Hello!
LDDb runs on a single server fully accessible from anyone. That also means fully accessible by the wrong type of people trying to crash/hack/attack the server either for their own fun, to try to dump passwords or personal information, or to relay spam for profit.
They would find little data worthwhile of stealing here (passwords are one-way encrypted with random salt, no credit card/payment information, etc.) but once in a while I get flagged as a SPAM box because some email account got compromised -- usually my sister's -- and this blocks LDDb notifications from being accepted by ISPs until tings are cleaned up.
Until recently I would run both a static blacklist (lots of Ukrainian, Russian, Chinese, etc. IP blocks) + a Fail2ban automatic custom set of tight rules to keep bad guys out. Now I removed the static list but started logging the blocked IPs, along with the reason for it, in a database and will review from time to time which IPs are constantly coming back with the same pattern of attacks to indefinitely block them.
You can see what it looks like here with the currently blocked IPs showed on a Google map. Serious attacks will trigger a month of banning, medium risk attacks only one week, and potentially honest typos only a few minutes.
http://banhammer.lddb.com/Now, once in a while you might trigger one of the automated defenses by entering dubious information while using LDDb (broken URL, wrongly generated link, etc.). When that happens, you might check if the trouble you have accessing LDDb is due to a possible (false-positive) blacklisting by first finding what your potentially blocked public IP truly is:
https://www.whatismyip.com/Then, if you are able to access internet from another path (your mobile phone, office internet, etc.) just add this IP address to the Banhammer URL like this (ex: 1.2.3.4):
http://banhammer.lddb.com/1.2.3.4It will tell you if this IP is blocked and why. Then just contact me to ask for a review of the reasons you got blocked and a manual removal. Sometimes my filters are too strong, or new legit hits are created by browsers that didn't exist before. IExplorer or iOS are good at that kind of seemingly random hits that might be consider attacks.
Hope this will help you get back with us and hopefully also help me improve my filters!
Julien