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 35
53-1002440-03
Syn-cookie threshhold trap
1
Enabling track firewall group
To enable track-fw-group to track the firewall group state, use the following commands.
ServerIronADX(config)#int ve 1
ServerIronADX(config-vif-1)# ip vrrp-e vrid 1
ServerIronADX(config-vif-1-vrid-1)# track-fw-group
Syntax: track-fw-group <group-num>
Use the track-fw-group command under the VRRPE config level. <group-num> is the firewall group
that needs to be tracked for this VRRPE. This command is used along with the fw-vrrpe-priority
command to force VRRPE state to track the FW group state. This command works similar to the
track-port command. When the firewall group state is STANDBY, then the VRRPE current priority is
decremented by the fw-vrrpe-priority specified under that firewall group. It is recommended that
you track only the firewall group state and no other port, because tracking firewall group state
automatically tracks the router ports, firewall paths, and more.
Enabling firewall session sync delay
To enable server fw-sess-sync-delay, use the following command.
ServerIronADX(config)#server fw-sess-sync-delay 10
Syntax: server fw-sess-sync-delay <secs>
Use the server fw-sess-sync-delay command added at the global config level. <secs> is the number
of seconds to delay the fast session sync after one of the ServerIrons is reloaded in HA FWLB. Valid
values range from 1 to 100. This command can be useful in configurations where many real
servers or firewalls are configured.
Syn-cookie threshhold trap
To configure the syn cookie attack rate threshold, use the following command.
ServerIronADX(config)# server syn-cookie-attack-rate-threshold 10000
Syntax: syn-cookie-attack-rate-threshold <threshhold>
The <threshhold> variable is a decimal number ranging from 1 to 10000000.
If the current syn cookie attack rate is larger than the syn cookie attack rate threshhold, the
snTrapSynCookieAttackThreshReached trap is generated.
To configure the snTrapSynCookieAttackThreshReached trap interval, use the following command.
ServerIronADX(config)# server max-conn-trap-interval 10
Syntax: server max-conn-trap-interval <decimal number in seconds>
The <seconds> variable is a decimal number in seconds. The default value is 60 seconds.
Service port attack protection in hardware
A ServerIron can be enabled to deny traffic that is destined to VIP address but to a port that is not
defined under a VIP. Such traffic can be dropped in hardware without impacting the MP or BP CPUs.