Hi, Ludovic Courtès skribis: > + (when open-connection > + (let* ((sock (open-connection host port))) > + ;; Since 'session-set!' doesn't increase the revealed count of SOCK > + ;; (as of Guile-SSH 0.12.0), do it ourselves. > + (set-port-revealed! sock 1) > + (session-set! session 'fd sock))) The problem with this approach is that ‘open-connection’ is past the raw host name; aliases, proxy commands, etc. from ~/.ssh/config are ignored. So it cannot go in as is. :-/ What we need is Guile-SSH bindings for ‘ssh_get_fd’, which would allow us to get at the actual file descriptor after the connection has been opened, and to set TCP_NODELAY there: http://api.libssh.org/stable/group__libssh__session.html#gafe509fcea47714b5cd277d1e35e83276 It’s not 100% clear though if it returns that “right” FD when there’s a proxy command. Ludo’.