diff --git a/extras/quickstart.sh b/extras/quickstart.sh
index 4805ae6..bb3e0e5 100755
--- a/extras/quickstart.sh
+++ b/extras/quickstart.sh
@@ -84,6 +84,9 @@ check_os() {
     grep -qi stream "$rh_file" && os_ver=8s
     grep -qi rocky "$rh_file" && os_type=rocky
     grep -qi alma "$rh_file" && os_type=alma
+    if [ "$os_type" = "centos" ] && [ "$os_ver" = "8" ]; then
+      exiterr "CentOS Linux 8 is EOL and not supported."
+    fi
   elif grep -qs "Amazon Linux release 2" /etc/system-release; then
     os_type=amzn
     os_ver=2
diff --git a/extras/vpnupgrade.sh b/extras/vpnupgrade.sh
index 7c09588..2b731ab 100755
--- a/extras/vpnupgrade.sh
+++ b/extras/vpnupgrade.sh
@@ -49,6 +49,9 @@ check_os() {
     grep -qi stream "$rh_file" && os_ver=8s
     grep -qi rocky "$rh_file" && os_type=rocky
     grep -qi alma "$rh_file" && os_type=alma
+    if [ "$os_type" = "centos" ] && [ "$os_ver" = "8" ]; then
+      exiterr "CentOS Linux 8 is EOL and not supported."
+    fi
   elif grep -qs "Amazon Linux release 2" /etc/system-release; then
     os_type=amzn
     os_ver=2
diff --git a/extras/vpnupgrade_centos.sh b/extras/vpnupgrade_centos.sh
index 02e354f..dd691e9 100755
--- a/extras/vpnupgrade_centos.sh
+++ b/extras/vpnupgrade_centos.sh
@@ -52,6 +52,9 @@ check_os() {
     grep -qi stream "$rh_file" && os_ver=8s
     grep -qi rocky "$rh_file" && os_type=rocky
     grep -qi alma "$rh_file" && os_type=alma
+    if [ "$os_type" = "centos" ] && [ "$os_ver" = "8" ]; then
+      exiterr "CentOS Linux 8 is EOL and not supported."
+    fi
   else
     exiterr "This script only supports CentOS/RHEL 7/8, Rocky Linux and AlmaLinux."
   fi
diff --git a/vpnsetup.sh b/vpnsetup.sh
index 7a296aa..1b57d0b 100755
--- a/vpnsetup.sh
+++ b/vpnsetup.sh
@@ -84,6 +84,9 @@ check_os() {
     grep -qi stream "$rh_file" && os_ver=8s
     grep -qi rocky "$rh_file" && os_type=rocky
     grep -qi alma "$rh_file" && os_type=alma
+    if [ "$os_type" = "centos" ] && [ "$os_ver" = "8" ]; then
+      exiterr "CentOS Linux 8 is EOL and not supported."
+    fi
   elif grep -qs "Amazon Linux release 2" /etc/system-release; then
     os_type=amzn
     os_ver=2
diff --git a/vpnsetup_centos.sh b/vpnsetup_centos.sh
index e27838d..640b7ec 100755
--- a/vpnsetup_centos.sh
+++ b/vpnsetup_centos.sh
@@ -78,6 +78,9 @@ check_os() {
     grep -qi stream "$rh_file" && os_ver=8s
     grep -qi rocky "$rh_file" && os_type=rocky
     grep -qi alma "$rh_file" && os_type=alma
+    if [ "$os_type" = "centos" ] && [ "$os_ver" = "8" ]; then
+      exiterr "CentOS Linux 8 is EOL and not supported."
+    fi
   else
     exiterr "This script only supports CentOS/RHEL 7/8, Rocky Linux and AlmaLinux."
   fi