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In my log-file I have get a lot of unsuccessfull connection from an amazon AWS Server. When I say a lot, than I actually mean a lot: About all 10-15 seconds an unsucessfull connect request as you can see.
Nov 21 15:53:40 myserver postfix/smtpd[1657]: SSL_accept error from ec2-18-216-14-119.us-east-2.compute.amazonaws.com[18.216.14.119]: lost connection
Nov 21 15:53:40 myserver postfix/smtpd[1657]: lost connection after CONNECT from ec2-18-216-14-119.us-east-2.compute.amazonaws.com[18.216.14.119]
Nov 21 15:53:40 myserver postfix/smtpd[1657]: disconnect from ec2-18-216-14-119.us-east-2.compute.amazonaws.com[18.216.14.119]
Nov 21 15:53:51 myserver postfix/smtpd[1657]: connect from ec2-18-216-14-119.us-east-2.compute.amazonaws.com[18.216.14.119]
Nov 21 15:54:02 myserver postfix/smtpd[1657]: SSL_accept error from ec2-18-216-14-119.us-east-2.compute.amazonaws.com[18.216.14.119]: lost connection
Nov 21 15:54:02 myserver postfix/smtpd[1657]: lost connection after CONNECT from ec2-18-216-14-119.us-east-2.compute.amazonaws.com[18.216.14.119]
Nov 21 15:54:02 myserver postfix/smtpd[1657]: disconnect from ec2-18-216-14-119.us-east-2.compute.amazonaws.com[18.216.14.119]
Nov 21 15:54:19 myserver postfix/smtpd[1657]: connect from ec2-18-216-14-119.us-east-2.compute.amazonaws.com[18.216.14.119]
Nov 21 15:54:29 myserver postfix/smtpd[1657]: SSL_accept error from ec2-18-216-14-119.us-east-2.compute.amazonaws.com[18.216.14.119]: lost connection
Nov 21 15:54:29 myserver postfix/smtpd[1657]: lost connection after CONNECT from ec2-18-216-14-119.us-east-2.compute.amazonaws.com[18.216.14.119]
Nov 21 15:54:29 myserver postfix/smtpd[1657]: disconnect from ec2-18-216-14-119.us-east-2.compute.amazonaws.com[18.216.14.119]
Now I have checked some other reports on this, and I would not bother if this would just be occassional. But every 10-15 sec from the identical server is quite a lot.
So my question is:Now I have checked some other reports on this, and I would not bother if this would just be occassional. But every 10-15 sec from the identical server, is what really bothers me.
Has someone made a similar experience, an idea how to prevent it, or a explanation.
Kurt Ludikovsky
Posted 2017-11-21T17:43:26.027
Reputation: 141
1Sounds like a monitoring application. What do you have monitoring your server’s uptime and reachability? – Appleoddity – 2017-11-21T18:52:26.453
This is just a small VPS, so any monitoring would be on a 1-5 minute intervall. And as far as I have read this is the trial to establish a TLS-connection with fall back to my server. NOthing that I know that should exist. – Kurt Ludikovsky – 2017-11-22T13:38:00.447