Add ability to set passive address

README.md

@@ -30,6 +30,9 @@ which is in the _whois_ debian package.
 
 - `FTP_CHOWN_ROOT`: if set `chown` will be run against `/srv` setting the FTP user and group as owner and group of the directory. _Note: chown is run non-recursively ie. will only chown the root`_
 
+- `FTP_PASV_ADDRESS`: override the IP address that vsftpd will advertise in
+  response to the PASV command
+
 ## Usage Example
 
 ```

entry.sh

@@ -27,6 +27,13 @@ if [[ ! -z "${FTP_USERS_ROOT}" ]]; then
   sed -i 's/local_root=.*/local_root=\/srv\/$USER/' /etc/vsftpd*.conf
 fi
 
+# Support setting the passive address
+if [[ ! -z "$FTP_PASV_ADDRESS" ]]; then
+  for f in /etc/vsftpd*.conf; do
+    echo "pasv_address=${FTP_PASV_ADDRESS}" >> "$f"
+  done
+fi
+
 # Manage /srv permissions
 if [[ ! -z "${FTP_CHOWN_ROOT}" ]]; then
   chown ftp:ftp /srv