Querying Logs

CFW allows you to query logs generated within the last seven days. The following types of logs are available:

Attack event log: Events detected by attack defense functions, such as IPS, are recorded. You can modify the protection action if traffic is improperly blocked. For details, see Modifying the Protection Action of an Intrusion Prevention Rule. For details about how to modify the protection action of antivirus, see Modifying the Virus Defense Action for Better Protection Effect.
Access control logs: All traffic that matches the access control policies are recorded. For details about how to modify a protection rule, see Managing Protection Rules. For details about how to modify the blacklist or whitelist, see Editing the Blacklist or Whitelist.
Traffic logs: All traffic passing through the firewall is recorded.

One or multiple types of logs can be recorded in LTS. You can view log data in the past 1 to 365 days. For details, see Log Management.

Constraints

Logs can be stored for up to seven days.
For each type of logs, up to 1000 records can be viewed, and up to 100,000 records can be exported.
Traffic logs are collected based on sessions. Data about a connection is not reported until connection is terminated.

Checking Logs

Perform the following operations to view logs.

Attack Event Logs

Log in to the management console.
Click in the upper left corner of the management console and select a region or project.
In the navigation pane on the left, click and choose Security & Compliance > Cloud Firewall. The Dashboard page will be displayed.
(Optional) Switch to another firewall instance: Select a firewall from the drop-down list in the upper left corner of the page.

In the navigation pane, choose Log Audit > Log Query. The Attack Event Logs tab page is displayed. You can view details about attack events in the past week.

(Optional) Quickly filter log data. You can select what to include (default) or exclude (select Exclude) in the search criteria.

Figure 1 Attack event logs

**Table 1** Attack event log parameters
Parameter	Description
Time	Time when an attack occurred.
Attack Type	Type of the attack event, including IMAP, DNS, FTP, HTTP, POP3, TCP, and UDP.
Risk Level	It can be Critical, High, Medium, or Low.
Rule ID	Rule ID
Rule Name	Matched rule in the library.
Source IP Address	Source IP address of an attack event. If the source IP address is a WAF back-to-source IP address, Source IP Address displays the WAF back-to-source IP address and the real IP address. The first IP address corresponding to X-Forwarded-For is displayed in RealIP, that is, the real IP address of the client.
Tags	IP address type identifier. Other tags: IP addresses that are not WAF back-to-source IP addresses. No special actions required. WAF back-to-source IP addresses: Source IP Address is a WAF back-to-source IP address. If the Action of this record is Block, Block IP, or Discard, you need to manually set the action to Allow. Operation: Find the rule based on its ID. In the Operation column of the rule, click Observe.
Source Country/Region	Geographical location of the attack source IP address.
Source Port	Source port of an attack.
Destination IP Address	Attacked IP address.
Destination Country/Region	Geographical location of the attack target IP address.
Destination Port	Destination port of an attack.
Protocol	Protocol type of an attack.
Application	Application type of an attack.
Direction	It can be outbound or inbound.
Action	Action of the firewall. It can be: Allow Block Block IP Discard
Operation	You can click View to view the basic information and attack payload of an event.

Access Control Logs

Log in to the management console.
Click in the upper left corner of the management console and select a region or project.
In the navigation pane on the left, click and choose Security & Compliance > Cloud Firewall. The Dashboard page will be displayed.
(Optional) Switch to another firewall instance: Select a firewall from the drop-down list in the upper left corner of the page.

In the navigation pane, choose Log Audit > Log Query. Click the Access Control Logs tab and check the traffic details in the past week. For details about how to modify the action taken on an IP address, see Adding Protection Rules to Block or Allow Traffic or Adding Blacklist or Whitelist Items to Block or Allow Traffic.

(Optional) Quickly filter log data. You can select what to include (default) or exclude (select Exclude) in the search criteria.

Figure 2 Access control logs

**Table 2** Access control log parameters
Parameter	Description
Hit Time	Time of access.
Source IP Address	Source IP address of the access.
Source Country/Region	Geographical location of the source IP address.
Source Port	Source port for access control. It can be a single port or consecutive port groups (example: 80-443).
Destination IP Address	Destination IP address.
Destination Host	Destination domain name
Destination Country/Region	Geographical location of the destination IP address.
Destination Port	Destination port for access control. It can be a single port or consecutive port groups (example: 80-443).
Protocol	Protocol type for access control.
Action	Action taken on an event. It can be Observe, Block, or Allow.
Rule	Type of an access control rule. It can be a blacklist or whitelist.

Traffic Logs

Log in to the management console.
Click in the upper left corner of the management console and select a region or project.
In the navigation pane on the left, click and choose Security & Compliance > Cloud Firewall. The Dashboard page will be displayed.
(Optional) Switch to another firewall instance: Select a firewall from the drop-down list in the upper left corner of the page.

In the navigation pane, choose Log Audit > Log Query. Click the Traffic Log tab to view the number of traffic bytes and packets in the past week.

(Optional) Quickly filter log data. You can select what to include (default) or exclude (select Exclude) in the search criteria.

Figure 3 Traffic logs

**Table 3** Traffic log parameters
Parameter	Description
Start Time	Time when traffic protection started.
End Time	Time when traffic protection ended.
Source IP Address	Source IP address of the traffic
Source Country/Region	Geographical location of the access source IP address.
Source Port	Source port of the traffic.
Destination IP Address	Destination IP address.
Destination Country/Region	Geographical location of the destination IP address.
Destination Port	Destination port of the traffic.
Protocol	Protocol type of the traffic.
Stream Size	Total number of bytes of protected traffic.
Stream Packets	Total number of protected packets.

Related Operations

Exporting logs: Click in the upper right corner to export the logs in the list.

Follow-up Operations

If improper blocking is recorded in access control logs, check whether your protection rules, blacklist, and whitelist configurations are correct.
If improper blocking is recorded in attack event logs, your normal workloads may be blocked by IPS.
- If the traffic from an IP address is improperly blocked, add it to the whitelist.
- If the traffic from multiple IP addresses is blocked, check logs to see whether it is blocked by a single rule or multiple rules.
  - Blocked by a single rule: Modify the protection action of the rule. For details, see Modifying the Action of a Basic Protection Rule.
  - Blocked by multiple rules: Modify the protection mode. For details, see Adjusting the IPS Protection Mode to Block Network Attacks.