diff --git a/extras/ikev2setup.sh b/extras/ikev2setup.sh
index 9be5596..c6190ea 100755
--- a/extras/ikev2setup.sh
+++ b/extras/ikev2setup.sh
@@ -701,7 +701,7 @@ create_client_cert() {
 export_p12_file() {
   bigecho2 "Creating client configuration..."
 
-  p12_password=$(LC_CTYPE=C tr -dc 'A-HJ-NPR-Za-km-z2-9' < /dev/urandom | head -c 18)
+  p12_password=$(LC_CTYPE=C tr -dc 'A-HJ-NPR-Za-km-z2-9' </dev/urandom 2>/dev/null | head -c 18)
   [ -z "$p12_password" ] && exiterr "Could not generate a random password for .p12 file."
 
   p12_file="$export_dir$client_name.p12"
diff --git a/vpnsetup.sh b/vpnsetup.sh
index e79200e..a21f559 100755
--- a/vpnsetup.sh
+++ b/vpnsetup.sh
@@ -111,9 +111,9 @@ fi
 
 if [ -z "$VPN_IPSEC_PSK" ] && [ -z "$VPN_USER" ] && [ -z "$VPN_PASSWORD" ]; then
   bigecho "VPN credentials not set by user. Generating random PSK and password..."
-  VPN_IPSEC_PSK=$(LC_CTYPE=C tr -dc 'A-HJ-NPR-Za-km-z2-9' < /dev/urandom | head -c 20)
+  VPN_IPSEC_PSK=$(LC_CTYPE=C tr -dc 'A-HJ-NPR-Za-km-z2-9' </dev/urandom 2>/dev/null | head -c 20)
   VPN_USER=vpnuser
-  VPN_PASSWORD=$(LC_CTYPE=C tr -dc 'A-HJ-NPR-Za-km-z2-9' < /dev/urandom | head -c 16)
+  VPN_PASSWORD=$(LC_CTYPE=C tr -dc 'A-HJ-NPR-Za-km-z2-9' </dev/urandom 2>/dev/null | head -c 16)
 fi
 
 if [ -z "$VPN_IPSEC_PSK" ] || [ -z "$VPN_USER" ] || [ -z "$VPN_PASSWORD" ]; then
diff --git a/vpnsetup_amzn.sh b/vpnsetup_amzn.sh
index 7988894..788a43c 100755
--- a/vpnsetup_amzn.sh
+++ b/vpnsetup_amzn.sh
@@ -84,9 +84,9 @@ fi
 
 if [ -z "$VPN_IPSEC_PSK" ] && [ -z "$VPN_USER" ] && [ -z "$VPN_PASSWORD" ]; then
   bigecho "VPN credentials not set by user. Generating random PSK and password..."
-  VPN_IPSEC_PSK=$(LC_CTYPE=C tr -dc 'A-HJ-NPR-Za-km-z2-9' < /dev/urandom | head -c 20)
+  VPN_IPSEC_PSK=$(LC_CTYPE=C tr -dc 'A-HJ-NPR-Za-km-z2-9' </dev/urandom 2>/dev/null | head -c 20)
   VPN_USER=vpnuser
-  VPN_PASSWORD=$(LC_CTYPE=C tr -dc 'A-HJ-NPR-Za-km-z2-9' < /dev/urandom | head -c 16)
+  VPN_PASSWORD=$(LC_CTYPE=C tr -dc 'A-HJ-NPR-Za-km-z2-9' </dev/urandom 2>/dev/null | head -c 16)
 fi
 
 if [ -z "$VPN_IPSEC_PSK" ] || [ -z "$VPN_USER" ] || [ -z "$VPN_PASSWORD" ]; then
diff --git a/vpnsetup_centos.sh b/vpnsetup_centos.sh
index 43482a6..9109b9e 100755
--- a/vpnsetup_centos.sh
+++ b/vpnsetup_centos.sh
@@ -100,9 +100,9 @@ fi
 
 if [ -z "$VPN_IPSEC_PSK" ] && [ -z "$VPN_USER" ] && [ -z "$VPN_PASSWORD" ]; then
   bigecho "VPN credentials not set by user. Generating random PSK and password..."
-  VPN_IPSEC_PSK=$(LC_CTYPE=C tr -dc 'A-HJ-NPR-Za-km-z2-9' < /dev/urandom | head -c 20)
+  VPN_IPSEC_PSK=$(LC_CTYPE=C tr -dc 'A-HJ-NPR-Za-km-z2-9' </dev/urandom 2>/dev/null | head -c 20)
   VPN_USER=vpnuser
-  VPN_PASSWORD=$(LC_CTYPE=C tr -dc 'A-HJ-NPR-Za-km-z2-9' < /dev/urandom | head -c 16)
+  VPN_PASSWORD=$(LC_CTYPE=C tr -dc 'A-HJ-NPR-Za-km-z2-9' </dev/urandom 2>/dev/null | head -c 16)
 fi
 
 if [ -z "$VPN_IPSEC_PSK" ] || [ -z "$VPN_USER" ] || [ -z "$VPN_PASSWORD" ]; then