Monday, August 20, 2018

UK - Has any of your IPSec tunnels gone down over the weekend?

I have an IPSec tunnel connecting two sites (one in Scotland, one in the north of the UK) which has been running fine for over 24 months. Since ~3pm GMT yesterday, the tunnel has dropped with phase 1 unable to establish. One side ISP is BT, other is Zen. Obviously, there has been no changes to the policies and both gateways are reachable on their respective management IP's. Neither ISP have yet admitted to any service changes over the weekend.



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