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
164 ServerIron ADX Security Guide
53-1002440-03
Basic SSL profile configuration
6
To enable the ServerIronADX to send the entire certificate chain configure the
enable-certificate-chaining command within an SSL profile as described in “Enabling a certificate
chain” on page 169.
Support for SSL renegotiation
Some SSL application clients use renegotiation as a way within SSL protocols to change cipher
specifications and redo the handshake. It has been found however that unsecure renegotiation is
susceptible to Man-in-the-Middle attack.
Although ServerIron ADX does not support renegotiation and is therefor not susceptible to these
attacks, it doesn’t handle renegotiation requests from the client properly in some cases which
causes some web browsers to report a security flaw with ServerIron ADX which is a false alarm.
With this feature enabled as shown, a ServerIron ADX responds to renegotiation requests which
stops the browser from sending false alarms.
ServerIronADX(config)# server respond-with-renegotiation-info
Syntax: {no} ssl server respond-with-renegotiation-info
With this command enabled, a ServerIron ADX will look for renegotitation-related heaters in SSL
packets and respond accordingly.
Where this command is not enabled, a ServerIron ADX ignores all renegotiation-related headers.
NOTE
While a ServerIron ADX with this command enabled will respond to renegotiation requests,
ServerIron ADX does not currently support renegotiation.
Basic SSL profile configuration
All SSL configuration parameters are configured in the configuration level under the specific SSL
profile. An SSL profile is created using the ssl profile command at the General configuration level
as shown.
ServerIronADX(config)# ssl profile profile1
ServerIronADX(config-ssl-profile-profile1)#
Syntax: ssl profile <profile-name>
The <profile-name> variable is an ASCII string that specifies the name of the SSL profile being
defined.
At a minimum the following parameters need to be configured for an SSL profile:
• The RSA key-pair for the SSL connection
• The cipher suite for the SSL connection
• The digital certificate for the SSL connection (specified or self-signed)