SCO Unix comp.unix.sco Technical FAQ 4/9

Questions and Answers about TCP/IP and NFS

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FAQ Starting Page /SCOFAQ/index.html

• How do I find out what IP address a user logged in from?
  
  
• telnet doesn't work properly
  
  
• How do I know if I have enough streams buffers for TCP/IP and/or NFS?
  
  
• TCP/IP gives messages like "Notice: TCP SUM: SRC 89270107 SUM 0000D7AD"
  
  
• How do I get /etc/issue to print for telnet sessions?
  
  
• What does "WARNING: tcp_deqdata" mean?
  
  
• How to setup resolv.conf for DNS configuration
  
  
• Ping is really slow
  
  
• Telnet/FTP is very slow to connect
  
  
• Dial in PPP disconnects immediately
  
  
• How do I add a default route?
  
  
• How do I test a popd mail connection?
  
  
• How do I test an imap server?
  
  
• How do I test a smtp mail connection?
  
  
• Why can't my other sub-net browse the Visionfs or Samba shares?
  
  
• How do I get the latest version of Visionfs for Unixware 7 and OSR5 5.0.4 or greater?
  
  
• Why do I get "portmapper is not responding" errors?
  
  
• What do "can't get passwd for local host" messages in syslog mean?
  
  
• I've telnetted to a Linux machine from a SCO console, and the automatic colors for commands like ls and vi have made it impossible to see what I type.
  
  
• Why do I have collisions in "netstat -i" ?
  
  
• How do I configure Windows Dial Up Networking (DUNS) to automatically connect to a SCO PPP session?
  
  
• Why doesn't ping stop?
  
  
• What can I check if ping doesn't work at all?
  
  
• How can I force the speed and duplex settings of my NIC (or check what it is now)?
  
  
• How can I tell what process has a network port in use?
  
  
• Why does this "224" route show up in netstat -r? What's this 127 address?
  
  
• How can I assign a user process to a specific pseudo tty?
  
  
• I see in netstat that processes get stuck in TIME_WAIT for a long time. How can I change this behaviour?
  
  
• I don't understand all this half/full duplex negotiation stuff
  
  
• How do I secure services on a SCO system?
  
  
• Why is my ftp transfer between two 100Mb machines so slow?
  
  
• What is "port knocking"?
  
  
• How can I restrict who can login with ssh?
  
  
• Why do I have a license for Morning Star PPP and how do I use it (OSR507)?
  
  
• open of pid file failed: No such file or directory in syslog ftpd
  
  

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