lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:	Mon, 15 Jan 2007 20:39:36 +1100
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	mjt@....msk.ru (Michael Tokarev)
Cc:	netdev@...r.kernel.org
Subject: Re: rare bad TCP checksum with 2.6.19?

Michael Tokarev <mjt@....msk.ru> wrote:
>
> Note there's no funny/interesting hardware involved, like network cards with
> tcp checksumming offload capabilities (this is plain dumb 8139 card).

The 8139 card might be dumb, but the driver isn't :) It emulates
checksum offload in software, meaning that tcpdump will show bogus
checksums.

So please disable hardware checksum offload with ethtool -K and
then try again.

Thanks,
-- 
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
-
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Powered by blists - more mailing lists