pod wrote:
Richard Hobbs richard.hobbs@crl.toshiba.co.uk writes:
- Once everything is working perfectly, send an email to the entire company instructing them what to do after the outage and arrange an outage and do the following steps as soon as the outage begins:
a. Unplug DMZ switch from firewall to make delivered mail wait atthe sender. [...] i. Plug DMZ switch back into firewall and begin monitoring exim logs to check that mail is being delivered.
If I'm not misunderstanding the steps between 19.a -- 19.i are going to be done while not network connected? I'd be slightly concerned that these steps may involve anything some that needs to do DNS lookups or the like at which point they may hit long(ish) timeouts or just fail completely.
Because the mail servers are in a DMZ, they have their own DNS running locally. Local DNS lookups, therefore, shouldn't be a problem.
Good point though, so thank you for that - i ought to adjust my instructions to include installation of the DNS service! lol
Thanks again, Richard.
-- Richard Hobbs (IT Specialist) Toshiba Research Europe Ltd. - Cambridge Research Laboratory Email: richard.hobbs@crl.toshiba.co.uk Web: http://www.toshiba-europe.com/research/ Tel: +44 1223 436999 Mobile: +44 7811 803377