diff --git a/Dockerfile b/Dockerfile
index 64accf5..e51faeb 100755
--- a/Dockerfile
+++ b/Dockerfile
@@ -107,6 +107,7 @@ RUN \
 	certbot-dns-inwx \
 	certbot-dns-linode \
 	certbot-dns-luadns \
+	certbot-dns-netcup \
 	certbot-dns-nsone \
 	certbot-dns-ovh \
 	certbot-dns-rfc2136 \
diff --git a/Dockerfile.aarch64 b/Dockerfile.aarch64
index bf47a0e..a32fee6 100755
--- a/Dockerfile.aarch64
+++ b/Dockerfile.aarch64
@@ -107,6 +107,7 @@ RUN \
 	certbot-dns-inwx \
 	certbot-dns-linode \
 	certbot-dns-luadns \
+	certbot-dns-netcup \
 	certbot-dns-nsone \
 	certbot-dns-ovh \
 	certbot-dns-rfc2136 \
diff --git a/Dockerfile.armhf b/Dockerfile.armhf
index cc2bec8..9fbc5e1 100755
--- a/Dockerfile.armhf
+++ b/Dockerfile.armhf
@@ -107,6 +107,7 @@ RUN \
 	certbot-dns-inwx \
 	certbot-dns-linode \
 	certbot-dns-luadns \
+	certbot-dns-netcup \
 	certbot-dns-nsone \
 	certbot-dns-ovh \
 	certbot-dns-rfc2136 \
diff --git a/readme-vars.yml b/readme-vars.yml
index 702c926..2360a31 100755
--- a/readme-vars.yml
+++ b/readme-vars.yml
@@ -50,7 +50,7 @@ cap_add_param_vars:
 # optional container parameters
 opt_param_usage_include_env: true
 opt_param_env_vars:
-  - { env_var: "DNSPLUGIN", env_value: "cloudflare", desc: "Required if `VALIDATION` is set to `dns`. Options are `aliyun`, `cloudflare`, `cloudxns`, `cpanel`, `digitalocean`, `dnsimple`, `dnsmadeeasy`, `domeneshop`, `gandi`, `google`, `inwx`, `linode`, `luadns`, `nsone`, `ovh`, `rfc2136`, `route53` and `transip`. Also need to enter the credentials into the corresponding ini (or json for some plugins) file under `/config/dns-conf`." }
+  - { env_var: "DNSPLUGIN", env_value: "cloudflare", desc: "Required if `VALIDATION` is set to `dns`. Options are `aliyun`, `cloudflare`, `cloudxns`, `cpanel`, `digitalocean`, `dnsimple`, `dnsmadeeasy`, `domeneshop`, `gandi`, `google`, `inwx`, `linode`, `luadns`, `netcup`, `nsone`, `ovh`, `rfc2136`, `route53` and `transip`. Also need to enter the credentials into the corresponding ini (or json for some plugins) file under `/config/dns-conf`." }
   - { env_var: "PROPAGATION", env_value: "", desc: "Optionally override (in seconds) the default propagation time for the dns plugins." }
   - { env_var: "DUCKDNSTOKEN", env_value: "", desc: "Required if `VALIDATION` is set to `duckdns`. Retrieve your token from https://www.duckdns.org" }
   - { env_var: "EMAIL", env_value: "", desc: "Optional e-mail address used for cert expiration notifications." }
@@ -149,6 +149,7 @@ app_setup_nginx_reverse_proxy_block: ""
 
 # changelog
 changelogs:
+  - { date: "01.11.20:", desc: "Add support for netcup dns validation" }
   - { date: "29.10.20:", desc: "[Existing users should update:](https://github.com/linuxserver/docker-swag/blob/master/README.md#updating-configs) ssl.conf - Add frame-ancestors to Content-Security-Policy." }
   - { date: "04.10.20:", desc: "[Existing users should update:](https://github.com/linuxserver/docker-swag/blob/master/README.md#updating-configs) nginx.conf, proxy.conf, and ssl.conf - Minor cleanups and reordering." }
   - { date: "20.09.20:", desc: "[Existing users should update:](https://github.com/linuxserver/docker-swag/blob/master/README.md#updating-configs) nginx.conf - Added geoip2 configs. Added MAXMINDDB_LICENSE_KEY variable to readme."}
diff --git a/root/defaults/dns-conf/netcup.ini b/root/defaults/dns-conf/netcup.ini
new file mode 100644
index 0000000..a3a1e90
--- /dev/null
+++ b/root/defaults/dns-conf/netcup.ini
@@ -0,0 +1,3 @@
+dns_netcup_customer_id  = 123456
+dns_netcup_api_key      = 0123456789abcdef0123456789abcdef01234567
+dns_netcup_api_password = abcdef0123456789abcdef01234567abcdef0123
diff --git a/root/etc/cont-init.d/50-config b/root/etc/cont-init.d/50-config
index bc63fcb..f1d925f 100644
--- a/root/etc/cont-init.d/50-config
+++ b/root/etc/cont-init.d/50-config
@@ -92,7 +92,7 @@ if ! grep -q 'PARAMETERS' "/config/nginx/dhparams.pem"; then
 fi
 
 # check to make sure DNSPLUGIN is selected if dns validation is used
-[[ "$VALIDATION" = "dns" ]] && [[ ! "$DNSPLUGIN" =~ ^(aliyun|cloudflare|cloudxns|cpanel|digitalocean|dnsimple|dnsmadeeasy|domeneshop|gandi|google|inwx|linode|luadns|nsone|ovh|rfc2136|route53|transip)$ ]] && \
+[[ "$VALIDATION" = "dns" ]] && [[ ! "$DNSPLUGIN" =~ ^(aliyun|cloudflare|cloudxns|cpanel|digitalocean|dnsimple|dnsmadeeasy|domeneshop|gandi|google|inwx|linode|luadns|netcup|nsone|ovh|rfc2136|route53|transip)$ ]] && \
   echo "Please set the DNSPLUGIN variable to a valid plugin name. See docker info for more details." && \
   sleep infinity
 
@@ -189,6 +189,9 @@ if [ "$VALIDATION" = "dns" ]; then
   elif [[ "$DNSPLUGIN" =~ ^(aliyun|domeneshop|inwx|transip)$ ]]; then
     if [ -n "$PROPAGATION" ];then PROPAGATIONPARAM="--certbot-dns-${DNSPLUGIN}:dns-${DNSPLUGIN}-propagation-seconds ${PROPAGATION}"; fi
     PREFCHAL="-a certbot-dns-${DNSPLUGIN}:dns-${DNSPLUGIN} --certbot-dns-${DNSPLUGIN}:dns-${DNSPLUGIN}-credentials /config/dns-conf/${DNSPLUGIN}.ini ${PROPAGATIONPARAM} --manual-public-ip-logging-ok"
+  elif [[ "$DNSPLUGIN" =~ ^(netcup)$ ]]; then
+    if [ -n "$PROPAGATION" ];then PROPAGATIONPARAM="--dns-${DNSPLUGIN}-propagation-seconds ${PROPAGATION}"; fi
+    PREFCHAL="-a dns-${DNSPLUGIN} --dns-${DNSPLUGIN}-credentials /config/dns-conf/${DNSPLUGIN}.ini ${PROPAGATIONPARAM} --manual-public-ip-logging-ok"
   else
     if [ -n "$PROPAGATION" ];then PROPAGATIONPARAM="--dns-${DNSPLUGIN}-propagation-seconds ${PROPAGATION}"; fi
     PREFCHAL="--dns-${DNSPLUGIN} --dns-${DNSPLUGIN}-credentials /config/dns-conf/${DNSPLUGIN}.ini ${PROPAGATIONPARAM} --manual-public-ip-logging-ok"