[ftpext] FTP64 LANGuage [was RE: [BEHAVE] one week WGLC, draft-ietf-behave-ftp64-05]

"Dan Wing" <dwing@cisco.com> Mon, 03 January 2011 20:36 UTC

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From: "Dan Wing" <dwing@cisco.com>
To: "'Iljitsch van Beijnum'" <iljitsch@muada.com>
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Date: Mon, 3 Jan 2011 12:38:50 -0800
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Cc: draft-ietf-behave-ftp64@tools.ietf.org, ftpext@ietf.org, 'Behave WG' <behave@ietf.org>, 'Dave Thaler' <dthaler@microsoft.com>
Subject: [ftpext] FTP64 LANGuage [was RE: [BEHAVE] one week WGLC, draft-ietf-behave-ftp64-05]
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> Maybe at this point in the discussion it would be good to hear from
> implementers. There are already tons of NAT44 FTP ALGs out there, I
> wonder how those solve this.

For whatever it's worth, I checked the FTP ALG for NAT44 in Cisco's
IOS, and it does nothing special with LANG (it doesn't block the
command nor parse the FEAT response).  We have other ALGs in other
products (e.g., Linksys, ASA), but I did not check those.  Our bug 
database (which spans all Cisco-branded products) has no customer 
complaints about FTP's LANG support.

-d