Re: [squid-users] ftp clients trouble: helpme please

> From: "Duane Wessels" <wessels@squid-cache.org>

> On Sat, 14 Feb 200=
4, andrea_ferraris@libero.it wrote:
>
> > I've a beautifull squid 2.5.=
4 server running with gentoo.
> > It works really well with http and htt=
ps client requests.
> > If a client requests an ftp://ftp.rfc-editor.org=
/some_RFC_#.txt
> > the browser displays it without trouble (the address=
is not
> > correct because at now I'm not there), but with all other=0D
=
> > ftp requests (it is ftp://ftp.gnu.org, ftp://ftp.microsoft.com,
> > =
ftp://ftp.cdrom.com) the browser client's can't display the
> > page and=
after a long time (about 30-60 seconds) it
> > give up. From the squid =
server with an ftp client I can connect
> > with those sites without tro=
uble. In the squid access logs
> > I can't see the ftp client request th=
at don't work, they aren't
> > logged.
> > I can't understand what's ha=
ppening, please helpme.
>
> You can probably get some additional info =
by enabling debugging
> for the FTP code:
>
> debug_options All,1=
9,9
>
> Then make some FTP requests to the servers that don't
> work=
and look at cache.log. Feel free to send us some cache.log
> excerpts =
if they don't make any sense.

Ok. It seems that's not a squid problem.=

For the working ftp://ftp.rfc-editor.org/some_RFC_#.txt
I got really a=
lot of messages in cache.log, for the not working
ftp sites I got exact=
ely nothing.

On the squid server I launched
# tethereal | grep -v -i=
ssh | grep '192\.168\.1\.111'

the active lan card is only one, I was =
connected in ssh to the
squid server, so I filtered all the ssh packets,=
and the IP of the
last grep is that one of the PC from where I was try=
ing to do ftp.
This PC is a WXP Pro Machine with IE6 (all last patches a=
pplied).

Then I launched ethereal on that PC and started capturing =0D
=
with the filter src 192.168.1.111 || dst 192.168.1.111,
it is I captured=
all the packets which source or destination
was the IP of that PC.
=0D
=
Then I made an ftp request from the PC. Here IE6 is
configured to connec=
t to the proxy server 192.168.1.240
(it is the squid server) on port 312=
8 for all protocol
(http, https, ftp, gopher).

The results are that =
on the squid side I saw nothing and on
the PC side I saw
- an ARP broa=
dcast request where the PC
asked for the MAC of the 192.168.1.250 (it's =
the Cisco router
that is the default gateway either from all the PCs, ei=
ther from
the squid server)
- the reply from the router
- 3 attempt fr=
om the PC to connect to the ftp IP address

I didn't see the request to=
the name server because
I already tried to connect to such site and may=
be the
PC was caching that reply.

Now I'm not more happy, because I =
don't know how
to solve that problem. Any idea?

Andrea