Or at least re-enable in advance those if you call your ISP and complain about any connectivity issues. You're unlikely to know this, but some engineer will tha

Or at least re-enable in advance those if you call your ISP and complain about any connectivity issues. You're unlikely to know this, but some engineer will thank you in their mind. (I've used to work at ISP. ICMP echoes towards the customer's machine is a first step in diagnosing what could be wrong - and sometimes it really helps to get an image of what's going on. Sadly, a lot of machines do not respond to those.)