diff --git a/firewall b/firewall
index e63e461..f8ffb97 100755
--- a/firewall
+++ b/firewall
@@ -165,8 +165,10 @@ fw_start() {
   #### tftp allowed
   #$IPT -A INPUT -j ACCEPT -p udp -i "${ILAN}" -d "${IPLAN}" --dport 69 -m state --state NEW -m comment --comment "TFTPD in"
 
-  #### Printers
-  $IPT -A INPUT -j ACCEPT -p udp -i "${ILAN}" -d "${IPLAN}" --sport 161 -m state --state NEW -m comment --comment "SNMP IN"
+  if [ $(command -v cupsd) ]; then
+    #### Printers
+    $IPT -A INPUT -j ACCEPT -p udp -i "${ILAN}" -d "${IPLAN}" --sport 161 -m state --state NEW -m comment --comment "SNMP IN"
+  fi
 
   #########################
   ##  {Multi,Broad}cast  ##
@@ -255,9 +257,10 @@ fw_start() {
     $IPT -A OUTPUT -j ACCEPT -p udp -o "${ILAN}" -s "${IPLAN}" --dport 32767 -m state --state NEW -m comment --comment "NFS mountd out"
   fi
 
-#  #### Printers
-#  $IPT -A OUTPUT -j ACCEPT -p udp -o "${ILAN}" -s "${IPLAN}" --dport 161 -m state --state NEW -m comment --comment "SNMP OUT"
-#
+  if [ $(command -v cupsd) ]; then
+    #### Printers
+    $IPT -A OUTPUT -j ACCEPT -p udp -o "${ILAN}" -s "${IPLAN}" --dport 161 -m state --state NEW -m comment --comment "SNMP OUT"
+  fi
 
 }