I really don't think this is a centminmod problem, but I thought I'd post it here because bigger brains and all. I wrote a ForumBackup addon for XenForo that has an option to it to SFTP a local backup file to a remote server. It uses the phpssh2 library to accomplish this. It is a pretty simple step to provide a hostname, user, password, remote directoy, and the appropriate permissions for the remote file. One user of the SFTP process is seeing that recently (April 28th), their backups (compressed gzip files) were being transferred to the backup host (running centminmod), but that the file sizes on the remote backup server were less than the local server. Also, it appears that the transferred gzip files are corrupted, they won't decompress. So, the question is, why would those sftp transfers start failing on April 28th? Traditional SFTP transfers appears to work ok, but I'm going to try more testing with that. I've asked the user to see if there are any PHP warnings or errors on the web server side to indicate any type of transmission problem. The user has commented that PHP was upgraded to 5.6.8 on April 16th, so that could also be a factor. It appears that there might be a newer version of php-ssh2 to use (0.12.3) for the php 5.6 branch, but I'm not certain of that because PECL says that version 0.12 is for PHP version 6.0 and below, but it says that for all versions too, lol. I'm not sure how to pinpoint if that's the real problem or not. Would the centminmod server have any logs to look at, perhaps a ssh or sftp log? Would those entries be in /var/log/messages? On a related note, I've heard that the phpseclib might be a good alternative to phpssh2. I doubt if it would provide any answers to this problem, but was curious if anybody has used it.