proftpd to replace vsftpd

I decided to replace vsftpd by proftpd. The reason is that proftpd can bypass reverse lookup of IP addresses to domain names with the directive of "UserReverseDNS off" in the config file. There are ISPs that have not properly given reverse hostnames to their IP addresses assigned to customers. In case of lookup failure, vsftpd will result in time out in the login process. I have tried to search if it is possible to disable reverse lookup in vsftpd but in vain. Obviously, proftpd is my choice in order to avoid the trouble of reverse lookup failure.