Initial version.

Author: davidfstr

.gitignore

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+# Configuration
+nc-ddns.config.sh

README.md

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+# Namecheap Dynamic DNS Updater (Basic)
+
+Just a simple *bash + cURL* based updater for the Namecheap Dynamic DNS service.
+Works on macOS, probably Linux, and probably not Windows.
+
+## Configuration
+
+* Make a copy of the example configuration file `nc-ddns.config.example.sh` and 
+  name it `nc-ddns.config.sh`.
+* Fill in the configuration values in that file from 
+  Namecheap's web control panel:
+
+```
+NC_DDNS_HOST=@
+NC_DDNS_DOMAIN=mydomain.com
+NC_DDNS_PASSWORD=ddns_password
+```
+
+## Usage
+
+```
+$ ./nc-ddns.sh
+```
+
+## History
+
+This updater was written as an alternative to the [nc-ddns] updater,
+because I couldn't get that updater to work.
+
+[nc-ddns]: https://github.com/marcov/nc-ddns

nc-ddns.config.example.sh

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+NC_DDNS_HOST=@
+NC_DDNS_DOMAIN=mydomain.com
+NC_DDNS_PASSWORD=ddns_password

nc-ddns.sh

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+#!/usr/bin/env bash
+
+# Load configuration
+source nc-ddns.config.sh
+
+# Lookup my IP
+MY_IP=$(curl -fsSL "icanhazip.com")
+if [ $? -ne 0 ]; then
+    echo "*** IP lookup failed. Is the IP lookup service offline?"
+    exit 1
+fi
+
+# Formulate URL to update my IP in Namecheap, based on documentation:
+# https://www.namecheap.com/support/knowledgebase/article.aspx/29/11/how-do-i-use-a-browser-to-dynamically-update-the-hosts-ip/
+UPDATE_URL="https://dynamicdns.park-your-domain.com/update?host=${NC_DDNS_HOST}&domain=${NC_DDNS_DOMAIN}&password=${NC_DDNS_PASSWORD}&ip=${MY_IP}"
+
+# Update my IP in Namecheap
+STATUS_CODE=$(curl -o /dev/null -s -w "%{http_code}\n" "${UPDATE_URL}")
+if [ $STATUS_CODE -ne 200 ]; then
+    echo "*** Update IP failed. Is the configuration wrong?"
+    exit 1
+fi