Fortigate IPS and DoS

-

 1.Expoit
   Known, confirmed attack, detected by signature
              IPS signature
              WAF signature
               Antivirus signature
   example: Explot to known application vulnerabilities                 

2 .Anomaly
    Zero-day or DoS attach
    Detected by behavioral analysis
            Rate-based IPS signature
            DoS policies
            Protocol constraints inspection
    example: high rate traffic (DoS/Flood)

3. IPS components
     IPS signature databases
     Protocol decoders
     IPS Engine  - app control, antivirus, web filter, email filter, DLP

4. IPS license.




5. Regular and Extended signature database.

6. IPS profile

Add individual signature or use filter


































7. IPS signature -- Hold time

config system ips
    set signature-hold-time 0h
end

8. Add signature with CVE number via CLI

9: DoS
    Policy & Object > IPv4 DoS Policy
        TCP SYN flood  -- incomplete connection requests
        ICMP sweep
        TCP port scan

10. Web Application Firewall (WAF)
      Turn on  in Feature Visibility
      only in Proxy-base policy

11. Troubleshooting














12. Fail open
config ips global|
    set fail-open <enable | disable>



Comments

Post a Comment

Popular posts from this blog

Firepower FMC and FTD troubleshooting

-
 1. Display real time log on FMC or FTD: pigtail for example: pigtail | grep 192.168.2.20                      pigtail | grep sftunnel 2. Restart communication channel manage_procs.pl run it from  the sensor only, run it from FMC will reset all sensors' channel. This scripts are nice to be used when the FMC and FTD have communication problems like heartbeats are not received, policy deployment is failing or events are not received > expert ************************************************************** NOTICE - Shell access will be deprecated in future releases          and will be replaced with a separate expert mode CLI. ************************************************************** admin@FTD:~$ sudo su Password: root@FTD:/home/admin# manage_procs.pl ****************  Configuration Utility  **************  1   Reconfigure Correlator  2   Reconfigure and flush Correlator  3    Restart Comm. channel  4   Update routes  5   Reset all routes  6   Validate Network  0   Exit *****
Read more

Firepower 2100/1100 FTD/ASA initial setup, reimage, upgrade.

-
  Chassis FXOS and FTD share same management IP (default 192.168.45.45) Chassis FXOS (192.168.45.45) and ASA ()use different management IP although on same physical interface. SSH to FXOS/FTD are on FTD CLI prompt, go to FXOS using the  connect fxos  command Console to Chassis is on FXOS CLI prompt, go to FTD using the  connect ftd  command The Firepower 1100 does not support the FXOS Firepower Chassis Manager; only a limited CLI is supported for troubleshooting purposes. The Firepower 2100 runs an underlying operating system called the Firepower eXtensible Operating System (FXOS).  If you run ASA on Firepower 2100, ASA can be in the following modes: Appliance mode (the default after ASA 9.13)—Appliance mode lets you configure all settings in the ASA. Only advanced troubleshooting commands are available from the FXOS CLI. See the  FXOS troubleshooting guide  for more information. Firepower Chassis Manager is not supported . ciscoasa# connect fxos [admin] Connecting to fxos. Connected
Read more

ASA IKEv1 VPN troubleshooting Steps and Tips

-
  1. Phase I proposal mismatch  Run show crypto isakmp sa  Initiator: MM_WAIT_MSG2 Responder: No info  Most likely this is phase1 proposal mismatch, verify IKEv1 policy, other symptoms:   Initiator log: Information Exchange processing failed All configured IKE versions failed to establish the tunnel Initiator debug: Received an un-encrypted NO_PROPOSAL_CHOSEN notify message, dropping Responder log: Error processing payload: Payload ID Responder debug:  All SA proposals found unacceptable 2. IKE version mismatch:  Run  show crypto isakmp sa  no info at both initiator and responder Initiator log: Removing peer from correlator table failed, no match! Reason: User Requested  All configured IKE versions failed to establish the tunnel Initiator debug: Oakley begin quick mode PHASE 1 COMPLETED IKE Initiator sending 1st QM pkt Removing peer from correlator table failed, no match! Session is being torn down. Reason: User Requested Responder log: Tunnel Rejected: Conflicting protocols specified
Read more