How can I get my external IP address in bash?
I'd recommend getting it directly from a DNS server.
Most of the answers here all go over HTTP to a remote server. Some of
them require parsing of the output, or rely on the User-Agent header to
make the server respond in plain text. They also change quite
frequently (go down, change their name, put up ads, might change output
format etc.).
- The DNS response protocol is standardised (the format will stay compatible).
- Historically DNS services (OpenDNS, Google Public DNS,
..) tend survive much longer and are more stable, scalable and
generally looked after than whatever new hip whatismyip.com HTTP
service is hot today.
- (for those geeks that care about micro-optimisation), this method
should be inherently faster (be it only by a few micro seconds).
Using
dig with
OpenDNS as resolver:
dig +short myip.opendns.com @resolver1.opendns.com
Perhaps alias it in your
bashrc so it's easy to remember
alias wanip='dig +short myip.opendns.com @resolver1.opendns.com'
Responds with a plain ip address:
$ wanip
80.100.192.168
found at: http://unix.stackexchange.com/questions/22615/...
