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
178 ServerIron ADX Security Guide
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Configuration Examples for SSL Termination and Proxy Modes
6
Example
Create Client Side SSL profile with required settings
ServerIronADX(config)# ssl profile clientprofile
ServerIronADX(config-ssl-profile-clientprofile)# keypair-file rsakey-file
ServerIronADX(config-ssl-profile-clientprofile)# certificate-file mycert
ServerIronADX(config-ssl-profile-clientprofile)# cipher-suite all
ServerIronADX(config-ssl-profile-clientprofile)# exit
Create server side SSL profile with required settings
ServerIronADX(config)# ssl profile serverprofile
ServerIronADX(config-ssl-profile-serverprofile)# ca-cert-file ca.cert
ServerIronADX(config-ssl-profile-clientprofile)# cipher-suite all
Define SSL ports on real servers
ServerIronADX(config)# server real rs1 10.1.1.1
ServerIronADX(config-rs-rs1)# port ssl
Within virtual server: Define SSL port, specify server profile and enable SSL proxy
ServerIronADX(config)# server virtual-name-or-ip vip3 10.1.1.3
ServerIronADX(config-vs-vip3)# port ssl
ServerIronADX(config-vs-vip3)# port ssl ssl-proxy clientprofile serverprofile
Bind SSL in virtual server to real server SSL ports
ServerIronADX(config-vs-vip3)# bind ssl rs1 ssl
TCP configuration issues with SSL Terminate and SSL Proxy
When SSL terminate or SSL proxy are enabled, the ServerIron ADX uses TCP full stack. In such
case, the Nagle Algorithm and delayed ACK mechanism are ON by default. There are instances
where both of these features should be disabled.
For example, a customer may be experiencing slow response time because the ServerIron ADX is
sending one packet at a time, and waiting for an ACK from the server before sending the next
packet. The server is sending ACKs with a delay of 200 ms, causing a delay of 200 ms between
every successive packet. This results in extremely poor performance. Packet traces taken from the
client and server sides explain this situation in detail, as shown in the following figures.
Figure 15 shows the client ptrace information. Figure 16 shows the server ptrace information.