In some cases there are not great alternatives that fit the needs. I have not found anything that matches LFTP Using the mirror subsystem with SFTP and connect

In some cases there are not great alternatives that fit the needs. I have not found anything that matches LFTP Using the mirror subsystem with SFTP and connecting to chroot SFTP servers. It replicates the behavior of rsync in a chroot SFTP-only environment. Only downside is that since there isn't a syncing daemon on the other side, directory enumeration is much slower. File transfers are exponentially faster however as it can do as many SFTP sessions as desired for batches of files or even one big file with the only limit being the bandwidth from client to server. For NGinx I have been able to make use of HAProxy and Apache just fine. Long ago Apache was slower than NGinx but ever since APR 1.7 and Apache 2.4 there are about the same performance wise. Some here don't like the configuration syntax but I am used to it.