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/main/java/org/elasticsearch/xpack/security/transport/filter/IPFilter.java
}
        for (String value : deny) {
            rules.add(new SecurityIpFilterRule(false, value));
        }
        return rules.toArray(new SecurityIpFilterRule[rules.size()]);
    }
    public void setBoundTransportAddress(
        BoundTransportAddress boundTransportAddress,
        Map<String, BoundTransportAddress> profileBoundAddress
    ) {
        this.boundTransportAddress.set(boundTransportAddress);
        this.profileBoundAddress.set(profileBoundAddress);
        updateRules();
    }
    public void setBoundHttpTransportAddress(BoundTransportAddress boundHttpTransportAddress) {
        this.boundHttpTransportAddress.set(boundHttpTransportAddress);
        updateRules();
    }
    public static void addSettings(List<Setting<?>> settings) {
        settings.add(ALLOW_BOUND_ADDRESSES_SETTING);
        settings.add(IP_FILTER_ENABLED_SETTING);
        settings.add(IP_FILTER_ENABLED_HTTP_SETTING);
        settings.add(HTTP_FILTER_ALLOW_SETTING);
        settings.add(HTTP_FILTER_DENY_SETTING);
        settings.add(TRANSPORT_FILTER_ALLOW_SETTING);
        settings.add(TRANSPORT_FILTER_DENY_SETTING);
        settings.add(PROFILE_FILTER_ALLOW_SETTING);
        settings.add(PROFILE_FILTER_DENY_SETTING);
    }
    private static class IPFilterValidator implements Setting.Validator<List<String>> {