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.
scp -vvv original_argumetns
)? It should say what message caused this error. The message means that the server received message, that is not supported.