openstack/openstack-manuals
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91340baf0c
openstack-manuals/doc/common/section_cli_nova_secgroups.xml
Christian Berendt 15ceb92a08 fixed typos found by RETF in common directory 
Just wrote a script like Topy using the RETF rules provided by
Wikipedia. A first test run on the common directory found some
more typos.

The script is available at the following URL at the moment.

https://gist.github.com/berendt/5ae38f2f1d5bd6b883d3

Also updated to active voice and changed <itemizedlist>
to <variablelist>. Removed "In order to" (useless phrase).

Change-Id: I4ecb1927e8291029db9bc0d743a3061138b974c8
2014-05-02 11:46:19 -05:00

246 lines
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<?xml version="1.0" encoding="UTF-8"?>
<section xmlns="http://docbook.org/ns/docbook"
xmlns:xi="http://www.w3.org/2001/XInclude"
xmlns:xlink="http://www.w3.org/1999/xlink" version="5.0"
xml:id="nova_cli_security_groups">
<title>Add security group and rules</title>
<para>The following procedure shows you how to add security groups
and add rules to the default security group.</para>
<section xml:id="secgroup_add-delete">
<title>Add or delete a security group</title>
<para>Use the <command>nova secgroup-create</command> command
to add security groups.</para>
<para>The following example shows how to create the
<literal>secure1</literal> security group:</para>
<screen><prompt>$</prompt> <userinput>nova secgroup-create secure1 "Test security group"</userinput>
<computeroutput>+---------+---------------------+
| Name | Description |
+---------+---------------------+
| secure1 | Test security group |
+---------+---------------------+</computeroutput></screen>
<para>After you create the security group, you can view it in
the security group list:</para>
<screen><prompt>$</prompt> <userinput>nova secgroup-list</userinput>
<computeroutput>+---------+---------------------+
| Name | Description |
+---------+---------------------+
| default | default |
| secure1 | Test security group |
+---------+---------------------+</computeroutput></screen>
<para>Use the <command>nova secgroup-delete</command> command
to delete security groups. You cannot delete the default
security group. The default security group has these
initial settings:</para>
<itemizedlist>
<listitem>
<para>All the traffic originated by the instances
(outbound traffic) is allowed</para>
</listitem>
<listitem>
<para>All the traffic destined to instances (inbound
traffic) is denied</para>
</listitem>
<listitem>
<para>All the instances inside the group are allowed
to talk to each other</para>
</listitem>
</itemizedlist>
<note>
<para>You can add extra rules into the default security
group for handling the egress traffic. Rules are
ingress only at this time.</para>
</note>
<para>The following example deletes the
<literal>secure1</literal> group. When you view the
security group list, it no longer appears:</para>
<screen><prompt>$</prompt> <userinput>nova secgroup-delete secure1</userinput>
<prompt>$</prompt> <userinput>nova secgroup-list</userinput>
<computeroutput>+---------+-------------+
| Name | Description |
+---------+-------------+
| default | default |
+---------+-------------+</computeroutput></screen>
</section>
<section xml:id="secgroup_rules">
<title>Modify security group rules</title>
<para>The security group rules control the incoming traffic
that can access the instances in the group, while all
outbound traffic is automatically allowed. <note>
<para>You cannot change the default outbound
behavior.</para>
</note>Every security group rule is a policy that allows
you to specify inbound connections that can access the
instance by source address, destination port, and IP
protocol (TCP, UDP or ICMP). Currently, you cannot manage
ipv6 and other protocols through the security rules,
making them permitted by default. To manage such
protocols, you can deploy a firewall in front of your
OpenStack cloud to control other types of traffic. The
command requires the following arguments for both TCP and
UDP rules:</para>
<variablelist wordsize="10">
<varlistentry>
<term><emphasis role="bold"
>&lt;secgroup&gt;</emphasis></term>
<listitem>
<para>ID of security group.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold"
>&lt;ip_proto&gt;</emphasis></term>
<listitem>
<para>IP protocol (icmp, tcp, udp).</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold"
>&lt;from_port&gt;</emphasis></term>
<listitem>
<para>Port at start of range.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold"
>&lt;to_port&gt;</emphasis></term>
<listitem>
<para>Port at end of range.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold"
>&lt;cidr&gt;</emphasis></term>
<listitem>
<para>CIDR for address range.</para>
</listitem>
</varlistentry>
</variablelist>
<para>For ICMP rules, instead of specifying a begin and end
port, you specify the allowed ICMP code and ICMP
type:</para>
<variablelist wordsize="10">
<varlistentry>
<term><emphasis role="bold"
>&lt;secgroup&gt;</emphasis></term>
<listitem>
<para>ID of security group.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold"
>&lt;ip_proto&gt;</emphasis></term>
<listitem>
<para>IP protocol (with icmp specified).</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold"
>&lt;ICMP_code&gt;</emphasis></term>
<listitem>
<para>The ICMP code.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold"
>&lt;ICMP_type&gt;</emphasis></term>
<listitem>
<para>The ICMP type.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold"
>&lt;cidr&gt;</emphasis></term>
<listitem>
<para>CIDR for the source address range.</para>
</listitem>
</varlistentry>
</variablelist>
<note>
<para>Entering <literal>-1</literal> for both code and
type indicates that all ICMP codes and types are
allowed.</para>
</note>
<note>
<title>The CIDR notation</title>
<para>That notation allows you to specify a base IP
address and a suffix that designates the number of
significant bits in the IP address used to identify
the network. For example, by specifying a
<literal>88.170.60.32/27</literal>, you specify
<literal>88.170.60.32</literal> as the <emphasis
role="bold">base IP</emphasis> and
<literal>27</literal> as the <emphasis role="bold"
>suffix</emphasis>. Because you use an IPV4
format, only 5 bits are available for the host part
(32 minus 27). The <literal>0.0.0.0/0</literal>
notation means you allow the entire IPV4 range, which
allows all addresses.</para>
</note>
<para>For example, to allow any IP address to access a web
server running on one of your instances inside the default
security group:</para>
<screen><prompt>$</prompt> <userinput>nova secgroup-add-rule default tcp 80 80 0.0.0.0/0</userinput>
<computeroutput>+-------------+-----------+---------+-----------+--------------+
| IP Protocol | From Port | To Port | IP Range | Source Group |
+-------------+-----------+---------+-----------+--------------+
| tcp | 80 | 80 | 0.0.0.0/0 | |
+-------------+-----------+---------+-----------+--------------+</computeroutput></screen>
<para>To allow any IP address to ping an instance inside the
default security group (Code 0, Type 8 for the ECHO
request):</para>
<screen><prompt>$</prompt> <userinput>nova secgroup-add-rule default icmp 0 8 0.0.0.0/0</userinput>
<computeroutput>+-------------+-----------+---------+-----------+--------------+
| IP Protocol | From Port | To Port | IP Range | Source Group |
+-------------+-----------+---------+-----------+--------------+
| icmp | 0 | 8 | 0.0.0.0/0 | |
+-------------+-----------+---------+-----------+--------------+</computeroutput></screen>
<screen><prompt>$</prompt> <userinput>nova secgroup-list-rules default</userinput>
<computeroutput>+-------------+-----------+---------+-----------+--------------+
| IP Protocol | From Port | To Port | IP Range | Source Group |
+-------------+-----------+---------+-----------+--------------+
| tcp | 80 | 80 | 0.0.0.0/0 | |
| icmp | 0 | 8 | 0.0.0.0/0 | |
+-------------+-----------+---------+-----------+--------------+</computeroutput></screen>
<para>To delete a rule, you must specify exactly the same
arguments that you used to create it:</para>
<variablelist wordsize="10">
<varlistentry>
<term><emphasis role="bold"
>&lt;secgroup&gt;</emphasis></term>
<listitem>
<para>ID of security group.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold"
>&lt;ip_proto&gt;</emphasis></term>
<listitem>
<para>IP protocol (icmp, tcp, udp).</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold"
>&lt;from_port&gt;</emphasis></term>
<listitem>
<para>Port at start of range.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold"
>&lt;to_port&gt;</emphasis></term>
<listitem>
<para>Port at end of range.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold"
>&lt;cidr&gt;</emphasis></term>
<listitem>
<para>CIDR for address range.</para>
</listitem>
</varlistentry>
</variablelist>
<screen><prompt>$</prompt> <userinput>nova secgroup-delete-rule default tcp 80 80 0.0.0.0/0</userinput></screen>
</section>
</section>
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