Hello,   This is a feature of networking in Windows, confirmed by Microsoft   As a workaround they suggest to update router firmware:   Here goes Microsoft answer on the topic: • Symptom - Kaspersky Labs has a firewall product (Kaspersky Internet Security) that uses a WFP based callout driver to re-inject pended authorization request out of band. When this callout injects ICMP V6 datagrams, an additional option is added to the IPV6 header (Router Alert). The problem is some his