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From: Mick <michaelkintzios@gmail.com>
To: gentoo-user@lists.gentoo.org
Subject: Re: [gentoo-user] setsockopt SO_DEBUG - ftp connection problems
Date: Tue, 5 Jul 2011 21:31:32 +0100
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References: <201107051258.40620.michaelkintzios@gmail.com> <201107052034.36054.michaelkintzios@gmail.com> <CAEH5T2MmaPx0q1=XV+ejChm5DwmuaoC18eQxRuBGu4MpBpTu_w@mail.gmail.com>
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On Tuesday 05 Jul 2011 20:50:55 Paul Hartman wrote:
> On Tue, Jul 5, 2011 at 2:34 PM, Mick <michaelkintzios@gmail.com> wrote:
> > On Tuesday 05 Jul 2011 19:42:53 Paul Hartman wrote:
> >> On Tue, Jul 5, 2011 at 6:58 AM, Mick <michaelkintzios@gmail.com> wrote:
> >> > 200 Switching to ASCII mode.
> >> > tnftp: setsockopt SO_DEBUG (ignored): Permission denied
> >> > ---> EPSV
> >> > 229 Entering Extended Passive Mode (|||62430|)
> >> > 229 Entering Extended Passive Mode (|||62430|)
> >>=20
> >> Don't use EPSV, use PASV instead, hopefully that will work.
> >=20
> > I tried defining passive when in the session. It was in passive by
> > default, so I had to toggle it back on again:
> >=20
> > got remotecwd as `/'
> > ---> TYPE I
> > 200 Switching to Binary mode.
> > ftp> passive
> > Passive mode: off; fallback to active mode: off.
> > ftp> passive
> > Passive mode: on; fallback to active mode: on.
> > ftp> ls
> > ---> TYPE A
> > 200 Switching to ASCII mode.
> > tnftp: setsockopt SO_DEBUG (ignored): Permission denied
> > ---> EPSV
> > 229 Entering Extended Passive Mode (|||9832|)
> > 229 Entering Extended Passive Mode (|||9832|)
> >=20
> > How can I control it to not go into extended passive?
> >=20
> > PS. The server reports EPSV in its features, so I am not sure why it
> > would not work with EPSV.
>=20
> FTP is the bastard protocol from hell. There are more ways it can go
> wrong than right. :)=20
Yes, I can attest to this! :@
> Firewalls especially love to silently rewrite FTP
> commands and port mappings. It can be a real PITA to debug. So, even
> if your client supports EPSV and your server supports EPSV, if
> firewall/router in-between does not then it could still break things.
I've turned off my machine's firewall thinking that all this passive/active=
=20
malarkey was causing the problem, but couldn't do anything about the router=
's=20
firewall.
> Even if you wireshark the session on your computer, what you see may
> not match what's being sent to the remote server, and vice-versa.
>=20
> Standard PASV mode is much more widely supported than EPSV mode, so
> that's the line of thought that brought me to suggest trying that.
>=20
> I've never used tnftp but from the manpage I googled, it looks like
> "epsv4 off " is the command to toggle EPSV off.
YES! :-)
That's what was causing the problem, it was EPSV. I assume that Konqueror=
=20
switches it off and tnftp has it on by default.
Thank you very much.
=2D-=20
Regards,
Mick
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