> Personal Stateful Firewall Configuration
> This chapter describes how to configure the Personal Stateful Firewall in-line service feature.
> Important: In StarOS 8.x, Stateful Firewall for CDMA and early UMTS releases used rulebase-based configurations, whereas in later UMTS releases Stateful Firewall used policy-based configurations. In StarOS 9.0, Stateful Firewall for UMTS and CDMA releases both use policy-based configurations. For more information, please contact your local service representative.
> This chapter covers the following topics:

> • | Configuring the System

> • | Stateful Firewall Configuration

> • | Optional Configurations

> • | Saving the Configuration

> • | Gathering Stateful Firewall Statistics

> • | Managing Your Configuration

> Before You Begin
> This section lists the steps to perform before you can start configuring Stateful Firewall support on a system.

> Step 1 | Configure the required core network service on the system as described in the System Administration Guide.

> Step 2 | Obtain and install the required feature licenses for the required number of subscriber sessions.

> Step 3 | Proceed to the Configuring the System section.

> Configuring the System
> This section lists the high-level steps to configure Stateful Firewall support on a system.
> Important: In StarOS 8.x, Stateful Firewall for CDMA and early UMTS releases used rulebase-based configurations, whereas later UMTS releases used policy-based configurations. In StarOS 9.0, Stateful Firewall for UMTS and CDMA releases both use policy-based configurations. For more information, please contact your local service representative.

> Step 1 | Configure Stateful Firewall support as described in the Stateful Firewall Configuration section.

> Step 2 | Save changes to the system configuration as described in the Saving the Configuration section.

> Configuring Stateful Firewall
> This section describes how to configure Stateful Firewall support in a system.
> Important: In StarOS 8.x, Stateful Firewall for CDMA and early UMTS releases used rulebase-based configurations, whereas later UMTS releases used policy-based configurations. In StarOS 9.0, Stateful Firewall for UMTS and CDMA releases both use policy-based configurations. For more information, please contact your local service representative.

> Step 1 | Enable the Enhanced Charging Service (ECS) subsystem and create the ECS service as described in the Enabling the ECS Subsystem and Creating the ECS Service section.

> Step 2 | Optional: Configure application-port maps for TCP and UDP protocols as described in the Configuring Port Maps section.

> Step 3 | Optional: Configure host pools as described in the Configuring Host Pools section.

> Step 4 | Optional: Configure IMSI pools as described in the Configuring IMSI Pools section.

> Step 5 | Configure access ruledefs as described in the Configuring Access Ruledefs section.

> Step 6 | Configure Firewall-and-NAT policies as described in the Configuring Firewall-and-NAT Policy section.

> Step 7 | Configure protection from DoS and other attacks as described in the Configuring Other Firewall Settings section.

> Step 8 | Configure ALGs as described in the Configuring Dynamic PinholesALGs section.

> Step 9 | Enable Stateful Firewall support for APN/subscribers as described in the Enabling Firewall for APNSubscribers section.

> Step 10 | Optional: Configure the default Firewall-and-NAT policy as described in the Configuring Default Firewall-and-NAT Policy section.

> Step 11 | Configure Stateful Firewall threshold limits and polling interval for DoS-attacks, dropped packets, deny rules, and no rules as described in the Configuring Stateful Firewall Thresholds section.

> Step 12 | Enable bulk statistics schema for the Personal Stateful Firewall service as described in t he Configuring Bulk Statistics Schema section.

> Step 13 | Enable Stateful Firewall Flow Recovery as described in the Configuring Flow Recovery section.

> Important: Commands used in the configuration examples in this section provide base functionality to the extent that the most common or likely commands and/or keyword options are presented. In many cases, other optional commands and/or keyword options are available. Refer to the Command Line Interface Reference for complete information regarding all commands.
> Enabling the ECS Subsystem and Creating the ECS Service
> To enable the ECS subsystem and create the enhanced charging service on the system, use the following configuration:
> configure
> require active-charging
> active-charging service <ecs_service_name> [ -noconfirm ]
> end
> Configuring Port Maps
> This is an optional configuration to create and configure port maps to use in access ruledef configuration.
> To create and configure a port map use the following configuration:
> configure
> active-charging service <ecs_service_name>
> port-map <port_map_name> [ -noconfirm ]
> port { <port_number> | range <start_port> to <end_port> }
> end
> Notes:

> • | A maximum of 256 host pools, IMSI pools, and port maps each, and a combined maximum of 4096 rules (host pools + IMSI pools + port maps + charging ruledefs + access ruledefs + routing ruledefs) can be created in a system.

> • | Port maps, host pools, IMSI pools, and charging, access, and routing ruledefs must each have unique names.

> • | A maximum of 10 options can be configured in each port map.

> Configuring Host Pools
> This is an optional configuration to create and configure host pools to use in access ruledef configuration.
> To create and configure a host pool use the following configuration:
> configure
> active-charging service <ecs_service_name>
> host-pool <host_pool_name> [ -noconfirm ]
> ip { <ip_address> | <ip_address/mask> | range <start_ip_address> to <end_ip_address> }
> end
> Notes:

> • | A maximum of 256 host pools, IMSI pools, and port maps each, and a combined maximum of 4096 rules (host pools + IMSI pools + port maps + charging ruledefs + access ruledefs + routing ruledefs) can be created in a system.

> • | Port maps, host pools, IMSI pools, and charging, access, and routing ruledefs must each have unique names.

> • | A maximum of 10 options can be configured in each host pool.

> Configuring IMSI Pools
> This is an optional configuration to create and configure IMSI pools to use in access ruledef configuration.
> To create and configure an IMSI pool use the following configuration:
> configure
> active-charging service <ecs_service_name>
> imsi-pool <imsi_pool_name> [ -noconfirm ]
> imsi { <imsi_number> | range <start_imsi> to <end_imsi> }
> end
> Notes:

> • | A maximum of 256 host pools, IMSI pools, and port maps each, and a combined maximum of 4096 rules (host pools + IMSI pools + port maps + charging ruledefs + access ruledefs + routing ruledefs) can be created in a system.

> • | Port maps, host pools, IMSI pools, and charging, access, and routing ruledefs must each have unique names.

> • | A maximum of 10 options can be configured in each IMSI pool.

> Configuring Access Ruledefs
> To create and configure an access rule definition use the following configuration:
> configure
> active-charging service <ecs_service_name>
> access-ruledef <access_ruledef_name> [ -noconfirm ]
> bearer apn [ case-sensitive ] <operator> <value>
> bearer imsi { <operator> <msid> | { !range | range } imsi-pool <imsi_pool_name> }
> bearer username [ case-sensitive ] <operator> <user_name>
> icmp { any-match <operator> <condition> | code <operator> <code> | type <operator> <type> }
> ip { { { any-match | downlink | uplink } <operator> <condition> } | { { dst-address | src-address } { { <operator> { <ip_address> | <ip_address/mask> } } | { !range | range } host-pool <host_pool_name> } | protocol { { <operator> { <protocol> | <protocol_assignment> } } | { <operator> <protocol_assignment> } }
> tcp { any-match <operator> <condition> | { { dst-port | either-port | src-port } { { <operator> <port_number> } | { !range | range } { <start_range> to <end_range> | port-map <port_map_name> } } }
> udp { any-match <operator> <condition> | { dst-port | either-port | src-port } { <operator> <port_number> | { !range | range } { <start_range> to <end_range> | port-map <port_map_name> } } }
> create-log-record
> end
> Notes:

> • | If the source IP address is not configured, then it is treated as any source IP.

> • | If the destination IP address is not configured, then it is treated as any destination IP.

> • | If the source port number is not configured, then it is treated as any source port.

> • | If the destination port is not configured, then it is treated as any destination port.

> • | If no protocol is specified then it is treated as any protocol.

> • | If both uplink and downlink fields are not configured, then the rule will be treated as either direction, i.e. packets from any direction will match that rule.

> • | Configuring access ruledefs involves the creation of several ruledefs with different sets of rules and parameters. When an access ruledef is created, the CLI mode changes to the Firewall Ruledef Configuration Mode. For more information, see the Firewall Ruledef Configuration Mode Commands chapter of the Command Line Interface Reference.

> Configuring Firewall-and-NAT Policies
> To create and configure a Firewall-and-NAT Policy, use the following configuration:
> configure
> active-charging service <ecs_service_name>
> fw-and-nat policy <fw_nat_policy_name> [ -noconfirm ]
> firewall policy firewall-required
> access-rule priority <priority> { [ dynamic-only | static-and-dynamic ] access-ruledef <access_ruledef_name> { deny [ charging-action <charging_action_name> ] | permit [ trigger open-port { <port_number> | range <start_port> to <end_port> } direction { both | reverse | same } ] }
> access-rule no-ruledef-matches { downlink | uplink } action { deny [ charging-action <charging_action_name> ] | permit }
> end
> Notes:

> • | The access-rule no-ruledef-matches CLI command configures the default action on packets with no access ruledef matches. Rule matching is done for the first packet of a flow. Only when no rules match, the access-rule no-ruledef-matches configuration is considered. The default settings for uplink direction is “permit”, and for downlink direction “deny”.

> Configuring Protection from DoS and Other Attacks
> To configure protection from DoS and other attacks, use the following configuration:
> configure
> active-charging service <ecs_service_name>
> firewall port-scan { connection-attempt-success-percentage { non-scanner | scanner } <percentage> | inactivity-timeout <inactivity_timeout> | protocol { tcp | udp } response-timeout <response_timeout> | scanner-policy { block inactivity-timeout <inactivity_timeout> | log-only } }
> idle-timeout { icmp | tcp | udp } <idle_timeout>
> rulebase <rulebase_name>
> flow limit-across-applications { <limit> | non-tcp <limit> | tcp <limit> }
> icmp req-threshold <req_threshold>
> exit
> fw-and-nat policy <fw_nat_policy_name>
> firewall dos-protection { all | flooding { icmp | tcp-syn | udp } | ftp-bounce | ip-unaligned-timestamp | mime-flood | port-scan | source-router | tcp-window-containment | teardrop | winnuke }
> firewall flooding { { protocol { icmp | tcp-syn | udp } packet limit <packets> } | { sampling-interval <sampling_interval> } }
> firewall icmp-checksum-error { drop | permit }
> firewall icmp-destination-unreachable-message-threshold <messages> then-block-server
> firewall icmp-fsm
> firewall ip-reassembly-failure { drop | permit }
> firewall malformed-packets { drop | permit }
> firewall max-ip-packet-size <max_packet_size> protocol { icmp | non-icmp }
> firewall mime-flood { http-headers-limit <max_limit> | max-http-header-field-size <max_size> }
> firewall tcp-checksum-error { drop | permit }
> firewall tcp-fsm [ first-packet-non-syn { drop | permit | send-reset } ]
> firewall tcp-idle-timeout-action { drop | reset }
> firewall tcp-options-error { drop | permit }
> firewall tcp-reset-message-threshold <messages> then-block-server
> firewall tcp-syn-flood-intercept { mode { none | watch [ aggressive ] } | watch-timeout <intercept_watch_timeout> }
> firewall tcp-syn-with-ecn-cwr { drop | permit }
> firewall udp-checksum-error { drop | permit }
> firewall validate-ip-options
> end
> Notes:

> • | The firewall port-scan CLI command in the Active Charging Service Configuration Mode configures protection from port scanning.

> • | The idle-timeout { icmp | tcp | udp } <idle_timeout_duration> CLI command in the Active Charging Service Configuration Mode configures Stateful Firewall idle timeout settings.

> • | The flow limit-across-applications { <limit> | non-tcp <limit> | tcp <limit> } CLI command in the Rulebase Configuration Mode configures the maximum number of simultaneous flows per subscriber/APN sent to a rulebase regardless of the flow type, or limits flows based on the protocol type.

> • | The icmp req-threshold <req_threshold> CLI command Rulebase Configuration Mode configures the maximum number of outstanding ICMP requests to store for ICMP reply matching. Stateful Firewall will drop the ICMP replies if it does not have any information about ICMP requests.

> • | The firewall dos-protection CLI command configures Stateful Firewall protection for subscribers from Denial-of-Service (DoS) attacks. Note that the following DoS attacks are only detected in the downlink direction: flooding, ftp-bounce, ip-unaligned-timestamp, mime-flood, port-scan, source-router, tcp-window-containment, teardrop, winnuke.

> • | The firewall flooding CLI command configures Stateful Firewall protection from packet flooding attacks.

> • | The firewall icmp-checksum-error { drop | permit } CLI command configures Stateful Firewall action on packets with ICMP Checksum errors.

> • | The firewall icmp-destination-unreachable-message-threshold <messages> then-block-server CLI command configures the threshold on the number of ICMP error messages sent by subscribers for a particular data flow.

> • | The firewall icmp-fsm CLI command enables Stateful Firewall’s ICMP Finite State Machine (FSM).

> • | The firewall ip-reassembly-failure { drop | permit } CLI command configures Stateful Firewall action on packets involved in IP Reassembly Failure scenarios.

> • | The firewall malformed-packets { drop | permit } CLI command configures Stateful Firewall action on malformed packets.

> • | The firewall max-ip-packet-size <packet_size> protocol { icmp | non-icmp } CLI command configures the maximum IP packet size (after IP reassembly) that Stateful Firewall will permit to prevent packet flooding attacks.

> • | The firewall mime-flood CLI command configures the maximum number of headers allowed in an HTTP packet, and the maximum header field size allowed in the HTTP header to prevent MIME flooding attacks. This command is only effective if DoS protection for MIME flood attacks has been enabled using the firewall dos-protection mime-flood command, and the route command has been configured to send HTTP packets to the HTTP analyzer.

> • | The firewall tcp-checksum-error { drop | permit } CLI command configures Stateful Firewall action on packets with TCP Checksum errors.

> • | The firewall tcp-fsm [ first-packet-non-syn { drop | permit | send-reset } ] CLI command enables Stateful Firewall’s TCP Finite State Machine (FSM).

> • | The firewall tcp-idle-timeout-action { drop | reset } CLI command configures action to take on TCP idle timeout expiry.

> • | The firewall tcp-options-error { drop | permit } CLI command configures Stateful Firewall action on packets with TCP Option errors.

> • | The firewall tcp-reset-message-threshold <messages> then-block-server CLI command configures the threshold on the number of TCP reset messages sent by the subscriber for a particular data flow.

> • | The firewall tcp-syn-flood-intercept CLI command configures the TCP intercept parameters to prevent TCP-SYN flooding attacks by intercepting and validating TCP connection requests for DoS protection mechanism configured with the firewall dos-protection command.

> • | The firewall tcp-syn-with-ecn-cwr { drop | permit } CLI command configures Stateful Firewall action on TCP SYN packets with either ECN or CWR flag set.

> • | The firewall udp-checksum-error { drop | permit } CLI command configures Stateful Firewall action on packets with UDP Checksum errors.

> • | The firewall validate-ip-options CLI command enables the Stateful Firewall validation of IP options for errors. When enabled, Stateful Firewall will drop packets with IP Option errors.

> Configuring Maximum Number of Servers to Track for DoS Attacks
> To configure the maximum number of server IPs to be tracked for involvement in any kind of DoS attacks, use the following configuration:
> configure
> active-charging service <ecs_service_name>
> firewall track-list attacking-servers <no_of_servers>
> end
> Configuring Action on Packets Dropped by Stateful Firewall
> To configure the accounting action on packets dropped by Stateful Firewall due to any error, use the following configuration:
> configure
> active-charging service <ecs_service_name>
> rulebase <rulebase_name>
> flow any-error charging-action <charging_action_name>
> end
> Notes:

> • | For a packet dropped due to any error condition after data session is created, the charging action applied is the one configured in the flow any-error charging-action command. Whereas, for a packet dropped due to access ruledef match or no match (first packet of a flow), the charging action applied is the one configured in the access-rule priority or in the access-rule no-ruledef-matches command respectively.

> Configuring Dynamic Pinholes/ALGs
> This section describes how to configure routing rules to open up dynamic pinholes for ALG functionality.
> This section covers the following topics:

> • | Creating Routing Ruledefs

> • | Configuring Routing Ruledefs in the Rulebase

> Creating Routing Ruledefs
> To configure routing rules for FTP, SIP, and RTSP protocols use the following configuration:
> configure
> active-charging service <ecs_service_name>
> ruledef <ruledef_name>
> tcp either-port <operator> <value>
> rule-application routing
> end
> Notes:

> • | Create a separate ruledef for each protocol.

> Configuring Routing Ruledefs in the Rulebase
> To configure the routing ruledefs in the rulebase use the following configuration:
> configure
> active-charging service <ecs_service_name>
> rulebase <rulebase_name>
> route priority <priority> ruledef <ruledef_name> analyzer { ftp-control | rtsp } [ description <description> ]
> rtp dynamic-flow-detection
> end
> Notes:

> • | Add each ruledef as a separate route priority.

> • | For RTSP ALG to work, in the rulebase, the rtp dynamic-flow-detection command must be configured.

> Enabling Stateful Firewall Support for APN/Subscribers
> This section describes how to enable Stateful Firewall support for APN/subscribers.
> This section covers the following topics:

> • | Enabling Firewall for APN

> • | Enabling Firewall for Subscribers

> Enabling Stateful Firewall for APN
> To configure the Firewall-and-NAT Policy in an APN use the following configuration:
> configure
> context <context_name>
> apn <apn_name>
> fw-and-nat policy <fw_nat_policy_name>
> end
> Notes:

> • | To specify that the default Firewall-and-NAT policy configured in the rulebase be used for subscribers who use this APN, in the APN Configuration Mode, apply the following command: default fw-and-nat policy

> Enabling Stateful Firewall for Subscribers
> To configure the Firewall-and-NAT Policy in a subscriber template use the following configuration:
> configure
> context <context_name>
> subscriber default
> fw-and-nat policy <fw_nat_policy_name>
> end
> Notes:

> • | To specify that the default Firewall-and-NAT policy configured in the rulebase be used for subscribers, in the Subscriber Configuration Mode, apply the following command: default fw-and-nat policy

> Configuring Default Firewall-and-NAT Policy
> This is an optional configuration to specify a default Firewall-and-NAT policy to use if in the APN/subscriber configurations the following command is configured:
> default fw-and-nat policy
> To configure the default Firewall-and-NAT policy, use the following configuration:
> configure
> active-charging service <ecs_service_name>
> rulebase <rulebase_name>
> fw-and-nat default-policy <fw_nat_policy_name>
> end
> Configuring Stateful Firewall Thresholds
> This section describes how to configure Stateful Firewall threshold limits and polling interval for DoS-attacks, dropped packets, deny rules, and no rules.
> This section covers the following topics:

> • | Enabling Thresholds

> • | Configuring Threshold Poll Interval

> • | Configuring Threshold Limits

> Enabling Thresholds
> To enable thresholds use the following configuration:
> configure
> threshold monitoring firewall
> end
> Configuring Threshold Poll Interval
> To configure threshold poll interval use the following configuration:
> configure
> threshold poll fw-deny-rule interval <poll_interval>
> threshold poll fw-dos-attack interval <poll_interval>
> threshold poll fw-drop-packet interval <poll_interval>
> threshold poll fw-no-rule interval <poll_interval>
> end
> Configuring Threshold Limits
> To configure threshold limits use the following configuration:
> configure
> threshold fw-deny-rule <high_thresh> [ clear <low_thresh> ]
> threshold fw-dos-attack <high_thresh> [ clear <low_thresh> ]
> threshold fw-drop-packet <high_thresh> [ clear <low_thresh> ]
> threshold fw-no-rule <high_thresh> [ clear <low_thresh> ]
> end
> Configuring Bulk Statistics Schema
> To configure bulk statistics schema for the Personal Stateful Firewall service use the following configuration:
> configure
> bulkstats mode
> context schema <schema_name> format <format_string>
> end
> Notes:

> • | For more information on format_string variable, see the Bulk Statistics Configuration Mode Commands chapter of the Command Line Interface Reference.

> • | To configure the various parameters for bulk statistics collection prior to configuring the commands in this section, see the Configuring and Maintaining Bulk Statistics chapter of the System Administration Guide.

> Configuring Flow Recovery
> To configure flow recovery parameters for Stateful Firewall flows, use the following configuration:
> configure
> active-charging service <ecs_service_name>
> firewall flow-recovery { downlink | uplink } [ timeout <timeout> ]
> end
> Optional Configurations
> This section describes optional administrative configurations.
> The following topics are covered in this section:

> • | Changing Stateful Firewall Policy in Mid-session

> • | Configuring Stateless Firewall

> Changing Stateful Firewall Policy in Mid-session
> To change the Firewall-and-NAT policy in mid-session, in the Exec mode, use the following configuration:
> update active-charging { switch-to-fw-and-nat-policy <fw_nat_policy_name> | switch-to-rulebase <rulebase_name> } { all | callid <call_id> | fw-and-nat-policy <fw_nat_policy_name> | imsi <imsi> | ip-address <ipv4_address> | msid <msid> | rulebase <rulebase_name> | username <user_name> } [ -noconfirm ]
> Notes:

> • | To be able to change the Firewall-and-NAT policy in mid session, Stateful Firewall must have been enabled for the subscriber in the APN/Subscriber template configuration, or in the rulebase (the default policy) during call setup.

> • | The above command takes effect only for current calls. For new calls, the RADIUS returned/APN/Subscriber template/rulebase configured policy is used.

> Configuring Stateless Firewall
> This section describes how to configure Stateless Firewall processing wherein stateful checks are disabled.
> To configure Stateless Firewall use the following configuration:
> configure
> active-charging service <ecs_service_name>
> fw-and-nat policy <fw_nat_policy_name>
> no firewall icmp-fsm
> no firewall tcp-fsm
> end
> Notes:

> • | The no firewall icmp-fsm CLI command disables Stateful Firewall’s ICMP Finite State Machine (FSM). When disabled, ICMP reply without corresponding requests, ICMP eror message without inner packet data session, and duplicate ICMP requests are allowed by the firewall.

> • | The no firewall tcp-fsm CLI command disables Stateful Firewall’s TCP Finite State Machine (FSM). When disabled, only packet header check is done; there will be no FSM checks, sequence number validations, or port scan checks done.

> Saving the Configuration
> To save changes made to the system configuration, see the Verifying and Saving Your Configuration chapter.
> Gathering Stateful Firewall Statistics
> The following table lists commands to gather Stateful Firewall statistics.
> Important: For more information on these commands, see the Exec Mode Commands chapter of the Command Line Interface Reference.
> Gathering Stateful Firewall Statistics

> Statistics | Command | Information to Look For
> Firewall-and-NAT Policy statistics. | show active-charging fw-and-nat policy statistics all | The output displays statistics for all Firewall-and-NAT policies.
> | show active-charging fw-and-nat policy statistics name <fw_nat_policy_name> | The output displays statistics for the specified Firewall-and-NAT policy.
> Firewall-and-NAT Policy information. | show active-charging fw-and-nat policy all | The output displays information for all Firewall-and-NAT policies.
> | show active-charging fw-and-nat policy name <fw_nat_policy_name> | The output displays information for the specified Firewall-and-NAT policy.
> Flow related statistics on a chassis. | show active-charging flows all | The output displays statistics for all flows for subscriber session in a system/service.
> Detailed disconnect reasons for session flow. | show session disconnect-reasons [ verbose ] | The output of this command displays the disconnect reasons for flows of a subscriber session in a system/service.
> Detailed statistics of Stateful Firewall service. | show active-charging firewall statistics | The output displays detailed Stateful Firewall statistics.
> Detailed statistics of rulebases. | show active-charging rulebase statistics | The output displays detailed statistics of rulebases in a service.
> Detailed statistics of all ruledefs. | show active-charging ruledef statistics | The output displays detailed statistics of all ruledefs configured in the ECS service.
> Detailed statistics of all charging ruledefs. | show active-charging ruledef statistics all charging | The output displays detailed statistics of all charging ruledefs configured in the ECS service.
> Detailed statistics of all access ruledefs. | show active-charging ruledef statistics all firewall [ wide ] | The output displays detailed statistics of all access ruledefs configured in the ECS service.

> Managing Your Configuration
> This section explains how to review the Personal Stateful Firewall configurations after saving them in a .cfg file as described in the Verifying and Saving Your Configuration chapter, and also to retrieve errors and warnings with in an active configuration for a service.
> Output descriptions for most of these commands are available in the Command Line Interface Reference.
> System Status and Personal Stateful Firewall Service Monitoring Commands

> To do this: | Enter this command:
> View Administrative Information
> View current administrative user access
> View a list of all administrative users currently logged on to the system | show administrators
> View the context in which the administrative user is working, the IP address from which the administrative user is accessing the CLI, and a system generated ID number | show administrators session id
> View information pertaining to local-user administrative accounts configured for the system | show local-user verbose
> View statistics for local-user administrative accounts | show local-user statistics verbose
> View information pertaining to your CLI session | show cli
> Determining the System’s Uptime
> View the system’s uptime (time since last reboot) | show system uptime
> View Status of Configured NTP Servers
> View status of the configured NTP servers | show ntp status
> View System Alarm Status
> View the status of the system’s outstanding alarms | show alarm outstanding all
> View detailed information about all currently outstanding alarms | show alarm outstanding all verbose
> View system alarm statistics | show alarm statistics
> View Subscriber Configuration Information
> View locally configured subscriber profile settings (must be in context where subscriber resides) | show subscribers configuration username <user_name>
> View Subscriber Information
> View a list of subscribers currently accessing the system | show subscribers all
> View information for a specific subscriber | show subscribers full username <user_name>
> View Personal Stateful Firewall Related Information
> View System Configuration
> View the configuration of a context | show configuration context <context_name>
> View configuration errors for Active Charging Service/Stateful Firewall Service | show configuration errors section active-charging [ verbose ] [ | { grep <grep_options> | more } ]show configuration errors verbose
> View Personal Stateful Firewall Configuration
> View Personal Stateful Firewall configurations | show configuration | grep Firewall
> View access policy association with subscriber | show subscribers all | grep Firewall show apn all | grep Firewall
> View Stateful Firewall policy status for specific subscriber/APN | show subscribers configuration username <user_name> | grep Firewall show apn name <apn_name> | grep Firewall
> View all access ruledefs | show active-charging ruledef firewall
> View specific access ruledef | show active-charging ruledef name <access_rule_name>
> View which DoS attack prevention is enabled | show configuration verbose | grep dos
> View attack statistics | show active-charging firewall statistics verbose
> View ruledef action properties, checksum verification status, etc | show active-charging rulebase name <rulebase_name>
> View session disconnect reasons | show session disconnect-reasons [ verbose ]
> View information of sessions with Stateful Firewall processing required or not required as specified. | show active-charging sessions firewall { not-required | required }
> View information of subscribers for whom Stateful Firewall processing is required or not required as specified. | show subscribers firewall { not-required | required }
> View the list of servers being tracked for involvement in any DoS attacks. | show active-charging firewall track-list attacking-servers

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