Etiket: software

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Web site administrators like to know the IP addresses used by Google when it is spidering. You can also sometimes use Google’s IP address to reach the site www.google.com if the domain cannot be contacted by its name.

Answer:

The following IP address ranges belong to Google:

64.233.160.0 – 64.233.191.255
66.102.0.0 – 66.102.15.255
66.249.64.0 – 66.249.95.255
72.14.192.0 – 72.14.255.255
74.125.0.0 – 74.125.255.255
209.85.128.0 – 209.85.255.255
216.239.32.0 – 216.239.63.255
Like many popular Web sites, Google utilizes multiple Internet servers to handle incoming requests to its Web site. Instead of entering http://www.google.com/ into the browser, a person can enter http:// followed by one of the above addresses, for example:
http://74.125.224.72/
Only certain addresses from Google’s pool will work depending on the physical location of the browser.
Besides serving www.google.com, some of the Google’s IP addresses above are utilized by its Googlebot Web crawlers.

~/.freerdp/known_hosts dosyasındaki girdiyi silince çalışıyor.

DNS Rebinding Protections

pfSense includes two built in methods of protection against DNS rebinding attacks. These measures are described below.
DNS forwarder

The DNS forwarder (dnsmasq) uses the option –stop-dns-rebind by default, which rejects and logs addresses from upstream nameservers which are in the private IP ranges. In the most common usage, this is filtering DNS responses you’re getting from the Internet to prevent DNS rebinding attacks. Internet DNS responses should never come back with a private IP, hence it’s safest to block this.

Note this is automatically overridden for domains in the DNS forwarder’s domain override list, as the most common usage of that functionality is to resolve internal DNS hostnames.
Web interface protection

For those not using the DNS forwarder and already having that protection, and as an additional layer of checks, the web interface will block attempts to access it via an unknown hostname. It will display “Potential DNS Rebind Attack Detected” and drop any request. By default, only the hostname and domain configured under System>General Setup are accepted. For instance if you have firewall.example.com configured as your system’s hostname, and you try to browse to it using fw1.example.com, that attempt will be rejected. You can add additional hostnames under System>Advanced, “Alternate Hostnames”.

Note you can log in using the IP address of the system rather than the hostname should you find yourself unable to log in with this message. Then configure the hostname(s) accordingly and you will be able to log in using the hostname

http://pyload.org/
flashgot

sudo update-alternatives --config x-www-browser

If we add the repository http://www.debian-multimedia.org on Debian testing
it can happen that when we try to execute the comand apt-get update, we see a GPG error:

W: GPG error: http://www.debian-multimedia.org squeeze Release:
The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY 07DC563D1F41B907

To solve this problem we need to install the debian-keyring package

# apt-get install debian-keyring

And then execute this command:

# gpg –keyring /usr/share/keyrings/debian-keyring.gpg -a –export 07DC563D1F41B907 |apt-key add –

After that, when we try to execute apt-get update, there will be no the GPG error anymore.