServerIronADX(config-vs-vip1)# port pop3s
ServerIronADX(config-vs-vip1)# port pop3s ssl-terminate sslprof
ServerIronADX(config-vs-vip1)# bind pop3s rs1 pop3 rs2 pop3
ServerIronADX(config-vs-vip1)# exit
ServerIronADX(config)#
ServerIronADX(config)# server virtual-name-or-ip vip1
ServerIronADX(config-vs-vip1)# port imaps
ServerIronADX(config-vs-vip1)# port imaps ssl-terminate sslprof
ServerIronADX(config-vs-vip1)# bind imaps rs1 imap4 rs2 imap4
ServerIronADX(config-vs-vip1)#
ServerIronADX(config-vs-vip1)# port ldaps
ServerIronADX(config-vs-vip1)# port ldaps ssl-terminate sslprof
ServerIronADX(config-vs-vip1)# bind ldaps rs1 ldap rs2 ldap
ServerIronADX(config-vs-vip1)# exit
ServerIronADX(config)#
Configuring the system max values
This section describes how to configure the following system max values on a ServerIron ADX:
• SSLv2 connection rate
• Memory limit for SSL hardware buffers
• Number of SSL profiles
• Maximum number of SSL concurrent connections
NOTE
Setting all of the system-max values to their maximum value is not advisable as it consumes a large
amount of system memory. Please set these values only if necessary.
Configuring SSLv2 connection rate
You can configure the maximum connection rate for SSLv2, as shown in the following example.
ServerIronADX(config)# ssl-v2-rate <num-conn-per-sec>
Syntax: ssl-v2-rate <num-conn-per-sec>
The <num-conn-per-sec> variable sets the maximum connections for SSLv2 allowed per second.
Valid range: 16 to 256
Default: 100