- Primary server:
Server containingwebsite dataandmd5sumsand scriptp - website data:
anything stored at /var/www/html - backup server:
Server containing scripts - md5sums:
Contains md5sums of all files in website data - t:
monitor interval
- Start execution of
pfirst. psees no md5sums, ∴ generates one. (p is capable of generating md5sums)- Start execution of
s sconnects topssees no md5sums with itself, ∴ requests one.md5sumstransferredp⇨s- Wait for
tunits of time. presendsmd5sumstos-
- if new file received and all sums (except sums marked for change) in both files (old and new) match:
ALL OK.
Replace oldmd5sumswith new. - else:
- if new file received and all sums (except sums marked for change) in both files (old and new) match:
-
- if unauthorized change detected:
send emails, raise errors, evacuate city. - else:
Go to step 7
- if unauthorized change detected: