Don't show warning page when page was blocked?

V@no · Jul 23, 2023

Hello.

When a page was blocked by parental controls, it shows a warning webpage explaining what happened, providing WAY TOO MUCH information...
How to prevent this from showing?

I just want certain websites be unreachable, period.

Thank you.

RMerlin · Jul 23, 2023

You can't.

Ripshod · Jul 23, 2023

@RMerlin , would skynet do this?

V@no · Jul 23, 2023

Is it possible do something with a plugin or something?

ColinTaylor · Jul 23, 2023

V@no said:
Is it possible do something with a plugin or something?

I'd guess that you could probably create your own version of /www/blocking.asp and overmount the original when the router boots up.

Viktor Jaep · Jul 23, 2023

Ripshod said:
@RMerlin , would skynet do this?

Skynet simply compares and blocks IPs that are present in the IP table rules... it doesn't seem to care who or what is doing it, and isn't keep track of any particular session in order to redirect people to a blocking page.

V@no · Jul 23, 2023

ColinTaylor said:
I'd guess that you could probably create your own version of /www/blocking.asp and overmount the original when the router boots up.

That sound easy, but how would I mount it? I've tried edit it derectly, but failed due to read-only file system

ColinTaylor · Jul 23, 2023

V@no said:
That sound easy, but how would I mount it? I've tried edit it derectly, but failed due to read-only file system

Take a copy of that file, edit it, and save it to somewhere in jffs, e.g. /jffs/scripts/blocking.asp.

Then put an appropriate mount command in services-start, e.g.

Code:

mount -o bind /jffs/scripts/blocking.asp /www/blocking.asp

P.S. I haven't tested this so YMMV.

V@no · Jul 23, 2023

Thank you, this is working, not ideal because it still shows different address in the url bar, but at least the message can be modified/removed.

Even though it's .asp file, I gather it's not ASP language used in Miscrosoft IIS, but does it allow modify/send http headers too?

Yota · Jul 23, 2023

RMerlin said:
You can't.

Actually you can. Go to Administration - System, then Enable Access Restrictions, fill in the IP addresses that are allowed to access the router, any IP addresses outside the whitelist will be blocked, so they will not enter the blocked page.

Ripshod · Jul 23, 2023

Yota said:
Actually you can. Go to Administration - System, then Enable Access Restrictions, fill in the IP addresses that are allowed to access the router, any IP addresses outside the whitelist will be blocked, so they will not enter the blocked page.

Isn't that setting only relevant for WAN access?

Yota · Jul 23, 2023

Ripshod said:
Isn't that setting only relevant for WAN access?

It will use iptables to restrict access to the router from any IP address outside the whitelist, whether it is the WAN side or the LAN side.

V@no · Jul 23, 2023

So far I ended up using this as `blocking.asp`:

HTML:

<head>
<title>404 Not Found</title>
</head>
<body>
<h1>Not Found</h1>
<p>The requested URL was not found on this server.</p>
<hr>
<address><script>
const address = <% bwdpi_redirect_info(); %>;
document.write(address&&address[1]||'<% get_parameter("domain"); %>');
//history.go(-1); //redirect to previous page
</script></address>
</body>

@RMerlin
This whole page redirection routine doesn't work on https sites with error `ERR_SSL_PROTOCOL_ERROR`

RMerlin · Jul 23, 2023

V@no said:
This whole page redirection routine doesn't work on https sites with error `ERR_SSL_PROTOCOL_ERROR`

I know. Nothing I can do about.

V@no · Jul 23, 2023

RMerlin said:
I know. Nothing I can do about.

Can the redirection be done via http headers instead of html?

RMerlin · Jul 23, 2023

V@no said:
Can the redirection be done via http headers instead of html?

The redirection requires a connection to the httpd daemon, which will always be the same protocol (http or https) as the original request. Only after that connection is the router able to apply the redirection (301). Therefore, you will always end up with the protocol error issue.

V@no · Jul 24, 2023

Sounds like the way URL Block in firewall works is a better alternative than this redirection...

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