Configuring Security Group Rules

Scenarios

• Inbound: Inbound rules allow external network traffic to be sent to the ECSs in the security group.
• Outbound: Outbound rules allow network traffic from the ECSs in the security group to be sent out of the security group.

Accessing the Security Group Page

1. Locate the row that contains the target ECS and choose More > Manage Network > Configure Security Group Rule in the Operation column.
2. In the displayed dialog box, click Manage Rule in the Operation column.

Adding Inbound Rules

1. On the Inbound Rules tab, click Add Rule.

   The Add Inbound Rule dialog box is displayed.

2. Configure required parameters.

   You can click to add more inbound rules.

   Table 1 Inbound rule parameter description

   Parameter	Description	Example Value
   Priority	The security group rule priority. The priority value ranges from 1 to 100. The default value is 1 and has the highest priority. The security group rule with a smaller value has a higher priority.	1
   Action	The value can be Allow or Deny. If the Action is set to Allow, traffic is allowed to access the cloud servers in the security group over specified ports. If the Action is set to Deny, traffic is denied to access the cloud servers in the security group over specified ports.	Allow
   Type	Source IP address version. You can select: IPv4 IPv6	IPv4
   Protocol & Port	The network protocol used to match traffic in a security group rule. The protocol can be All, TCP, UDP, GRE, or ICMP.	TCP
   	Destination port used to match traffic in a security group rule. The value can be from 1 to 65535. Inbound rules control incoming traffic over specific ports to instances in the security group.	22, 22-30
   Source	Source of the security group rule. The value can be an IP address, a security group, or an IP address group, to allow access from the IP addresses or the instances in the security group. IP address Single IP address: 192.168.10.10/32 (IPv4); 2002:50::44/128 (IPv6) All IP addresses: 0.0.0.0/0 (IPv4); ::/0 (IPv6) IP address range: 192.168.1.0/24 (IPv4); 2407:c080:802:469::/64 (IPv6) IP address group: ipGroup-A If the source is a security group, this rule will apply to all instances associated with the selected security group.	192.168.0.0/24
   Description	Supplementary information about the security group rule. This parameter is optional. The security group rule description can contain a maximum of 255 characters and cannot contain angle brackets (< or >).	N/A

3. Click OK.

   The inbound rule list is displayed.

Adding Outbound Rules

1. On the Outbound Rules tab, click Add Rule.

   The Add Outbound Rule dialog box is displayed.

2. Configure required parameters.

   You can click to add more outbound rules.

   Table 2 Outbound rule parameter description

   Parameter	Description	Example Value
   Priority	The security group rule priority. The priority value ranges from 1 to 100. The default value is 1 and has the highest priority. The security group rule with a smaller value has a higher priority.	1
   Action	The value can be Allow or Deny. If the Action is set to Allow, access from ECSs in the security group is allowed to the destination over specified ports. If the Action is set to Deny, access from ECSs in the security group is denied to the destination over specified ports.	Allow
   Type	Destination IP address version. You can select: IPv4 IPv6	IPv4
   Protocol & Port	The network protocol used to match traffic in a security group rule. The protocol can be All, TCP, UDP, GRE, or ICMP.	TCP
   	Destination port used to match traffic in a security group rule. The value can be from 1 to 65535. Outbound rules control outgoing traffic over specific ports from instances in the security group.	22, 22-30
   Destination	Destination of the security group rule. The value can be an IP address, a security group, or an IP address group, to allow access to the IP address or the instances in the security group. IP address Single IP address: 192.168.10.10/32 (IPv4); 2002:50::44/128 (IPv6) All IP addresses: 0.0.0.0/0 (IPv4); ::/0 (IPv6) IP address range: 192.168.1.0/24 (IPv4); 2407:c080:802:469::/64 (IPv6) IP address group: ipGroup-A	0.0.0.0/0
   Description	Supplementary information about the security group rule. This parameter is optional. The security group rule description can contain a maximum of 255 characters and cannot contain angle brackets (< or >).	N/A

3. Click OK.

   The outbound rule list is displayed.

Modifying Inbound Rules

1. Click the Inbound Rules tab.

   The security group rule list is displayed.

2. Locate the target rule and click Modify in the Operation column.
3. Modify the security group rules as needed.

   Table 3 Inbound rule parameter description

   Parameter	Description	Example Value
   Priority	The security group rule priority. The priority value ranges from 1 to 100. The default value is 1 and has the highest priority. The security group rule with a smaller value has a higher priority.	1
   Action	The value can be Allow or Deny. If the Action is set to Allow, traffic is allowed to access the cloud servers in the security group over specified ports. If the Action is set to Deny, traffic is denied to access the cloud servers in the security group over specified ports.	Allow
   Type	Source IP address version. You can select: IPv4 IPv6	IPv4
   Protocol & Port	The network protocol used to match traffic in a security group rule. The protocol can be All, TCP, UDP, GRE, or ICMP.	TCP
   	Destination port used to match traffic in a security group rule. The value can be from 1 to 65535. Inbound rules control incoming traffic over specific ports to instances in the security group.	22, 22-30
   Source	Source of the security group rule. The value can be an IP address, a security group, or an IP address group, to allow access from the IP addresses or the instances in the security group. IP address Single IP address: 192.168.10.10/32 (IPv4); 2002:50::44/128 (IPv6) All IP addresses: 0.0.0.0/0 (IPv4); ::/0 (IPv6) IP address range: 192.168.1.0/24 (IPv4); 2407:c080:802:469::/64 (IPv6) IP address group: ipGroup-A If the source is a security group, this rule will apply to all instances associated with the selected security group.	192.168.0.0/24
   Description	Supplementary information about the security group rule. This parameter is optional. The security group rule description can contain a maximum of 255 characters and cannot contain angle brackets (< or >).	N/A

4. Click Confirm.

Modifying Outbound Rules

1. Click the Outbound Rules tab.

   The security group rule list is displayed.

2. Locate the target rule and click Modify in the Operation column.
3. Modify the security group rules as needed.

   Table 4 Outbound rule parameter description

   Parameter	Description	Example Value
   Priority	The security group rule priority. The priority value ranges from 1 to 100. The default value is 1 and has the highest priority. The security group rule with a smaller value has a higher priority.	1
   Action	The value can be Allow or Deny. If the Action is set to Allow, access from ECSs in the security group is allowed to the destination over specified ports. If the Action is set to Deny, access from ECSs in the security group is denied to the destination over specified ports.	Allow
   Type	Destination IP address version. You can select: IPv4 IPv6	IPv4
   Protocol & Port	The network protocol used to match traffic in a security group rule. The protocol can be All, TCP, UDP, GRE, or ICMP.	TCP
   	Destination port used to match traffic in a security group rule. The value can be from 1 to 65535. Outbound rules control outgoing traffic over specific ports from instances in the security group.	22, 22-30
   Destination	Destination of the security group rule. The value can be an IP address, a security group, or an IP address group, to allow access to the IP address or the instances in the security group. IP address Single IP address: 192.168.10.10/32 (IPv4); 2002:50::44/128 (IPv6) All IP addresses: 0.0.0.0/0 (IPv4); ::/0 (IPv6) IP address range: 192.168.1.0/24 (IPv4); 2407:c080:802:469::/64 (IPv6) IP address group: ipGroup-A	0.0.0.0/0
   Description	Supplementary information about the security group rule. This parameter is optional. The security group rule description can contain a maximum of 255 characters and cannot contain angle brackets (< or >).	N/A

4. Click Confirm.