Hi Yegor, The OpenSSH sources already disable SSH compression by default. Look in myproposal.h for how KEX_DEFAULT_COMP is defined. #define KEX_DEFAULT_COMP "none,zlib@xxxxxxxxxxx" Looking at a verbose connection: The client sends to the server "none,zlib@xxxxxxxxxxx,zlib" The server sends to the client "none,zlib@xxxxxxxxxxx,zlib" The sshconnect2.c ammends the conversation to update the default based on the 'compression' option ('ssh -C' or 'ssh -oCompression=yes' or in the config file). -- Mark _______________________________________________ openssh-unix-dev mailing list openssh-unix-dev@xxxxxxxxxxx https://lists.mindrot.org/mailman/listinfo/openssh-unix-dev