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From Leo Sutic <leo.su...@inspireinfrastructure.com>
Subject Re: [Net] slow ftp pasv connection
Date Wed, 07 Dec 2005 18:11:28 GMT
Do this:

Go to the FTP server.

IF THE FTP SERVER IS RUNNING LINUX:

Issue the command:

time nslookup <ip address of linux client>
time nslookup <ip address of windows client>


ELSE:

nslookup <ip address of linux client>
nslookup <ip address of windows client>

I think the lookup of the windows client will be much much slower.

/LS

On 12/7/05, luan xl <helix_ogg@hotmail.com> wrote:
> no, I use the ip address directly, both server and clients are in a 100mbit
> LAN.
>
>
> >From: Leo Sutic <leo.sutic@inspireinfrastructure.com>
> >Reply-To: "Jakarta Commons Users List" <commons-user@jakarta.apache.org>
> >To: Jakarta Commons Users List <commons-user@jakarta.apache.org>
> >Subject: Re: [Net] slow ftp pasv connection
> >Date: Wed, 7 Dec 2005 09:12:38 +0100
> >
> >Could be related to nameserver lookups. When you connect to the FTP
> >server, does it have both forward (name -> ip) and reverse (ip ->
> >name) dns entries?
> >
> >/LS
> >
> >On 12/7/05, luan xl <helix_ogg@hotmail.com> wrote:
> > > Hi, I hava just written some code to traverse the ftp site using the
> > > commons-net 1.4.
> > > I tested it on Windows(XP SP2) and Linux(Debian 3.0), they both work
> > > correctly. But one
> > > thing just make me confused.
> > >
> > > On my Windows platform, when I issue the command LIST in passive mode,
> the
> > > data
> > > connection is very slow to make, usually takes 5 to 10 seconds.However
> if I
> > > issue
> > > the command LIST in port mode, the connection is made very quickly. On
> the
> > > Linux
> > > platform, both passive and port are very quickly.
> > >
> > > On both platform firewalls are closed, the ftp server is same for
> tests.
> > > what is the
> > > possible cause for this?
> > >
> > >
> > >
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> >
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>
>
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