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| <section id="configure-acl"> |
| <title>Configuring Access Control List</title> |
| <para>Define Network Access Control List (ACL) on the VPC virtual router to control incoming |
| (ingress) and outgoing (egress) traffic between the VPC tiers, and the tiers and Internet. By |
| default, all incoming and outgoing traffic to the guest networks is blocked. To open the ports, |
| you must create a new network ACL. The network ACLs can be created for the tiers only if the |
| NetworkACL service is supported.</para> |
| <orderedlist> |
| <listitem> |
| <para>Log in to the &PRODUCT; UI as an administrator or end user.</para> |
| </listitem> |
| <listitem> |
| <para>In the left navigation, choose Network.</para> |
| </listitem> |
| <listitem> |
| <para>In the Select view, select VPC.</para> |
| <para>All the VPCs that you have created for the account is listed in the page.</para> |
| </listitem> |
| <listitem> |
| <para>Click the Settings icon.</para> |
| <para>The following options are displayed.</para> |
| <itemizedlist> |
| <listitem> |
| <para>IP Addresses</para> |
| </listitem> |
| <listitem> |
| <para>Gateways</para> |
| </listitem> |
| <listitem> |
| <para>Site-to-Site VPN</para> |
| </listitem> |
| <listitem> |
| <para>Network ACLs</para> |
| </listitem> |
| </itemizedlist> |
| </listitem> |
| <listitem> |
| <para>Select Network ACLs.</para> |
| <para>The Network ACLs page is displayed.</para> |
| </listitem> |
| <listitem> |
| <para>Click Add Network ACLs.</para> |
| <para>To add an ACL rule, fill in the following fields to specify what kind of network traffic |
| is allowed in this tier. </para> |
| <itemizedlist> |
| <listitem> |
| <para><emphasis role="bold">CIDR</emphasis>: The CIDR acts as the Source CIDR for the |
| Ingress rules, and Destination CIDR for the Egress rules. To accept traffic only from or |
| to the IP addresses within a particular address block, enter a CIDR or a comma-separated |
| list of CIDRs. The CIDR is the base IP address of the incoming traffic. For example, |
| 192.168.0.0/22. To allow all CIDRs, set to 0.0.0.0/0.</para> |
| </listitem> |
| <listitem> |
| <para><emphasis role="bold">Protocol</emphasis>: The networking protocol that sources use |
| to send traffic to the tier. The TCP and UDP protocols are typically used for data |
| exchange and end-user communications. The ICMP protocol is typically used to send error |
| messages or network monitoring data.</para> |
| </listitem> |
| <listitem> |
| <para><emphasis role="bold">Start Port</emphasis>, <emphasis role="bold">End |
| Port</emphasis> (TCP, UDP only): A range of listening ports that are the destination |
| for the incoming traffic. If you are opening a single port, use the same number in both |
| fields.</para> |
| </listitem> |
| <listitem> |
| <para><emphasis role="bold">Select Tier</emphasis>: Select the tier for which you want to |
| add this ACL rule.</para> |
| </listitem> |
| <listitem> |
| <para><emphasis role="bold">ICMP Type</emphasis>, <emphasis role="bold">ICMP |
| Code</emphasis> (ICMP only): The type of message and error code that will be |
| sent.</para> |
| </listitem> |
| <listitem> |
| <para><emphasis role="bold">Traffic Type</emphasis>: Select the traffic type you want to |
| apply. </para> |
| <itemizedlist> |
| <listitem> |
| <para><emphasis role="bold">Egress</emphasis>: To add an egress rule, select Egress |
| from the Traffic type drop-down box and click Add. This specifies what type of |
| traffic is allowed to be sent out of VM instances in this tier. If no egress rules |
| are specified, all traffic from the tier is allowed out at the VPC virtual router. |
| Once egress rules are specified, only the traffic specified in egress rules and the |
| responses to any traffic that has been allowed in through an ingress rule are |
| allowed out. No egress rule is required for the VMs in a tier to communicate with |
| each other.</para> |
| </listitem> |
| <listitem> |
| <para><emphasis role="bold">Ingress</emphasis>: To add an ingress rule, select Ingress |
| from the Traffic type drop-down box and click Add. This specifies what network |
| traffic is allowed into the VM instances in this tier. If no ingress rules are |
| specified, then no traffic will be allowed in, except for responses to any traffic |
| that has been allowed out through an egress rule.</para> |
| </listitem> |
| </itemizedlist> |
| <note> |
| <para>By default, all incoming and outgoing traffic to the guest networks is blocked. To |
| open the ports, create a new network ACL.</para> |
| </note> |
| </listitem> |
| </itemizedlist> |
| </listitem> |
| <listitem> |
| <para>Click Add. The ACL rule is added.</para> |
| <para>To view the list of ACL rules you have added, click the desired tier from the Network |
| ACLs page, then select the Network ACL tab.</para> |
| <mediaobject> |
| <imageobject> |
| <imagedata fileref="./images/network-acl.png"/> |
| </imageobject> |
| <textobject> |
| <phrase>network-acl.png: adding, editing, deleting an ACL rule.</phrase> |
| </textobject> |
| </mediaobject> |
| <para>You can edit the tags assigned to the ACL rules and delete the ACL rules you have |
| created. Click the appropriate button in the Actions column.</para> |
| </listitem> |
| </orderedlist> |
| </section> |