Hi, I am currently implementing SSH ver1 client for my school work and testing it with OpenSSH servers. Unfortunately I cannot execute commands after succesful login without allocate pty. My client send SSH_CMSG_EXEC_SHELL packet on server, but dont receive any answer. According RFC defined SSH1, server should send SSH_SMSG_SUCCESS or SSH_SMSG_FAILURE message. So I tried send SSH_CMSG_EXEC_CMD with command, but after executing command server send EXIT_STATUS message. I dont understand why, because RFC document define EXEC_CMD message this way: "Starts executing the given command, and enters interactive session mode." Would you please explain me why OpenSSH server doesnt response to SSH_CMSG_EXEC_SHELL message or closing connection after EXEC_CMD message? Thank you. S.Svec (CZ)