Just like any security minded organization, ISC have done our own emergency preparedness work. In situations where our main website cannot be accessed, we will be turning to alternative location (separate hosting location), iscems.dshield.org/index.txt 

We suggest you keep this page bookmarked and keep it handy just in case if anything ever happens. If we ever need to broadcast message from our alternative site, the messages would be PGP signed.

Let's hope we never need to use the alternative site...... But we are never really sure.