Path: utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!daily-planet.concordia.ca!alcor!smw From: smw@alcor.concordia.ca ( Steven Winikoff ) Newsgroups: comp.unix.ultrix Subject: Help! Telnet is broken under Ultrix 4.1 Message-ID: Date: 27 Jun 91 15:40:40 GMT Sender: usenet@daily-planet.concordia.ca Lines: 47 All of a sudden users can no longer use telnet to connect to Alcor, our DECsystem 5500 running Ultrix 4.1. Telnet out *from* Alcor to other systems works. Telnet from any system *to* Alcor fails in the following way, even when I try it from Alcor to itself: Trying... Connected to alcor. Escape character is '^]'. Connection closed by foreign host. Telnet to other ports on Alcor works (eg # telnet Alcor 25). When telnet fails, telnetd leaves a core dump in /etc. (I don't know enough about dbx or core dump formats to be able to learn anything from this.) Telnet used to work properly. I don't know exactly how long it's been broken, but I learned of the problem on June 19th. On June 17th I had installed the DECnet/Internet gateway (using # setld -c DNPINETGW400 INSTALL). On June 18th I'd modified our /etc/hosts file. However, editing /etc/inetd.conf to use telnetd instead of telnetd.gw does NOT solve the problem. Neither does restoring the previous /etc/hosts. I've reached the limit of my knowledge of telnet and IP configuration. I have a service call in to the DEC software hotline, but so far they too have been unable to help. Does anyone know what's going on? Help!!! Thanks in advance, - Steven ------------------------------------------------------------------------ Steven Winikoff smw@alcor.concordia.ca Software Analyst Dept. of Computing Services Concordia University voice: (514) 848-7619 Montreal, Quebec, Canada (10:00-18:00 EST)