getting error 403 Forbidden

[Shrink]

Hello guys,
I have installed new froum on subdomain. when i try to edit a post it gives following error

403 Forbidden
Forbidden

You don't have permission to access /index.php on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.

Not understand why this happens ?

[Kill Em All]

Double check to make sure all folders are CHMOD to 755 and all files to 644.

[Shrink]

checked but still facing the same problem

[Colin]

Do you have a mischievous .htaccess file in your forum or server root?

[Shrink]

Do you have a mischievous .htaccess file in your forum or server root?

Yes i have .htaccess file in my server root.

[Colin]

What are the contents?

[Shrink]

i tried to openn it with code editor & view but it shows empty two lines.

[Shrink]

i just found that this error is occure only when i try to post two tables in single  post. If we avoid only this the froum is working.
particulary when i m try to post following post

Code Select Expand

[table][tr]

[td][i][b][font=georgia][size=12pt] Physics[/size][/font][/b][/i][/td]
[td][i][b][u][color=Marron]   [url=http://gyaan.shrinkdworld.com/index.php?topic=9.0] :Info_Links: [/url][/color][/u] [/b][/i][/td]

[td][u][i][b][color=navy]     [url=http://gyaan.shrinkdworld.com/index.php?topic=8.0] :Browse_Topic:[/url][/color][/b][/i][/u][/td]
[/tr]
[/table]

Physics contians following branches
[list]
[li]Classical Physics[/li]
[li]Modern Physics[/li]
[li]Applied Physics[/li]
[li]Computational Physics[/li]
[li]Atomic Physics[/li]
[li]Nuclear Physics[/li]
[li]Partical Physics[/li]
[li]Thermodynamics[/li]
[li]Mechanics[/li]
[li]Electromagnetism[/li]


[/list]

[table]
[tr][td][b] Thermodynamics[/b] [/td]
    [td][i][b][u][color=Marron][url=http://] :Info_Links: [/url][/color][/u] [/b][/i] [/td]
    [td][u][i][b][color=navy]  [url=http://] :Browse_Topic:[/url][/color][/b][/i][/u] [/td]  [/tr][/table]



If u know more please post them in my request.

[mrintech]

Ask your webhost to TURN OFF mod_security for your domain name

Then test again

[Shrink]

Ask your webhost to TURN OFF mod_security for your domain name

Then test again

what is mod_security? Please give me some links where i can understad it.

[Colin]

If you don't know what it is then you probably don't have the ability to enable or disable it . Ask your host.

[Shrink]

If you don't know what it is then you probably don't have the ability to enable or disable it . Ask your host.

it is disable for my domain. it is also need to disable for my subdomian?
i want to learn about it that why i am asking about it
Now Mod_security also disable for all
I found one .htaccess file in my cache directory it contain following code.

Code Select Expand

<Files *>
Order Deny,Allow
Deny from all
</Files>

[MrPhil]

If your host if halfway decent, you will be able to turn on (and off) mod security on a directory-by-directory basis. Like anything else in .htaccess, it affects a directory and everything under it. If you turn it off in /, you should be able to turn it back on in /mysub.

The code from .htaccess you posted has nothing to do with mod security.

[Kill Em All]

You can read more about mod security here:
http://wiki.simplemachines.org/smf/Mod_security_-_Having_problems_with_mod_security

and Google can provide even more insight if interested.

[Shrink]

hey i don't knw  how this happen but now my problem is solved. Before two days my hosting provider tell me that all the file & folder permissions are correct also mod-security is also desiable for my subdomain also but still day before i am facing that problem. when i woke up today i try it once again it perfectly work. So don't kwnow how but problem is solved.
Thanks guys for such nice response

[Colin]

Fantastic. Stop by again if you anything else comes up.

[MrPhil]

Ah, isn't self-healing code wonderful?