Some types of audit event samples from [our documentation](https://www.elastic.co/guide/en/elasticsearch/reference/7.17/audit-event-types.html) include the port number in "origin.address", like **access_denied**:
```json
{"type":"audit", "timestamp":"2020-12-30T22:30:06,949+0200", "node.id":
"0RMNyghkQYCc_gVd1G6tZQ", "event.type":"transport", "event.action":
"access_denied", "authentication.type":"REALM", "user.name":"user1",
"user.realm":"default_native", "user.roles":["test_role"], "origin.type":
"rest", "origin.address":"[::1]:52434", "request.id":"yKOgWn2CRQCKYgZRz3phJw",
"action":"indices:admin/auto_create", "request.name":"CreateIndexRequest",
"indices":["<index-{now/d+1d}>"]}
```
but other types like **connection_denied** from this issue does not include the port:

```json
{"type":"audit", "timestamp":"2020-12-30T21:47:31,526+0200", "node.id":
"0RMNyghkQYCc_gVd1G6tZQ", "event.type":"ip_filter", "event.action":
"connection_denied", "origin.type":"rest", "origin.address":"10.10.0.20",
"transport.profile":".http", "rule":"deny 10.10.0.0/16"}
```

I think we should be consistent here and always include the port number in the "origin.address" field.
x-pack/plugin/security/src/test/java/org/elasticsearch/xpack/security/audit/logfile/LoggingAuditTrailTests.java
Settings settings3 = Settings.builder()
            .putList(prefix + "ignore_filters.filter3.realms", Arrays.asList("native", "oidc1"))
            .putList(prefix + "ignore_filters.filter3.roles", Arrays.asList("kibana", "/wrong"))
            .build();
        assertThat(
            LoggingAuditTrail.FILTER_POLICY_IGNORE_REALMS.getConcreteSettingForNamespace("filter3").get(settings3),
            containsInAnyOrder("native", "oidc1")
        );
        e = expectThrows(
            IllegalArgumentException.class,
            () -> LoggingAuditTrail.FILTER_POLICY_IGNORE_ROLES.getConcreteSettingForNamespace("filter3").get(settings3)
        );
        assertThat(e, hasToString(containsString("invalid pattern [/wrong]")));
        Settings settings4 = Settings.builder()
            .putList(prefix + "ignore_filters.filter4.roles", Arrays.asList("kibana", "elastic"))
            .putList(prefix + "ignore_filters.filter4.indices", Arrays.asList("index-1", "/no-inspiration"))
            .build();
        assertThat(
            LoggingAuditTrail.FILTER_POLICY_IGNORE_ROLES.getConcreteSettingForNamespace("filter4").get(settings4),
            containsInAnyOrder("kibana", "elastic")
        );
        e = expectThrows(
            IllegalArgumentException.class,
            () -> LoggingAuditTrail.FILTER_POLICY_IGNORE_INDICES.getConcreteSettingForNamespace("filter4").get(settings4)
        );
        assertThat(e, hasToString(containsString("invalid pattern [/no-inspiration]")));
        Settings settings5 = Settings.builder()
            .putList(prefix + "ignore_filters.filter2.users", Arrays.asList("tom", "cruise"))
            .putList(prefix + "ignore_filters.filter2.actions", Arrays.asList("indices:data/read/*", "/foo"))
            .build();