HTTP over PPPoE???

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Hi all,

=20

I meet a problem about HTTP over PPPoE. I describe my question firstly, =
and thanks for your help.

=20

I establish a HTTP Server Apache/2.2.9 in Unix, and it connects to =
Internet by PPPoE.

Then, I use other pc in WAN to download a file from Server.

After downloading, I got the wrong content of that file, such as...

=20

Original File: abcdefg

Downloaded File: abccdefg

=20

I also try to capture packages, and I see a strange thing...

Package1's Content: abc

Package2's Content: cdefg

=20

The content of Package2 should be defg, not cdefg. The start point of =
Package2 is wrong, so lead to content error.

But interesting, this only happens when...

1. Use HTTP (if I use https, it is ok!)

2. Download a bigger file. (actually, if I download small files, it =
is ok!)

For example,=20

Download 8038 bytes file =E8 SUCCESS

Download 38058 bytes file =E8 FAIL

3. If I use pc in the same LAN with my Server, and download it =
directly, it is ok! (not via PPPoE)

=20

Does anyone has any idea? Or who can tell me how to find where httpd do =
sending file in source code?

Thanks !!

=20

Aslan

2010/01/11


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Re: HTTP over PPPoE???

On 01/11/2010 01:27 PM, ChiaTzung Liu wrote:
> Hi all,
>
> I meet a problem about HTTP over PPPoE. I describe my question firstly,
> and thanks for your help.
>
> I establish a HTTP Server Apache/2.2.9 in Unix, and it connects to
> Internet by PPPoE.
>
> Then, I use other pc in WAN to download a file from Server.
>
> After downloading, I got the wrong content of that file, such as…
>
> Original File: abcdefg
>
> Downloaded File: abccdefg
>
> I also try to capture packages, and I see a strange thing…
>
> Package1’s Content: abc
>
> Package2’s Content: cdefg
>
> The content of Package2 should be defg, not cdefg. The start point of
> Package2 is wrong, so lead to content error.
>
> But interesting, this only happens when…
>
> 1. Use HTTP (if I use https, it is ok!)
>
> 2. Download a bigger file. (actually, if I download small files, it is ok!)
>
> For example,
>
> Download 8038 bytes file è SUCCESS
>
> Download 38058 bytes file è FAIL
>
> 3. If I use pc in the same LAN with my Server, and download it directly,
> it is ok! (not via PPPoE)
>
> Does anyone has any idea? Or who can tell me how to find where httpd do
> sending file in source code?
>
> Thanks !!
>
> Aslan
>
> 2010/01/11
>

Something is modifying your request. Not sure, but can be a proxy.

--
Nilesh Govindarajan
Site & Server Adminstrator
www.itech7.com

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RE: HTTP over PPPoE???

But I don't enable proxy.c in httpd. In addition, these captured =
packages is captured in LAN directly, not in WAN.
So I think not proxy issue.

-----Original Message-----
From: Nilesh Govindarajan [mailto:lists@itech7.com]=20
Sent: Monday, January 11, 2010 4:13 PM
To: users@httpd.apache.org
Subject: Re: [users@httpd] HTTP over PPPoE???

On 01/11/2010 01:27 PM, ChiaTzung Liu wrote:
> Hi all,
>
> I meet a problem about HTTP over PPPoE. I describe my question =
firstly,
> and thanks for your help.
>
> I establish a HTTP Server Apache/2.2.9 in Unix, and it connects to
> Internet by PPPoE.
>
> Then, I use other pc in WAN to download a file from Server.
>
> After downloading, I got the wrong content of that file, such as...
>
> Original File: abcdefg
>
> Downloaded File: abccdefg
>
> I also try to capture packages, and I see a strange thing...
>
> Package1's Content: abc
>
> Package2's Content: cdefg
>
> The content of Package2 should be defg, not cdefg. The start point of
> Package2 is wrong, so lead to content error.
>
> But interesting, this only happens when...
>
> 1. Use HTTP (if I use https, it is ok!)
>
> 2. Download a bigger file. (actually, if I download small files, it is =
ok!)
>
> For example,
>
> Download 8038 bytes file =E8 SUCCESS
>
> Download 38058 bytes file =E8 FAIL
>
> 3. If I use pc in the same LAN with my Server, and download it =
directly,
> it is ok! (not via PPPoE)
>
> Does anyone has any idea? Or who can tell me how to find where httpd =
do
> sending file in source code?
>
> Thanks !!
>
> Aslan
>
> 2010/01/11
>

Something is modifying your request. Not sure, but can be a proxy.

--=20
Nilesh Govindarajan
Site & Server Adminstrator
www.itech7.com

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Project.
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Re: HTTP over PPPoE???

On 01/11/2010 01:48 PM, ChiaTzung Liu wrote:
> But I don't enable proxy.c in httpd. In addition, these captured packages is captured in LAN directly, not in WAN.
> So I think not proxy issue.
>
> -----Original Message-----
> From: Nilesh Govindarajan [mailto:lists@itech7.com]
> Sent: Monday, January 11, 2010 4:13 PM
> To: users@httpd.apache.org
> Subject: Re: [users@httpd] HTTP over PPPoE???
>
> On 01/11/2010 01:27 PM, ChiaTzung Liu wrote:
>> Hi all,
>>
>> I meet a problem about HTTP over PPPoE. I describe my question firstly,
>> and thanks for your help.
>>
>> I establish a HTTP Server Apache/2.2.9 in Unix, and it connects to
>> Internet by PPPoE.
>>
>> Then, I use other pc in WAN to download a file from Server.
>>
>> After downloading, I got the wrong content of that file, such as...
>>
>> Original File: abcdefg
>>
>> Downloaded File: abccdefg
>>
>> I also try to capture packages, and I see a strange thing...
>>
>> Package1's Content: abc
>>
>> Package2's Content: cdefg
>>
>> The content of Package2 should be defg, not cdefg. The start point of
>> Package2 is wrong, so lead to content error.
>>
>> But interesting, this only happens when...
>>
>> 1. Use HTTP (if I use https, it is ok!)
>>
>> 2. Download a bigger file. (actually, if I download small files, it is ok!)
>>
>> For example,
>>
>> Download 8038 bytes file è SUCCESS
>>
>> Download 38058 bytes file è FAIL
>>
>> 3. If I use pc in the same LAN with my Server, and download it directly,
>> it is ok! (not via PPPoE)
>>
>> Does anyone has any idea? Or who can tell me how to find where httpd do
>> sending file in source code?
>>
>> Thanks !!
>>
>> Aslan
>>
>> 2010/01/11
>>
>
> Something is modifying your request. Not sure, but can be a proxy.
>

What do you see in accesslog ? The requested file or something else ?

--
Nilesh Govindarajan
Site & Server Adminstrator
www.itech7.com

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RE: HTTP over PPPoE???

Request a file, something like "GET ...."
In addition, if Server connects to the other PPPoE Server, it is ok..

For example...
Server --> self_PPPoE Server --> ISP PPPoE Server (PASS)
Server --> ISP PPPoE Server (FAIL)

-----Original Message-----
From: Nilesh Govindarajan [mailto:lists@itech7.com]=20
Sent: Monday, January 11, 2010 4:20 PM
To: users@httpd.apache.org
Subject: Re: [users@httpd] HTTP over PPPoE???

On 01/11/2010 01:48 PM, ChiaTzung Liu wrote:
> But I don't enable proxy.c in httpd. In addition, these captured =
packages is captured in LAN directly, not in WAN.
> So I think not proxy issue.
>
> -----Original Message-----
> From: Nilesh Govindarajan [mailto:lists@itech7.com]
> Sent: Monday, January 11, 2010 4:13 PM
> To: users@httpd.apache.org
> Subject: Re: [users@httpd] HTTP over PPPoE???
>
> On 01/11/2010 01:27 PM, ChiaTzung Liu wrote:
>> Hi all,
>>
>> I meet a problem about HTTP over PPPoE. I describe my question =
firstly,
>> and thanks for your help.
>>
>> I establish a HTTP Server Apache/2.2.9 in Unix, and it connects to
>> Internet by PPPoE.
>>
>> Then, I use other pc in WAN to download a file from Server.
>>
>> After downloading, I got the wrong content of that file, such as...
>>
>> Original File: abcdefg
>>
>> Downloaded File: abccdefg
>>
>> I also try to capture packages, and I see a strange thing...
>>
>> Package1's Content: abc
>>
>> Package2's Content: cdefg
>>
>> The content of Package2 should be defg, not cdefg. The start point of
>> Package2 is wrong, so lead to content error.
>>
>> But interesting, this only happens when...
>>
>> 1. Use HTTP (if I use https, it is ok!)
>>
>> 2. Download a bigger file. (actually, if I download small files, it =
is ok!)
>>
>> For example,
>>
>> Download 8038 bytes file =E8 SUCCESS
>>
>> Download 38058 bytes file =E8 FAIL
>>
>> 3. If I use pc in the same LAN with my Server, and download it =
directly,
>> it is ok! (not via PPPoE)
>>
>> Does anyone has any idea? Or who can tell me how to find where httpd =
do
>> sending file in source code?
>>
>> Thanks !!
>>
>> Aslan
>>
>> 2010/01/11
>>
>
> Something is modifying your request. Not sure, but can be a proxy.
>

What do you see in accesslog ? The requested file or something else ?

--=20
Nilesh Govindarajan
Site & Server Adminstrator
www.itech7.com

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Re: HTTP over PPPoE???

On Mon, Jan 11, 2010 at 3:54 AM, ChiaTzung Liu
wrote:
> Request a file, something like "GET ...."
> In addition, if Server connects to the other PPPoE Server, it is ok..
>
> For example...
> Server --> self_PPPoE Server --> ISP PPPoE Server (PASS)
> Server --> ISP PPPoE Server (FAIL)


I would naively guess that it's an MTU problem. Have you tried
setting it comically low?

--
Eric Covener
covener@gmail.com

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RE: HTTP over PPPoE???

Yes, I also tested MTU 1280, 1480 and 1492.
And all of these don't work....

-----Original Message-----
From: Eric Covener [mailto:covener@gmail.com]=20
Sent: Monday, January 11, 2010 8:51 PM
To: users@httpd.apache.org
Subject: Re: [users@httpd] HTTP over PPPoE???

On Mon, Jan 11, 2010 at 3:54 AM, ChiaTzung Liu
wrote:
> Request a file, something like "GET ...."
> In addition, if Server connects to the other PPPoE Server, it is ok..
>
> For example...
> Server --> self_PPPoE Server --> ISP PPPoE Server (PASS)
> Server --> ISP PPPoE Server (FAIL)


I would naively guess that it's an MTU problem. Have you tried
setting it comically low?

--=20
Eric Covener
covener@gmail.com

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Re: HTTP over PPPoE???

On 11.01.10 16:18, ChiaTzung Liu wrote:
> But I don't enable proxy.c in httpd. In addition, these captured packages is captured in LAN directly, not in WAN.
> So I think not proxy issue.

do you mean, both original and downloaded are captured in LAN and they
differ?

isn't it possible that there is intercepting (often incorrectly called
"transparent") proxy somewhere in between?
--
Matus UHLAR - fantomas, uhlar@fantomas.sk ; http://www.fantomas.sk/
Warning: I wish NOT to receive e-mail advertising to this address.
Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu.
I wonder how much deeper the ocean would be without sponges.

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RE: HTTP over PPPoE???

I don't think so. I try to draw my environment as following...

WebServer --SendData--> HUB --SendData--> PPPoE Router
--SendData(ISP)--> Client
|
|
-----> Capture packages by Wireshark

And the captured data is different from the original in WebServer.
Happen some overlaps.=20

However, if I build PPPoE Server by myself on Linux, it is OK!!!=20
Has any configuration in PPPoE Server may lead to this situation?
I think the root cause maybe is the configuration in ISP's PPPoE Server.

Does anyone has idea?

-----Original Message-----
From: Matus UHLAR - fantomas [mailto:uhlar@fantomas.sk]=20
Sent: Wednesday, January 13, 2010 6:03 PM
To: users@httpd.apache.org
Subject: Re: [users@httpd] HTTP over PPPoE???

On 11.01.10 16:18, ChiaTzung Liu wrote:
> But I don't enable proxy.c in httpd. In addition, these captured
packages is captured in LAN directly, not in WAN.
> So I think not proxy issue.

do you mean, both original and downloaded are captured in LAN and they
differ?

isn't it possible that there is intercepting (often incorrectly called
"transparent") proxy somewhere in between?=20
--=20
Matus UHLAR - fantomas, uhlar@fantomas.sk ; http://www.fantomas.sk/
Warning: I wish NOT to receive e-mail advertising to this address.
Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu.
I wonder how much deeper the ocean would be without sponges.=20

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Re: HTTP over PPPoE???

2010/1/13 ChiaTzung Liu :
> I don't think so. I try to draw my environment as following...
>
> WebServer =A0--SendData--> =A0HUB =A0--SendData--> =A0PPPoE Router
> --SendData(ISP)--> =A0Client
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 |
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 |
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 -----> Capture packages b=
y Wireshark
>
> And the captured data is different from the original in WebServer.
> Happen some overlaps.
>
> However, if I build PPPoE Server by myself on Linux, it is OK!!!

You mean if the PPPoE connection is made by your server instead of the rout=
er?
Well isn't it then ovious? The problem is in the router.
What router is it? Does it connect to some xDSL modem?
Was it provided by the ISP (the router)?
Try to turn off all firewall and packet inspection on the router.

Regards,
David

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RE: HTTP over PPPoE???

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