Lately, I get lots of these errors on my home server. Their occurrence seems proportional to the traffic, so if I am working in a shell on the server I may seem 1-2 a day. But If I start some rsync, or scp process I see 5-6 per file transferred.
kex protocol error: type 7 seq 358115 kex protocol error: type 7 seq 429489 kex protocol error: type 7 seq 500711 kex protocol error: type 7 seq 571534 kex protocol error: type 7 seq 642352
The server is a Gentoo Linux running OpenSSH_7.2p2, OpenSSL 1.0.2h This problem seems to happen independent on the client that is connected to the server. That might be my notebook (also Gentoo with OpenSSH_7.2p2, OpenSSL 1.0.2h) or a Qnap NAS (Linux QNAP1 3.4.6 #1 SMP Wed Jun 1 05:17:33 CST 2016 x86_64 unknown - OpenSSH_7.2p2, OpenSSL 1.0.1t)
I have not been able to find out what a "type 7" error means. Despite these warnings the transfer seems to work well, I have checked the transferred files and there is no coruption. So basically these warning messages just garble the screen output, which is my main motivation to get rid of them.