Curl: Difference between revisions
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-f, --fail (HTTP) Fail silently (no output at all) on server errors | -f, --fail (HTTP) Fail silently (no output at all) on server errors | ||
== Connect to server by ip and pass hostname == | |||
Option #1: | |||
* Add to C:\windows\system32\drivers\etc\hosts | |||
Option #2: (will convert connection of example.com to altexample.com) <ref>https://serverfault.com/questions/443949/how-to-test-a-https-url-with-a-given-ip-address</ref> | |||
curl --connect-to example.com:80:altexample.com:80 http://example.com | |||
# shorthand: | |||
curl --connect-to ::altexample.com http://example.com | |||
curl --connect-to ::altexample.com:8080 http://example.com | |||
Option #3: | |||
curl --resolve <host:port:address> <URL> | |||
host: The hostname you want to use in the request. | |||
port: The port number for the connection. | |||
address: The IP address you want to connect to. | |||
URL: The URL you want to request, using the specified hostname. | |||
curl --resolve example.com:443:192.168.1.100 https://example.com | |||
:"This command will send a request to the IP address 192.168.1.100, but it will include example.com in the Host header, which is crucial for virtual hosting and TLS/SSL certificate validation." | |||
Option #4: (this does not seem to work??) | |||
curl [IP] -k -H 'Host: example.com' | |||
== Ignore SSL Revocation Check == | |||
<pre> | |||
C:\> curl -v -I https://github.com/ | |||
* Host github.com:443 was resolved. | |||
* IPv6: (none) | |||
* IPv4: 140.82.116.4 | |||
* Trying 140.82.116.4:443... | |||
* schannel: disabled automatic use of client certificate | |||
* ALPN: curl offers http/1.1 | |||
* schannel: next InitializeSecurityContext failed: CRYPT_E_NO_REVOCATION_CHECK (0x80092012) - The revocation function was unable to check revocation for the certificate. | |||
* closing connection #0 | |||
curl: (35) schannel: next InitializeSecurityContext failed: CRYPT_E_NO_REVOCATION_CHECK (0x80092012) - The revocation function was unable to check revocation for the certificate. | |||
</pre> | |||
Option #1 - brute force (Insecure): | |||
curl ---k -v -I https://github.com/ | |||
Option #2 - no revoke check (more secure): | |||
curl --ssl-no-revoke -v -I https://github.com/ | |||
Option #3 - best effort revoke check (best attempt secure): | |||
curl --ssl-revoke-best-effort -v -I https://github.com/ | |||
== keywords == | == keywords == | ||
Latest revision as of 00:46, 1 June 2026
Return status code only
curl -s -o /dev/null -w "%{http_code}" google.com
curl -s -o /dev/null -i -w "%{http_code}" google.com
curl -s -o /dev/null -I -w "%{http_code}" google.com
curl -s -o /dev/null -I -w "%{http_code}\n" google.com
ref: [1]
Return fail status code
curl --fail http://some-url.com echo $?
-f, --fail (HTTP) Fail silently (no output at all) on server errors
Connect to server by ip and pass hostname
Option #1:
- Add to C:\windows\system32\drivers\etc\hosts
Option #2: (will convert connection of example.com to altexample.com) [2]
curl --connect-to example.com:80:altexample.com:80 http://example.com # shorthand: curl --connect-to ::altexample.com http://example.com curl --connect-to ::altexample.com:8080 http://example.com
Option #3:
curl --resolve <host:port:address> <URL> host: The hostname you want to use in the request. port: The port number for the connection. address: The IP address you want to connect to. URL: The URL you want to request, using the specified hostname.
curl --resolve example.com:443:192.168.1.100 https://example.com
- "This command will send a request to the IP address 192.168.1.100, but it will include example.com in the Host header, which is crucial for virtual hosting and TLS/SSL certificate validation."
Option #4: (this does not seem to work??)
curl [IP] -k -H 'Host: example.com'
Ignore SSL Revocation Check
C:\> curl -v -I https://github.com/ * Host github.com:443 was resolved. * IPv6: (none) * IPv4: 140.82.116.4 * Trying 140.82.116.4:443... * schannel: disabled automatic use of client certificate * ALPN: curl offers http/1.1 * schannel: next InitializeSecurityContext failed: CRYPT_E_NO_REVOCATION_CHECK (0x80092012) - The revocation function was unable to check revocation for the certificate. * closing connection #0 curl: (35) schannel: next InitializeSecurityContext failed: CRYPT_E_NO_REVOCATION_CHECK (0x80092012) - The revocation function was unable to check revocation for the certificate.
Option #1 - brute force (Insecure):
curl ---k -v -I https://github.com/
Option #2 - no revoke check (more secure):
curl --ssl-no-revoke -v -I https://github.com/
Option #3 - best effort revoke check (best attempt secure):
curl --ssl-revoke-best-effort -v -I https://github.com/