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@@ -1,4 +1,4 @@
-Updated: August 18, 2010 (http://curl.haxx.se/docs/faq.html)
+Updated: September 7, 2010 (http://curl.haxx.se/docs/faq.html)
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@@ -49,6 +49,7 @@ FAQ
3.16 What certificates do I need when I use SSL?
3.17 How do I list the root dir of an FTP server?
3.18 Can I use curl to send a POST/PUT and not wait for a response?
+ 3.19 How do I get HTTP from a host using a specific IP address?
4. Running Problems
4.1 Problems connecting to SSL servers.
@@ -310,9 +311,9 @@ FAQ
as used by numerous applications that include libcurl binaries in their
distribution packages (like Adobe Acrobat Reader and Google Earth).
- More than 90 known named companies use curl in commercial environments and
- products. More than 100 known named open source projects depend on
- (lib)curl.
+ More than a hundred known named companies use curl in commercial
+ environments and products and more than a hundred known named open source
+ projects depend on (lib)curl.
In a poll on the curl web site mid-2005, more than 50% of the 300+ answers
estimated a user base of one million users or more.
@@ -637,6 +638,9 @@ FAQ
provide this in order to prove that you actually are who you claim to be.
If the server doesn't require this, you don't need a client certificate.
+ A client certificate is always used together with a private key, and the
+ private key has a pass phrase that protects it.
+
- Server certificate. The server you communicate with has a server
certificate. You can and should verify this certificate to make sure that
you are truly talking to the real server and not a server impersonating
@@ -644,8 +648,9 @@ FAQ
- Certificate Authority certificate ("CA cert"). You often have several CA
certs in a CA cert bundle that can be used to verify a server certificate
- that was signed by one of the authorities in the bundle. curl comes with a
- default CA cert bundle. You can override the default.
+ that was signed by one of the authorities in the bundle. curl does not
+ come with a CA cert bundle but most curl installs provide one. You can
+ also override the default.
The server certificate verification process is made by using a Certificate
Authority certificate ("CA cert") that was used to sign the server
@@ -676,6 +681,17 @@ FAQ
But you could easily write your own program using libcurl to do such stunts.
+ 3.19 How do I get HTTP from a host using a specific IP address?
+
+ For example, you may be trying out a web site installation that isn't yet in
+ the DNS. Or you have a site using multiple IP addresses for a given host
+ name and you want to address a specific one out of the set.
+
+ Set a custom Host: header that identifies the server name you want to reach
+ but use the target IP address in the URL:
+
+ curl --header "Host: www.example.com" http://127.0.0.1/
+
4. Running Problems
@@ -824,10 +840,8 @@ FAQ
4.9 Curl can't authenticate to the server that requires NTLM?
- This is supported in curl 7.10.6 or later. No earlier curl version knows
- of this magic. Later versions require the OpenSSL, GnuTLS or Microsoft
- Windows libraries to provide this functionality. Using the NSS library
- will not provide NTLM authentication functionality in curl.
+ NTLM support requires OpenSSL, GnuTLS, NSS or Microsoft Windows libraries at
+ build-time to provide this functionality.
NTLM is a Microsoft proprietary protocol. Proprietary formats are evil. You
should not use such ones.