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re "corrupted MAC on input"
- To: misc_(_at_)_openbsd_(_dot_)_org
- Subject: re "corrupted MAC on input"
- From: Chris <sea_dragons_(_at_)_mac_(_dot_)_com>
- Date: Tue, 30 Jul 2002 16:41:04 -0500
For the archives:
I wrote ages ago whether anyone had insight on ssh disconnections
with the error message "corrupted MAC on input" and just recently was
contacted by a fellow with totally different hardware and software on
both OpenSSH client and server. The sole common link in the affected
setups: connections that ran through a Linksys 4-port router/switch.
Advertised as good for small offices, it is perhaps avoided by
people who require persistent ssh connections (e.g., connects to a
machine using ports enabled only by authpf and thus only while OpenSSH
connections persist) at any point in the intervening network.
Hi -- I noticed your Neohapsis post about your ssh connections dropping
with a "corrupted mac on input" error. I'm also getting a lot of dropped
connections with the same error. Did you ever learn of a fix, or what's
causing the problem?
# I did not find any particular fix. It remains a puzzlement. I am
# unsure whether networking hardware between the machines, foibles within
# one or more of the machines themselves, or cosmic rays are the culprit.
# What hardware have you seen this between?
Thanks for the reply. The hardware involved are all Pentium-class
Linux boxes. It's happening over my wireless network, which is based
on a Linksys access point.
# Ahh ... all my affected machines were attached in one way or another to
# a 4-port Linksys router ....
# Verrrrry interesting. I will experiment with boxes connected
# without the intervening Linksys device. But it will require me to get
# time to re-arrange my network.
Aha! Yes, I'm using one of those 4-port switch, DSL router, wireless
access point combo-units. My server (the machine I connect *to* a lot)
in plugged into one of the switch ports. I'm usually connecting *from*
my laptop over wireless.