lftp vs Serv-U FTP Server

lftp is a free command-line file transfer program for Linux, with support for FTP, HTTP, FISH, SFTP, HTTPS, FTPS and BitTorrent. It can synchronize files, automate transfers and run queued jobs at set times. Its mirror command downloads or updates a directory tree; reverse mirror does the same by uploading to a server. Multiple files can transfer in parallel, and pget can use multiple connections for one download. lftp retries operations after non-fatal errors and can resume downloads from where they stopped. Unfinished jobs can continue in the background after you exit the program or close an xterm. FTPS and HTTPS rely on GNU TLS or OpenSSL, depending on how lftp was built. Downloads include source archives and Fedora RPM binaries. Release information differs across the project pages: the homepage lists 4.9.3, released on 2024-11-08, while the download page calls 4.9.2 the latest stable version. The author says they have little time to support lftp; the project lists two mailing lists.

Serv-U FTP Server provides FTP and FTPS file transfers for organizations, with web and mobile interfaces for viewing, uploading, and downloading files. The FTP Server edition supports IPv4 and IPv6; an edition comparison also lists HTTP. SSL/TLS encrypts transfers. Users can pause or resume multiple and large exchanges, including files larger than 3 GB. Administrators can create users and groups, manage permissions and bandwidth, and review transfer details in a management console. They can set transfer ratios and quotas, limit concurrent sessions, and use IP blocking, reverse DNS options, and anti-hammering controls. Automation can move or delete files after transfer, or disable or reset credentials after a specified number of days. The optional Serv-U Gateway is described as keeping data out of the DMZ and helping meet listed compliance requirements. SolarWinds positions this edition for small businesses and project teams with fewer users and domains on one server. It has no free plan; the listed price is $55 a month, billed annually, and a 14-day trial is available.