[Bug 3170] Sometimes sshd responds with different server signature

[bugzilla-daemon at mindrot.org]

https://bugzilla.mindrot.org/show_bug.cgi?id=3170

--- Comment #7 from Darren Tucker <dtucker at dtucker.net> ---
(In reply to Steven C from comment #4)
> I used the pre-compiled package provided by the Entware system in
> DD-WRT (https://github.com/Entware/Entware).
> 
> I will enter a bug in their system, but I fear they don't do much
> except compile pre-existing applications and make them available
> through the "opkg" command.

They apply a dozen patches to their openssl, including some to the
crypto engines:
https://github.com/Entware/Entware/tree/master/package/libs/openssl/patches,
some of which invoke /dev/crypto and based on the kernel logs from
https://openwrt.org/toh/netgear/r7800 it looks like your device has
crypto hardware, so all of libcrypto, the kernel and the hardware are
potential causes too.

I'd suggest trying the other host key types and see if the problem
occurs with all of them or only a subset.

I've also seen similar problems caused by bad ram and buggy compilers. 
There's an awful lot of variables, and if you can't change sshd you
won't be able to eliminate many of them.

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