I recently installed the April 21st snapshot on my Soekris net4801 (dmesg
here[1]) that has a vpn1411 crypto-accelerator in it. For the first
time, I'm getting a tremendous amount of "Corrupted MAC on input" errors
while sshing into this machine.

While there has been discussion -- going all the way back to 3.5 --
that it's a hardware problem with the net4801 and the vpn1411, Soren has
said[2] that while there's a problem with the net45xx boards, he hasn't
heard of hardware problems with the net4801.

I'm not currently using IPsec (although it worked on both 3.5 and 3.6),
no other userland application is using /dev/crypto, and this happens even
though I'm only running a single ssh connection.

I've never had this problem occur with OpenBSD 3.6 or 3.5 on this box;
in fact, I rolled back sshd and it's supporting libraries to the 3.5
version (OpenSSH_3.8 (sshd.c, v 1.290 2004/03/11)), and the problem goes
away. Has something regressed? Is anyone else seeing this for the first


[1] http://www.pobox.com/~thevision/open...kris_dmesg.txt
[2] http://lists.soekris.com/pipermail/s...er/021803.html

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