Mailing List Archive

> Greg Liapis wrote:
>
> Hi all.
> I am newbie to apache and linux and my question is probably silly.
> I have installed apache1.3.22 in my system which runs redhat linux 7.1
> and I haven't made any changes in the
> configuration files. When I type localhost in my browser's address
> field everything goes fine and I can see the html pages I have created
> in /usr/local/apache_1.3.22/htdocs. When I connect to the internet via
> modem and get a dynamic IP address, I can also see the site I have
> created by typing
> this IP address in the browser's address field.
> The problem is that when I try to access my site from a remote
> computer with this IP address, nothing happens. Could you please help
> me?

When you say "nothing happens", I assume you mean that the browser sits
for a while then times-out. If so, this is typical behaviour of a
firewall dropping packets.

Probably, your ISP is blocking incoming requests on port 80 to your
address. That is, they allow you a client connection to the internet but
do not allow you to operate as a server. To check this, look in the
apache access_log while you try to hit it from a remote machine (use
"tail -f access_log") - probably you will see no requests. You can also
listen to your network card with "snoop". Login as root on your server
and do:

# snoop port 80

You will probably see nothing coming in from external addresses. Check
the man pages for snoop for more info.

If the problem is your ISP then the only solution is to ask them to
allow you incoming packets on port 80 - they may want poli lefta for
this!

Rgds,

Owen Boyle.

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Thanks a lot for your response Owen. But the same thing happened when I
installed Apache in a computer which was connected to the network of my
University(with a static IP) and tried to access it from my home. Do I have
to change anything in the configuration files (ServerName or something like
that?).
I am really surprised that you know the greek word for money. Have you
visited my country?

Thanks Again

Greg Liapis


----- Original Message -----
From: "Owen Boyle" <obo@bourse.ch>
To: <users@httpd.apache.org>
Sent: Thursday, February 07, 2002 2:15 PM
Subject: Re: Please help a newbie


> > Greg Liapis wrote:
> >
> > Hi all.
> > I am newbie to apache and linux and my question is probably silly.
> > I have installed apache1.3.22 in my system which runs redhat linux 7.1
> > and I haven't made any changes in the
> > configuration files. When I type localhost in my browser's address
> > field everything goes fine and I can see the html pages I have created
> > in /usr/local/apache_1.3.22/htdocs. When I connect to the internet via
> > modem and get a dynamic IP address, I can also see the site I have
> > created by typing
> > this IP address in the browser's address field.
> > The problem is that when I try to access my site from a remote
> > computer with this IP address, nothing happens. Could you please help
> > me?
>
> When you say "nothing happens", I assume you mean that the browser sits
> for a while then times-out. If so, this is typical behaviour of a
> firewall dropping packets.
>
> Probably, your ISP is blocking incoming requests on port 80 to your
> address. That is, they allow you a client connection to the internet but
> do not allow you to operate as a server. To check this, look in the
> apache access_log while you try to hit it from a remote machine (use
> "tail -f access_log") - probably you will see no requests. You can also
> listen to your network card with "snoop". Login as root on your server
> and do:
>
> # snoop port 80
>
> You will probably see nothing coming in from external addresses. Check
> the man pages for snoop for more info.
>
> If the problem is your ISP then the only solution is to ask them to
> allow you incoming packets on port 80 - they may want poli lefta for
> this!
>
> Rgds,
>
> Owen Boyle.
>
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Greg Liapis wrote:
>
> Thanks a lot for your response Owen. But the same thing happened when I
> installed Apache in a computer which was connected to the network of my
> University(with a static IP) and tried to access it from my home. Do I have
> to change anything in the configuration files (ServerName or something like
> that?).

If we assume you have an unrestricted connection (did you check in the
TransferLog and snoop the network interface?) then, indeed, ServerName
could be the problem. Apache uses ServerName to make self-referential
URLs - that is, when you type in the browser:

http://ip-addr/banana, if apache can't find a file called "banana" in
your documentroot, it replies with a redirect to
http://<ServerName>/banana/ - i.e., it adds a trailing slash. The best
situation is to have a proper DNS domain-name and use this for
ServerName and requests. But if you don't have one, set ServerName to
the IP-address. Also, try the browser requests with and without trailing
slashes and try accessing files you know exist, e.g.

http://ip-addr/foo/bar.html <-- that should always work.

But I do advise you to look in the access_log and error_log when you are
hitting the server and see what it is doing.

rgds,

Owen Boyle.

> I am really surprised that you know the greek word for money. Have you
> visited my country?
Vevia, poli fores! Ego eimai Skotzezos kai m'arezi poli Elladha.

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Thanks again Owen.

I looked in the access_log and nothing happens when I try to hit my server
from a remote computer.
I am talking about the apache web server I installed in a machine in the
University, which is connected to the University network and therefore to
the internet. After having installed apache, do I have to declare my IP
somewhere in the apache configuration files or it finds it automatically? Do
I have to configure anything else? All manuals I've read say that after
installation my computer is already a web server but that doesn't seem to be
my case.

I hope I'll meet you here in Greece some day. I think that your country is
beutiful too.

Thanks for your help.


----- Original Message -----
From: "Owen Boyle" <obo@bourse.ch>
To: <users@httpd.apache.org>
Sent: Thursday, February 07, 2002 2:42 PM
Subject: Re: Please help a newbie


> Greg Liapis wrote:
> >
> > Thanks a lot for your response Owen. But the same thing happened when I
> > installed Apache in a computer which was connected to the network of my
> > University(with a static IP) and tried to access it from my home. Do I
have
> > to change anything in the configuration files (ServerName or something
like
> > that?).
>
> If we assume you have an unrestricted connection (did you check in the
> TransferLog and snoop the network interface?) then, indeed, ServerName
> could be the problem. Apache uses ServerName to make self-referential
> URLs - that is, when you type in the browser:
>
> http://ip-addr/banana, if apache can't find a file called "banana" in
> your documentroot, it replies with a redirect to
> http://<ServerName>/banana/ - i.e., it adds a trailing slash. The best
> situation is to have a proper DNS domain-name and use this for
> ServerName and requests. But if you don't have one, set ServerName to
> the IP-address. Also, try the browser requests with and without trailing
> slashes and try accessing files you know exist, e.g.
>
> http://ip-addr/foo/bar.html <-- that should always work.
>
> But I do advise you to look in the access_log and error_log when you are
> hitting the server and see what it is doing.
>
> rgds,
>
> Owen Boyle.
>
> > I am really surprised that you know the greek word for money. Have you
> > visited my country?
> Vevia, poli fores! Ego eimai Skotzezos kai m'arezi poli Elladha.
>
> ---------------------------------------------------------------------
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Greg

Redhat, if I remember right redhat likes to by default block outside
address from reaching a machine. Last time I ran redhat 7.1 I had to turn
off either ipchains or iptables to get an outside connection to work. You
might what to make sure that they aren't running before you jump into the
apache config.
The command to stop them if they are running.
/etc/init.d/ipchains stop
/etc/init.d/iptables stop

Scott




Greg Liapis wrote:



Hi all.
I am newbie to apache and linux and my question is probably silly.
I have installed apache1.3.22 in my system which runs redhat linux 7.1 and
I haven't made any changes in the
configuration files. When I type localhost in my browser's address field
everything goes fine and I can see the html pages I have created in
/usr/local/apache_1.3.22/htdocs. When I connect to the internet via modem
and get a dynamic IP address, I can also see the site I have created by
typing
this IP address in the browser's address field.
The problem is that when I try to access my site from a remote computer
with this IP address, nothing happens. Could you please help me?

Thank you very much

Greg Liapis
Greece




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The default page you are seeing is located in /var/www/html/


----- Original Message -----
From: "Greg Liapis" <liapisg@freemail.gr>
To: <users@httpd.apache.org>
Sent: Thursday, February 07, 2002 10:55 AM
Subject: Re: Please help a newbie


> Thanks again Owen.
>
> I looked in the access_log and nothing happens when I try to hit my server
> from a remote computer.
> I am talking about the apache web server I installed in a machine in the
> University, which is connected to the University network and therefore to
> the internet. After having installed apache, do I have to declare my IP
> somewhere in the apache configuration files or it finds it automatically?
Do
> I have to configure anything else? All manuals I've read say that after
> installation my computer is already a web server but that doesn't seem to
be
> my case.
>
> I hope I'll meet you here in Greece some day. I think that your country is
> beutiful too.
>
> Thanks for your help.
>
>
> ----- Original Message -----
> From: "Owen Boyle" <obo@bourse.ch>
> To: <users@httpd.apache.org>
> Sent: Thursday, February 07, 2002 2:42 PM
> Subject: Re: Please help a newbie
>
>
> > Greg Liapis wrote:
> > >
> > > Thanks a lot for your response Owen. But the same thing happened when
I
> > > installed Apache in a computer which was connected to the network of
my
> > > University(with a static IP) and tried to access it from my home. Do I
> have
> > > to change anything in the configuration files (ServerName or something
> like
> > > that?).
> >
> > If we assume you have an unrestricted connection (did you check in the
> > TransferLog and snoop the network interface?) then, indeed, ServerName
> > could be the problem. Apache uses ServerName to make self-referential
> > URLs - that is, when you type in the browser:
> >
> > http://ip-addr/banana, if apache can't find a file called "banana" in
> > your documentroot, it replies with a redirect to
> > http://<ServerName>/banana/ - i.e., it adds a trailing slash. The best
> > situation is to have a proper DNS domain-name and use this for
> > ServerName and requests. But if you don't have one, set ServerName to
> > the IP-address. Also, try the browser requests with and without trailing
> > slashes and try accessing files you know exist, e.g.
> >
> > http://ip-addr/foo/bar.html <-- that should always work.
> >
> > But I do advise you to look in the access_log and error_log when you are
> > hitting the server and see what it is doing.
> >
> > rgds,
> >
> > Owen Boyle.
> >
> > > I am really surprised that you know the greek word for money. Have you
> > > visited my country?
> > Vevia, poli fores! Ego eimai Skotzezos kai m'arezi poli Elladha.
> >
> > ---------------------------------------------------------------------
> > The official User-To-User support forum of the Apache HTTP Server
Project.
> > See <URL:http://httpd.apache.org/userslist.html> for more info.
> > To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
> > For additional commands, e-mail: users-help@httpd.apache.org
> >
>
>
> -------
> http://www.freemail.gr - äùñåÜí õðçñåóßá çëåêôñïíéêïý ôá÷õäñïìåßïõ.
>
> ---------------------------------------------------------------------
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>


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On Thu, 7 Feb 2002 09:04:34 -0800
Scott Jeffries "Scott Jeffries" <sjjeffries@attbi.com> wrote:

> Greg
>
> Redhat, if I remember right redhat likes to by default block
> outside
> address from reaching a machine. Last time I ran redhat 7.1 I had
> to turn
> off either ipchains or iptables to get an outside connection to
> work. You
> might what to make sure that they aren't running before you jump
> into the
> apache config.
> The command to stop them if they are running.
> /etc/init.d/ipchains stop
> /etc/init.d/iptables stop
>
> Scott

Isn't turning off the firewall an unwise thing to do for security
purposes? If the problem is indeed the firewall, wouldn't it be
wiser to change the rules to allow the desired connection rather
than to open all the doors?

--
Raquel
============================================================
Americans cannot teach democracy to the world until they restore
their own.
--William Greider, journalist and author




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I mentioned turning off the firewall for debugging purposes. He can
always turn it back on later.

Scott

Raquel Rice wrote:

>On Thu, 7 Feb 2002 09:04:34 -0800
>Scott Jeffries "Scott Jeffries" <sjjeffries@attbi.com> wrote:
>
>>Greg
>>
>> Redhat, if I remember right redhat likes to by default block
>>outside
>>address from reaching a machine. Last time I ran redhat 7.1 I had
>>to turn
>>off either ipchains or iptables to get an outside connection to
>>work. You
>>might what to make sure that they aren't running before you jump
>>into the
>>apache config.
>>The command to stop them if they are running.
>>/etc/init.d/ipchains stop
>>/etc/init.d/iptables stop
>>
>>Scott
>>
>
>Isn't turning off the firewall an unwise thing to do for security
>purposes? If the problem is indeed the firewall, wouldn't it be
>wiser to change the rules to allow the desired connection rather
>than to open all the doors?
>



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I understand what you have proposed but can't I have my server running
without having to turn off the firewall?

Greg Liapis

----- Original Message -----
From: "Scott Jeffries" <sjjeffries@attbi.com>
To: <users@httpd.apache.org>
Sent: Thursday, February 07, 2002 9:34 PM
Subject: Re: Please help a newbie


> I mentioned turning off the firewall for debugging purposes. He can
> always turn it back on later.
>
> Scott
>
> Raquel Rice wrote:
>
> >On Thu, 7 Feb 2002 09:04:34 -0800
> >Scott Jeffries "Scott Jeffries" <sjjeffries@attbi.com> wrote:
> >
> >>Greg
> >>
> >> Redhat, if I remember right redhat likes to by default block
> >>outside
> >>address from reaching a machine. Last time I ran redhat 7.1 I had
> >>to turn
> >>off either ipchains or iptables to get an outside connection to
> >>work. You
> >>might what to make sure that they aren't running before you jump
> >>into the
> >>apache config.
> >>The command to stop them if they are running.
> >>/etc/init.d/ipchains stop
> >>/etc/init.d/iptables stop
> >>
> >>Scott
> >>
> >
> >Isn't turning off the firewall an unwise thing to do for security
> >purposes? If the problem is indeed the firewall, wouldn't it be
> >wiser to change the rules to allow the desired connection rather
> >than to open all the doors?
> >
>
>
>
> ---------------------------------------------------------------------
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maybe you should just try what he suggests as a test, to make sure that you
isolate the problem..

then you can learn IPTables and fix the firewall. Red Hat 7.2 comes witha
default install blocking most basic ports, there should be a GUI in KDE or
Gnome that will allow you to configure it. I have never used this, but I
believe the file it edits is called firewall-config. If you do a search for
it, you may be able to get an idea of what is being blocked. And edit it
manually...

Anybody out there have any suggestions on the best type of cluster to run, I
have about 100 websites between three machines.. I am trying to decide
between MOSIX and BeoWulf. Any practical experience advice would be greatly
appreciated...

Toodles,
Dan



----- Original Message -----
From: "Greg Liapis" <liapisg@freemail.gr>
To: <users@httpd.apache.org>
Sent: Thursday, February 07, 2002 1:59 PM
Subject: Re: Please help a newbie


> I understand what you have proposed but can't I have my server running
> without having to turn off the firewall?
>
> Greg Liapis
>
> ----- Original Message -----
> From: "Scott Jeffries" <sjjeffries@attbi.com>
> To: <users@httpd.apache.org>
> Sent: Thursday, February 07, 2002 9:34 PM
> Subject: Re: Please help a newbie
>
>
> > I mentioned turning off the firewall for debugging purposes. He can
> > always turn it back on later.
> >
> > Scott
> >
> > Raquel Rice wrote:
> >
> > >On Thu, 7 Feb 2002 09:04:34 -0800
> > >Scott Jeffries "Scott Jeffries" <sjjeffries@attbi.com> wrote:
> > >
> > >>Greg
> > >>
> > >> Redhat, if I remember right redhat likes to by default block
> > >>outside
> > >>address from reaching a machine. Last time I ran redhat 7.1 I had
> > >>to turn
> > >>off either ipchains or iptables to get an outside connection to
> > >>work. You
> > >>might what to make sure that they aren't running before you jump
> > >>into the
> > >>apache config.
> > >>The command to stop them if they are running.
> > >>/etc/init.d/ipchains stop
> > >>/etc/init.d/iptables stop
> > >>
> > >>Scott
> > >>
> > >
> > >Isn't turning off the firewall an unwise thing to do for security
> > >purposes? If the problem is indeed the firewall, wouldn't it be
> > >wiser to change the rules to allow the desired connection rather
> > >than to open all the doors?
> > >
> >
> >
> >
> > ---------------------------------------------------------------------
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Project.
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> >
>
>
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>
>


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Can't you turn off the firewall for 5 minutes to test
& see if that is the cause of your problem?


-=- RuneImp
ImpTech - Web Design, Hosting & Computer Tech
http://imptech.net
rune@imptech.net


----- Original Message -----
From: "Greg Liapis" <liapisg@freemail.gr>
To: <users@httpd.apache.org>
Sent: Thursday, February 07, 2002 11:59 AM
Subject: Re: Please help a newbie


I understand what you have proposed but can't I have my server running
without having to turn off the firewall?

Greg Liapis

----- Original Message -----
From: "Scott Jeffries" <sjjeffries@attbi.com>
To: <users@httpd.apache.org>
Sent: Thursday, February 07, 2002 9:34 PM
Subject: Re: Please help a newbie


> I mentioned turning off the firewall for debugging purposes. He can
> always turn it back on later.
>
> Scott
>
> Raquel Rice wrote:
>
> >On Thu, 7 Feb 2002 09:04:34 -0800
> >Scott Jeffries "Scott Jeffries" <sjjeffries@attbi.com> wrote:
> >
> >>Greg
> >>
> >> Redhat, if I remember right redhat likes to by default block
> >>outside
> >>address from reaching a machine. Last time I ran redhat 7.1 I had
> >>to turn
> >>off either ipchains or iptables to get an outside connection to
> >>work. You
> >>might what to make sure that they aren't running before you jump
> >>into the
> >>apache config.
> >>The command to stop them if they are running.
> >>/etc/init.d/ipchains stop
> >>/etc/init.d/iptables stop
> >>
> >>Scott
> >>
> >
> >Isn't turning off the firewall an unwise thing to do for security
> >purposes? If the problem is indeed the firewall, wouldn't it be
> >wiser to change the rules to allow the desired connection rather
> >than to open all the doors?
> >
>
>
>
> ---------------------------------------------------------------------
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----- Original Message -----
From: "Greg Liapis" <liapisg@freemail.gr>
To: <users@httpd.apache.org>
Sent: Thursday, February 07, 2002 6:28 AM
Subject: Re: Please help a newbie


> Thanks a lot for your response Owen. But the same thing happened
when I
> installed Apache in a computer which was connected to the network of
my
> University(with a static IP) and tried to access it from my home. Do
I have
> to change anything in the configuration files (ServerName or
something like
> that?).
> I am really surprised that you know the greek word for money. Have
you
> visited my country?
>
> Thanks Again
>
> Greg Liapis

I'd say the short answer is yes. You have to configure httpd.conf for
you environment.
>
> ----- Original Message -----
> From: "Owen Boyle" <obo@bourse.ch>
> To: <users@httpd.apache.org>
> Sent: Thursday, February 07, 2002 2:15 PM
> Subject: Re: Please help a newbie
>
>
> > > Greg Liapis wrote:
> > >
> > > Hi all.
> > > I am newbie to apache and linux and my question is probably
silly.
> > > I have installed apache1.3.22 in my system which runs redhat
linux 7.1
> > > and I haven't made any changes in the
> > > configuration files. When I type localhost in my browser's
address
> > > field everything goes fine and I can see the html pages I have
created
> > > in /usr/local/apache_1.3.22/htdocs. When I connect to the
internet via
> > > modem and get a dynamic IP address, I can also see the site I
have
> > > created by typing
> > > this IP address in the browser's address field.
> > > The problem is that when I try to access my site from a remote
> > > computer with this IP address, nothing happens. Could you please
help
> > > me?
> >
> > When you say "nothing happens", I assume you mean that the browser
sits
> > for a while then times-out. If so, this is typical behaviour of a
> > firewall dropping packets.
> >
> > Probably, your ISP is blocking incoming requests on port 80 to
your
> > address. That is, they allow you a client connection to the
internet but
> > do not allow you to operate as a server. To check this, look in
the
> > apache access_log while you try to hit it from a remote machine
(use
> > "tail -f access_log") - probably you will see no requests. You can
also
> > listen to your network card with "snoop". Login as root on your
server
> > and do:
> >
> > # snoop port 80
> >
> > You will probably see nothing coming in from external addresses.
Check
> > the man pages for snoop for more info.
> >
> > If the problem is your ISP then the only solution is to ask them
to
> > allow you incoming packets on port 80 - they may want poli lefta
for
> > this!
> >
> > Rgds,
> >
> > Owen Boyle.
> >
>
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--
Herb Stein
The Herb Stein Group
www.herbstein.com
herb@herbstein.com
314 952-4601



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