The Default Quarantine Firewall Policy contains added custom rules. The client does not honor these rules when Quarantined.
Release : 14.3 RU5
Component : Firewall
The SESC client uses the only the rules present by default in the Default Quarantine Firewall Policy. All other rules are ignored, which is by design.
In order to apply custom rules, use another Firewall policy. Alternatively, once the client is released from Quarantine, it can use any Firewall policy with custom rules.