Discarded IAC Sequence errors

Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic

   Event logs filling up on D3/NT 7.3.6 Windows 2000 Server.

Here are snippets of nt_eventlog, nt_pinfo, where az for one port (142).

nt_eventlog:

4) 06/14/04 05:45:32PM *** Type=WRNG Source=D3_Unclassified Computer=CTS-D3

Class D3_Unclassified, Exception NE-1, Error -1, Thread 0xce0

Discarded IAC sequence

9) 06/14/04 05:43:32PM *** Type=WRNG Source=D3_Unclassified Computer=CTS-D3

Class D3_Unclassified, Exception NE-1, Error -1, Thread 0xce0

Discarded IAC sequence

14) 06/14/04 05:41:32PM *** Type=WRNG Source=D3_Unclassified Computer=CTS-D3

Class D3_Unclassified, Exception NE-1, Error -1, Thread 0xce0

Discarded IAC sequence

nt_pinfo:

142 00000ce0 T 1.703 0.281 763 805 192.168.50.92:1520

where 142 (az

+0142 033585 F390 000018 2 RDL_GETCHAR:000 RDL_GETCHAR:000 READLINX:000

BR_INPUT:000

These are all generated from workstations running Accuterm telnet sessions to D3/NT 7.3.6.

Getting one every 2 minutes for each workstation using Accuterm with telnet sessions to D3/NT.

The above is only one of several workstations that do the same thing.

Any ideas other that overwriting log or clearing?

Would like to know why this is happening!

Author	Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic
kilomike Members Profile Find Members Posts Beta Tester Joined: March 18 2004 Location: United States Status: Offline Points: 9	Post Options Post Reply Quote kilomike Report Post Thanks(0) Quote Reply Topic: Discarded IAC Sequence errors Posted: June 15 2004 at 9:26am
	Event logs filling up on D3/NT 7.3.6 Windows 2000 Server. Here are snippets of nt_eventlog, nt_pinfo, where az for one port (142). nt_eventlog: 4) 06/14/04 05:45:32PM * Type=WRNG Source=D3_Unclassified Computer=CTS-D3 Class D3_Unclassified, Exception NE-1, Error -1, Thread 0xce0 Discarded IAC sequence 9) 06/14/04 05:43:32PM * Type=WRNG Source=D3_Unclassified Computer=CTS-D3 Class D3_Unclassified, Exception NE-1, Error -1, Thread 0xce0 Discarded IAC sequence 14) 06/14/04 05:41:32PM *** Type=WRNG Source=D3_Unclassified Computer=CTS-D3 Class D3_Unclassified, Exception NE-1, Error -1, Thread 0xce0 Discarded IAC sequence nt_pinfo: 142 00000ce0 T 1.703 0.281 763 805 192.168.50.92:1520 where 142 (az +0142 033585 F390 000018 2 RDL_GETCHAR:000 RDL_GETCHAR:000 READLINX:000 BR_INPUT:000 These are all generated from workstations running Accuterm telnet sessions to D3/NT 7.3.6. Getting one every 2 minutes for each workstation using Accuterm with telnet sessions to D3/NT. The above is only one of several workstations that do the same thing. Any ideas other that overwriting log or clearing? Would like to know why this is happening!

PSchellenbach Members Profile Find Members Posts Admin Group Moderator Joined: December 15 2003 Location: United States Status: Offline Points: 2150	Post Options Post Reply Quote PSchellenbach Report Post Thanks(0) Quote Reply Posted: June 16 2004 at 9:56am
	Hi kilomike - The errors are due to the brain-dead telnet server on D3/NT. Actually, they are the result of the "send keepalives" option in the advanced telnet settings (tools->settings->connection->advanced). There is technically no "keepalive" feature in the telnet protocol, but there are some messages that, given a certain state, are defined by the protocol to be ignored. AccuTerm uses one of these "ignore" messages for its keepalive. The keepalive interval happens to be 2 minutes, which is exactly what you are seeing in the error log. The D3 telnet server is brain-dead on two accounts here. First, if it follows the spec, it should simply ignore the message. Second, if it does not recognize a command, it should simply ignore it. The spec does not hint that an unrecognized command is an error. Bottom line: turn off keepalives when using D3/NT telnet. Thanks, Pete

kilomike Members Profile Find Members Posts Beta Tester Joined: March 18 2004 Location: United States Status: Offline Points: 9	Post Options Post Reply Quote kilomike Report Post Thanks(0) Quote Reply Posted: July 14 2004 at 11:14am
	Is it always best to use a host type of "D3/NT" instead of "default" in Accuterm settings for telnet connection to a D3/NT server? And and have Send keepalives uncheck?

PSchellenbach Members Profile Find Members Posts Admin Group Moderator Joined: December 15 2003 Location: United States Status: Offline Points: 2150	Post Options Post Reply Quote PSchellenbach Report Post Thanks(0) Quote Reply Posted: July 14 2004 at 11:57am
	Hi - The D3/NT host type sets telnet options that are most compatible with the D3/NT telnet server, so you should always select this host type for D3/NT hosts. And, as explained above, never select the keepalives option. At least until Raining Data corrects thier telnet server to ignore the unrecognized IAC sequence, as the telnet specification mandates. Thanks, Pete

TonyG Members Profile Find Members Posts Beta Tester Joined: February 04 2004 Location: United States Status: Offline Points: 127	Post Options Post Reply Quote TonyG Report Post Thanks(0) Quote Reply Posted: September 08 2004 at 11:52am
	Hi guys. I just saw this thread and decided to be proactive about reporting it to RD. Action Item 30267 has been filed for this issue. There's no telling if it will result in a change but at least the process has been started.
	Tony Gravagno Nebula Research & Development TG@ Nebula-RnD . com http://Nebula-RnD.com/blog http://Twitter.com/TonyGravagno http://groups.google.com/group/mvdbms https://www.linkedin.com/groups/64935