Why do TELNET and FTP take 1 to 2 minutes to connect?
If it takes 1 to 2 minutes to finally make a connection when using TELNET or FTP, there is probably a failing reverse DNS lookup. In other words, the server is doing a reverse lookup on the client’s IP address and cannot resolve it. You need to add the address of the client to the reverse DNS files for resolution. If you use DNS but do not have Internet connectivity, add a FORWARDERS line to the end of your DOMAIN-NAME-SERVICE.CONFIGURATION file, then SLAVE on the next line. This causes DNS to look through your DNS files and cache, but not attempt to contact the root servers on the Internet. If you are using host-tables, add the address of the client to the HOSTS.LOCAL file. Also, if you are using host tables and not using DNS, be sure DNS is disabled from SERVER-CONFIG. For FTP: define/system MULTINET_FTP_FAST_TIMEOUT will minimize the amount of time spent on a reverse lookup.
