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Remote Telnet failing on 2860n ONLY on 3.8.1

  • matttoner
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04 Nov 2015 17:05 #1 by matttoner
Hi All,

I run a few different Telnet scripts (get up time, xDSL Sync speeds, firmware versions) etc for our database and we have a strange error now that is ONLY effecting 3.8.1 devices.

If i run any of the scripts remotely on anything lower than 3.8.1 the script works perfectly, but if i run it on 3.8.1 it just hangs and dies.

but if i manually type it in a telnet session, sometimes it just comes back blank and sometimes it gives me the output.

any ideas?

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  • matttoner
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10 Feb 2016 10:45 #2 by matttoner
Replied by matttoner on topic Re: Remote Telnet failing on 2860n ONLY on 3.8.1
This also hangs and dies on 3.8.2...

Anyone able to help?

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10 Feb 2016 18:07 #3 by admin
A long shot, but this MIGHT be deliberate as an anti-hacking method to stop hacking/automated scripting. A script should emulate a keyboard though so I don't know they would detect it...unless it's a timing issue - can you slow
down the speed at which you send character ?



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  • matttoner
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08 Mar 2016 12:01 #4 by matttoner
Replied by matttoner on topic Re: Remote Telnet failing on 2860n ONLY on 3.8.1
I would also agree, but if you manually send the commands over telnet, sometimes it doesnt even reply, other times it does.

seems telnet is just broken in the new version.

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  • admin2
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08 Mar 2016 16:14 #5 by admin2
What commands are you typing ?

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09 Mar 2016 22:09 #6 by lorian
Don't forget the more times you telnet to your router the more times some has to sniff the plain text password.

Generally draytek CLIs are pretty bulletproof for connecting over Telnet, if I saw this issue the first thing I'd check for would be a duplex mismatch on the LAN port of the connected device.

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