Since some time I use a geofence on my servers to ban all incoming requests that do not originate from DE. The company (Maxmind) that distributes up to date mappings from IP ranges to country codes (“geoip tables”) recently changed how they distribute these files. Now, you must have an account and license key to download the geoip tables. Note: everything is still free! The need for login credentials breaks the update mechanism for geoip tables which typically uses xt_geoip_dl. Read more

Last year in June I set up geofence on my home server to ban all access not coming from DE. In January I noticed that things did not work anymore. A bit of research revealed, that the company that provides the needed GeoIP tables decided to stop shipping them in format A and only offered the tables in format B. So neither the script that downloads the tables (xt_geoip_dl) nor the script that converts the tables (xt_geoip_build) into the binary format that xt_geoip can digest to block connections attempts worked anymore. Read more

I recently noticed some odd HTTP requests on my web server, which I exclusively use for private purposes like hosting Nextcloud, GOGS, or Wallabag. I did a bit of research where these requests come from – just fire something like for elem in $(awk '{print $1 | "sort | uniq"}' /var/log/nginx/access.log); do curl ipinfo.io/$elem; done – and found out that they all originate from Russia, China or India. That sounds a bit suspicious to me. Read more