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HTTPS SNI Monitoring How-to

Hi, You may or may not already have encountered a webserver that requires the SNI (Server Name Indication) extension in order to know which website it needs to serve you. It comes down to "if you ...
Published Mar 23, 2014
Version 1.0
availability
deployment
https
management
monitor
monitoring
openssl
security
sni
ssl
Thomas_Schocka1's avatar
Thomas_Schocka1
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Joined May 04, 2012
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Thomas_Schocka1
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daboochmeister's avatar
daboochmeister
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Jul 15, 2016

I'm confused on why this script would be needed. If you know the hostname which you want to be included in the HTTPS probe (which seems to be a req't for this script), why don't you simply create an HTTPS monitor, then adjust the Send string to be HTTP/1.1 and include the correct hostname, e.g.:

 

GET / HTTP/1.1\r\nHost: sni-name.whateverdomain.com\r\nConnection: Close\r\n\r\n

 

That always works for me in such situations. What advantage does this script have over doing that?

 

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