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
46 ServerIron ADX Security Guide
53-1002440-03
DNS attack protection
1
This command enables DNS content switching.
Configuring global commands for DNS attack protection
You can optionally configure the following to apply to all DNS attack protection configurations:
• Dropping all DNS packets that are fragmented
• Dropping all DNS packets with multiple queries
• Dropping all DNS packets that are malformed
To configure a ServerIron ADX to drop all DNS packets that are fragmented, use the server dns-dpi
drop-frag-pkts command as shown.
ServerIron(config) server dns-dpi drop-frag-pkts
Syntax: [no] server dns-dpi drop-frag-pkts
To configure a ServerIron ADX to drop all DNS packets with multiple queries, use the server dns-dpi
drop-multiple-query-pkts command as shown.
ServerIron(config) server dns-dpi drop-multiple-query-pkts
Syntax: [no] server dns-dpi drop-multiple-query-pkts
To configure a ServerIron ADX to drop all DNS packets that are malformed, use the server dns-dpi
drop-incomplete-malformed-pkts command as shown.
ServerIron(config) server dns-dpi drop-incomplete-malformed-pkts
Syntax: [no] server dns-dpi drop-incomplete-malformed-pkts
Configuring the ADX to drop requests if servers in redirect actions are down
You can configure the ServerIron ADX to drop requests if servers in redirect actions are down as
shown.
ServerIron(config-csw-pol-p1) dns-drop-on-fwd-fail
Syntax: [no] dns-drop-on-fwd-fail
Configuring the ADX to evaluate rules without query name first
You can configure the ServerIron ADX to evaluate rules without query name first as shown.
ServerIron(config-csw-pol-p1) evaluate-generic-first
Syntax: [no] evaluate-generic-first
Displaying DNS attack protection information
The following information can be displayed regarding DNS attack protection.
• DNS DPI policy counters
• IP addresses held down by a rate limit action
DIsplaying DNS DPI policy counters
DNS DPI policy counters can be displayed for a specified DNS policy as shown.