On 03/18/2012 02:08 PM, Timothy Murphy wrote: > Patrick Lists wrote: > >>> If there is a serious power failure, eg during an electric storm, >>> and the internet goes down >>> then my CentOS-6.2 server seems to take an inordinate time, maybe >>> forever, to get past fail2ban. >>> It is as though there is an extremely long - maybe an hour - timeout >>> if fail2ban cannot connect to the internet. >> >> Just a wild guess but could it be that fail2ban is trying to resolve all >> the IP addresses in it's database? Iirc there is a config option called >> use_dns. Try setting it to "no" or "warn". > > Thanks for the suggestion. > But I couldn't find any option like that anywhere below /etc/fail2ban > in fail2ban-0.8.4-28.el6 . More info on the wiki: http://www.fail2ban.org/wiki/index.php/Hostnames_or_IP_Addresses Regards, Patrick