1--- 2c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al. 3SPDX-License-Identifier: curl 4Long: insecure 5Short: k 6Help: Allow insecure server connections 7Protocols: TLS SFTP SCP 8Category: tls sftp scp 9Added: 7.10 10Multi: boolean 11See-also: 12 - proxy-insecure 13 - cacert 14 - capath 15Example: 16 - --insecure $URL 17--- 18 19# `--insecure` 20 21By default, every secure connection curl makes is verified to be secure before 22the transfer takes place. This option makes curl skip the verification step 23and proceed without checking. 24 25When this option is not used for protocols using TLS, curl verifies the 26server's TLS certificate before it continues: that the certificate contains 27the right name which matches the hostname used in the URL and that the 28certificate has been signed by a CA certificate present in the cert store. See 29this online resource for further details: 30**https://curl.se/docs/sslcerts.html** 31 32For SFTP and SCP, this option makes curl skip the *known_hosts* verification. 33*known_hosts* is a file normally stored in the user's home directory in the 34".ssh" subdirectory, which contains hostnames and their public keys. 35 36**WARNING**: using this option makes the transfer insecure. 37 38When curl uses secure protocols it trusts responses and allows for example 39HSTS and Alt-Svc information to be stored and used subsequently. Using 40--insecure can make curl trust and use such information from malicious 41servers. 42
