Peer sending malformed protocol packets

I am running Tectia Server 6.4.12.353 on a Sun 10 box, and I've noticed that few days back my server started to thrown below message for some incoming connections:

Oct  2 18:32:55 SERVERNAME ssh-server-g3: [ID 702911 daemon.notice] 402 Disconnect, Reason: Protocol error, Src IP: 1.2.3.4, Dst IFace: default, Dst IP: 2.2.2.2, Src Port: 21511, Dst Port: 22, "Peer sending malformed protocol packets, Remote Disconnect", Session-Id: 19202

The content was obviously masked to hide some internal info. This server of mine handles thousands of connections (about 1.3k users), 4 servants, 256 per each; I've noticed that the error does not happen for all the connections, but I couldn't find any correlation between the ones that raises it.

What is the cause of this error and how can I get rid of it? Thanks.

asked Oct 04 '16 at 22:41

fmattos
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edited Nov 18 '16 at 15:04

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server ×69
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Asked: Oct 04 '16 at 22:41

Seen: 5,214 times

Last updated: Nov 18 '16 at 15:04

Peer sending malformed protocol packets

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