On Wed, May 22, 2013 at 02:59:10PM +0200, Jiri Slaby wrote: > From: Jeff Mahoney <[email protected]> > > The FTP conntrack code currently only accepts the following format for > the 227 response for PASV: > 227 Entering Passive Mode (148,100,81,40,31,161). > > It doesn't accept the following format from an obscure server: > 227 Data transfer will passively listen to 67,218,99,134,50,144 > > From RFC 1123: > The format of the 227 reply to a PASV command is not > well standardized. In particular, an FTP client cannot > assume that the parentheses shown on page 40 of RFC-959 > will be present (and in fact, Figure 3 on page 43 omits > them). Therefore, a User-FTP program that interprets > the PASV reply must scan the reply for the first digit > of the host and port numbers.
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