If the Master Server is unable to connect to a another machine and displays a TTL expiry error after you use the Host Details page to update the configuration of that machine or any machine upstream, you may need to manually generate the transport.config file for some or all of the intermediate Local Distributors between that machine and the Master Server. Test the connection to each of the upstream Local Distributors of the problem machine by moving from the problem machine to the Master Server. For the Local Distributor to which you can successfully connect that is closest to the problem machine, regenerate the transport.config file and all of its downstream Local Distributors. Use the CLI Client net.gencfg command to generate transport.config files.