Get public IP from bash

itsdeadjim

In case anyone finds this useful, sometimes I need to get my public IP from bash or scripts and I use api.myip.com, only because it's easy to remember.

But more and more often lately, some IPs are blocked there and get http errors, so I bought a cheap domain and I woke up a $3/year @natvps_uk from idling, and..

wget -4 -qO- myip.cam
or for ipv6
wget -6 -qO- myip.cam

(or curl -4L myip.cam if curl is your thing)

Wonder_Woman

I've always used ifconfig.me, it's quite easy to remember. I use da.gd/ip for IPv6 though.

itsdeadjim

@Wonder_Woman said:
I've always used ifconfig.me, it's quite easy to remember. I use da.gd/ip for IPv6 though.

Yeah I wouldn't remember da.gd/ip even if my life was depending on it

Wonder_Woman

@itsdeadjim said:

@Wonder_Woman said:
I've always used ifconfig.me, it's quite easy to remember. I use da.gd/ip for IPv6 though.

Yeah I wouldn't remember da.gd/ip even if my life was depending on it

That's very true, I often bungle the letters up myself...

adwsislife

@itsdeadjim said:
In case anyone finds this useful, sometimes I need to get my public IP from bash or scripts and I use api.myip.com, only because it's easy to remember.

But more and more often lately, some IPs are blocked there and get http errors, so I bought a cheap domain and I woke up a $3/year @natvps_uk from idling, and..

wget -4 -qO- myip.cam
or for ipv6
wget -6 -qO- myip.cam

(or curl -4L myip.cam if curl is your thing)

I need to check IPs of VPN docker container to see if IP really changed or not.
I use
curl https://ifconfig.co/ip for ipv4
curl -6 https://ifconfig.co/ip for ipv6
But I could not remember it. I always copy paste from a txt file.

Your's is quite easy to remember.
This will be quite handy.
Thanks for it

BTW
curl -4L myip.cam is for IPv4 I guess?
What's curl command for IPv6 ?

Sakura

ip.sb is also a good choice.

nightcat

https://4.ident.me for ipv4
https://6.ident.me for ipv6

itsdeadjim

@adwsislife said:
BTW
curl -4L myip.cam is for IPv4 I guess?
What's curl command for IPv6 ?

curl -6L myip.cam

Btw, the -L is needed because nat http proxy redirects http to https.
If I find a vps with a public IPv4 for under $10/year, I will have both 443 and 80 reply, so -L will not be needed

@nightcat said:
https://4.ident.me for ipv4
https://6.ident.me for ipv6

Good idea, I also enabled

curl -L 4.myip.cam
curl -L 6.myip.cam

carlin0

curl -s https://checkip.amazonaws.com

ralf

https://canhazip.com/

ralf

@itsdeadjim said:
But more and more often lately, some IPs are blocked there and get http errors, so I bought a cheap domain and I woke up a $3/year @natvps_uk from idling, and..

It's worth reading about previous people who've run these kinds of service. Once they got popular, they start consuming a lot of bandwidth, so it might not be best to advertise it too widely... e.g. the one I just posted: https://blog.apnic.net/2021/06/17/how-a-small-free-ip-tool-survived/

itsdeadjim

@ralf said:

@itsdeadjim said:
But more and more often lately, some IPs are blocked there and get http errors, so I bought a cheap domain and I woke up a $3/year @natvps_uk from idling, and..

It's worth reading about previous people who've run these kinds of service. Once they got popular, they start consuming a lot of bandwidth, so it might not be best to advertise it too widely... e.g. the one I just posted: https://blog.apnic.net/2021/06/17/how-a-small-free-ip-tool-survived/

Lol crazy, I wouldn't expect that. Thanks!

And this is why we can't have nice things.

Fritz

@ralf said:
https://canhazip.com/

What a weird name, never use it before.

yoursunny

curl -4 icanhazip.com
curl -6 icanhazip.com

These are owned by Cloudflare and operated on Workers platform
https://major.io/2021/06/06/a-new-future-for-icanhazip/

ralf

@Fritz said:

@ralf said:
https://canhazip.com/

What a weird name, never use it before.

https://en.wikipedia.org/wiki/I_Can_Has_Cheezburger?

It was the dominant meme on the internet for about 6 months about 15 years ago.

taizi

ipinfo.io

qeba

If you're bored, then try this:

https://myip.wtf/

 curl myip.wtf/json

shallow

bash?
Real G's use zsh

havoc

You can set up your own service via cf workers too

Only gotcha is it returns whatever resolves faster...so sometimes ipv4 sometimes 6

xleet

@yoursunny said:

curl -4 icanhazip.com
curl -6 icanhazip.com

These are owned by Cloudflare and operated on Workers platform
https://major.io/2021/06/06/a-new-future-for-icanhazip/

An interesting, educational, and entertaining story. Thanks for sharing.

tjn

@yoursunny said:
These are owned by Cloudflare and operated on Workers platform
https://major.io/2021/06/06/a-new-future-for-icanhazip/

This is so cool!

bruh21

@itsdeadjim said:
If I find a vps with a public IPv4 for under $10/year, I will have both 443 and 80 reply, so -L will not be needed

https://cloudserver.net/billing/index.php?rp=/store/custom-packages/leb-1gb-annual-plan

FatGrizzly

curl ipinfo.io
curl v6.ipinfo (v6)

itsdeadjim

@bruh21 said:

@itsdeadjim said:
If I find a vps with a public IPv4 for under $10/year, I will have both 443 and 80 reply, so -L will not be needed

https://cloudserver.net/billing/index.php?rp=/store/custom-packages/leb-1gb-annual-plan

Thanks, It turned out I had another one with a public IP that was auto-renewing idling so I just moved the service there.

Finally, the following requests are possible

curl myip.cam
curl 4.myip.cam
curl 6.myip.cam
curl -4 myip.cam
curl -6 myip.cam

By the way the service is a quick 'n' dirty custom C# async web-server behind an nginx reverse proxy. It seems that it can do 1-1.5k requests per second without much of trouble. (famous last words)

itsdeadjim

@shallow said:
bash?
Real G's use zsh

Yeah good point. I use bash so long that it's become a synonym for terminal

atomi

@itsdeadjim said:

By the way the service is a quick 'n' dirty custom C# async web-server behind an nginx reverse proxy. It seems that it can do 1-1.5k requests per second without much of trouble. (famous last words)

You could do it with pure nginx
location / { default_type text/plain; return 200 "$remote_addr"; }

shallow

@atomi said: You could do it with pure nginx
location / { default_type text/plain; return 200 "$remote_addr"; }

I remember a few years back I wanted to do this exact thing, a simple text output ip lookup. It seemed so simple, but wasn't (for me). I wish I knew about this little nginx trick then.

tjn

You can do it in Caddy with something that looks like:

yourdomain.com {
    templates
    header Content-Type text/plain
    respond "{{.RemoteIP}}"
}

alt

@tjn said:
You can do it in Caddy with something that looks like:

yourdomain.com {
    templates
    header Content-Type text/plain
    respond "{{.RemoteIP}}"
}

Oh, I did that same thing
https://geoip.mxtrans.net/ip for plain ip return,
https://geoip.mxtrans.net/json for geoip json format.
Also short for ip.mx.sb, but you need add -L for redirection.
curl -L ip.mx.sb

noisycode

@Wonder_Woman said:
I've always used ifconfig.me, it's quite easy to remember. I use da.gd/ip for IPv6 though.

Yeah, I've been using ifconfig.me for years. It's neat and well enough for me.

rcy026

@atomi said:
You could do it with pure nginx
location / { default_type text/plain; return 200 "$remote_addr"; }

I have used a very simple php script for years to accomplish just this, I cant believe I did not think of doing it this way instead.
It's just so simple it's brilliant, thank you.

ehab

@atomi said:

is there "the simple" way to show all the payload... i mean if i did a get/post request , i am interested in seeing in json format the payload "echo back in json"

atomi

@ehab said:

@atomi said:

is there "the simple" way to show all the payload... i mean if i did a get/post request , i am interested in seeing in json format the payload "echo back in json"

well there is echo module for nginx which definitely help you with more complex json. If all you want is IP in json format you could try something like this with pure nginx(untested)

location /json {
  default_type application/json;
  return 200 '{"ipaddress":"'$remote_addr'"}';
}

lebuser

It's also possible via DNS:

For IPv4:

dig -4 +short -t a myip.opendns.com @resolver1.opendns.com

And for IPv6:

dig -6 +short -t aaaa myip.opendns.com @resolver1.opendns.com

Shot²

host -4 myip.opendns.com resolver1.opendns.com
host -6 myip.opendns.com resolver1.opendns.com

ByteVirt

curl ip.sb

intermall

curl ipinfo.io is the most useful

dfroe

You can also avoid all the HTTP 'overhead' by using a simple DNS query to achieve the same:

alias myip4="dig @208.67.220.220  @208.67.222.222  myip.opendns.com A    +short"
alias myip6="dig @2620:119:35::35 @2620:119:53::53 myip.opendns.com AAAA +short"