Doubt about RewriteCond?

your_shadow03 · 12-18-2009, 01:57 AM

Just had a few doubt regarding this one.I need help with apache RewriteCond stuff:

Code:

RewriteCond   %{HTTP_ADDR}   !217.220.[32-47]  
RewriteCond   %{HTTP_ADDR}   !217.220.[32][0-27]

All I need to know whats the above line means?
How can I add 217.220.32/27 to this list?

bathory · 12-18-2009, 02:34 AM

Hi,

There is no variable HTTP_ADDR. Maybe you mean the REMOTE_ADDR variable.

Quote:

RewriteCond %{HTTP_ADDR} !217.220.[32-47]
RewriteCond %{HTTP_ADDR} !217.220.[32][0-27]

The 2nd does not make sense, the first means all the subnets that are not in the range from 217.220.32.0/24 to 217.220.47.0/24.
Also it's better to include the IPs inside ^ and $ so they are not ambiguous. So in your case, use:

Code:

RewriteCond %{REMOTE_ADDR}       !^217.220.[32-47]$
RewriteCond %{REMOTE_ADDR}       !^217.220.32.\/27$

Regards

your_shadow03 · 12-18-2009, 02:51 AM

My Client has provided me with: 217.220.32.120/27?

Code:

How can I add 217.220.32.120/27 to this list?

your_shadow03 · 12-18-2009, 02:57 AM

I am sorry for the entry

Code:

 %{HTTP_ADDR}

Also, What does this mean?

Code:

RewriteCond %{REMOTE_ADDR}       !^217.220.32.\/27$

I am sorry I miswrote the following first line:

Code:

RewriteCond %{HTTP_ADDR} !217.220.120.[32-47]

What if I wrote

RewriteCond %{HTTP_ADDR} !217.220.120.[32][0-27]
Is this correct entry for 217.220.120.32/27?

bathory · 12-18-2009, 03:11 AM

Quote:

My Client has provided me with: 217.220.32.120/27?

Are you sure about that, because according to the subnet calculator the valid ips are 217.220.32.97 to 217.220.32.126.
If that's the case use either one of the following:

Code:

RewriteCond %{REMOTE_ADDR}       !^217.220.32.[97-126]$
RewriteCond %{REMOTE_ADDR}       !^217.220.32.120\/27$

Quote:

Also, What does this mean?
Code:

RewriteCond %{REMOTE_ADDR} !^217.220.32.\/27$

Means that the remote_addr is not in the subnet 217.220.32/27 (what you asked in your 1st post). The backslash "\" just escapes the forward slash "/"

your_shadow03 · 12-18-2009, 03:18 AM

Sorry for wrong IP.
The correct one was:

217.72.112.32/27
Can yu suggest for the same?

bathory · 12-18-2009, 08:33 AM

In that case use the following.

Code:

RewriteCond %{REMOTE_ADDR}       !^217.72.112.[33-62]$

I've removed the 2nd option, as I haven't found any examples using subnet notation in mod_rewrite, so I don't know if it really works.

your_shadow03 · 12-18-2009, 01:05 PM

Thanks.
I tried using:

Code:

RewriteCond %{REMOTE_ADDR}       !217.72.112.32[0-27]

And it worked!!!
Surprisingly!!!
But I do recommend client using what you suggested !!

bathory · 12-18-2009, 04:29 PM

Are you sure it's working?
Because your condition will match for IPs not in the range 217.72.112.320 to 217.72.112.3227. Since these IPs do not exist actually, it will match any other host!!!