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
if (rules.containsKey(profile) == false) {
            
            return true;
        }
        AuditTrail auditTrail = auditTrailService.get();
        for (SecurityIpFilterRule rule : rules.get(profile)) {
            if (rule.matches(peerAddress)) {
                boolean isAllowed = rule.ruleType() == IpFilterRuleType.ACCEPT;
                if (isAllowed) {
                    auditTrail.connectionGranted(peerAddress.getAddress(), profile, rule);
                } else {
                    auditTrail.connectionDenied(peerAddress.getAddress(), profile, rule);
                }
                return isAllowed;
            }
        }
        auditTrail.connectionGranted(peerAddress.getAddress(), profile, DEFAULT_PROFILE_ACCEPT_ALL);
        return true;
    }
    private synchronized void updateRules() {
        this.rules = parseSettings();
    }
    private Map<String, SecurityIpFilterRule[]> parseSettings() {
        if (isIpFilterEnabled || isHttpFilterEnabled) {
            Map<String, SecurityIpFilterRule[]> profileRules = new HashMap<>();
            if (isHttpFilterEnabled && boundHttpTransportAddress.get() != null) {
                TransportAddress[] localAddresses = boundHttpTransportAddress.get().boundAddresses();
                profileRules.put(HTTP_PROFILE_NAME, createRules(httpAllowFilter, httpDenyFilter, localAddresses));
            }
            if (isIpFilterEnabled && boundTransportAddress.get() != null) {