resolve.md 1.7 KB
c: Copyright (C) Daniel Stenberg, daniel@haxx.se, et al. SPDX-License-Identifier: curl Long: resolve Arg: <[+]host:port:addr[,addr]...> Help: Resolve the host+port to this address Added: 7.21.3 Category: connection dns Multi: append See-also:
- connect-to
- alt-svc Example:
- --resolve example.com:443:127.0.0.1 $URL ---
--resolve
Provide a custom address for a specific host and port pair. Using this, you can make the curl requests(s) use a specified address and prevent the otherwise normally resolved address to be used. Consider it a sort of /etc/hosts alternative provided on the command line. The port number should be the number used for the specific protocol the host is used for. It means you need several entries if you want to provide address for the same host but different ports.
By specifying '*' as host you can tell curl to resolve any host and specific port pair to the specified address. Wildcard is resolved last so any --resolve with a specific host and port is used first.
The provided address set by this option is used even if --ipv4 or --ipv6 is set to make curl use another IP version.
By prefixing the host with a '+' you can make the entry time out after curl's default timeout (1 minute). Note that this only makes sense for long running parallel transfers with a lot of files. In such cases, if this option is used curl tries to resolve the host as it normally would once the timeout has expired.
Support for providing the IP address within [brackets] was added in 7.57.0.
Support for providing multiple IP addresses per entry was added in 7.59.0.
Support for resolving with wildcard was added in 7.64.0.
Support for the '+' prefix was was added in 7.75.0.