The extension saves only part of my list of IP addresses. What should I do?
All extension settings are stored in the standard Magento table core_coinfig_data. To be able to store more data than by default, you have to edit the structure of this table — change type of field value from text to longtext. You can use the following SQL query to do that
ALTER TABLE `core_config_data` CHANGE `value` `value` LONGTEXT CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT 'Config Value'