diff --git a/interface-definitions/https.xml b/interface-definitions/https.xml
index f5d609f95..d9874a1f9 100644
--- a/interface-definitions/https.xml
+++ b/interface-definitions/https.xml
@@ -1,135 +1,135 @@
 <?xml version="1.0"?>
 <!-- HTTPS configuration -->
 <interfaceDefinition>
   <node name="service">
     <children>
       <node name="https" owner="${vyos_conf_scripts_dir}/https.py">
         <properties>
           <help>HTTPS configuration</help>
           <priority>1001</priority>
         </properties>
         <children>
           <tagNode name="listen-address">
             <properties>
               <help>Addresses to listen for HTTPS requests</help>
               <valueHelp>
                 <format>ipv4</format>
                 <description>HTTPS IPv4 address</description>
               </valueHelp>
               <valueHelp>
                 <format>ipv6</format>
                 <description>HTTPS IPv6 address</description>
               </valueHelp>
               <valueHelp>
                 <format>'*'</format>
                 <description>any</description>
               </valueHelp>
               <constraint>
                 <validator name="ipv4-address"/>
                 <validator name="ipv6-address"/>
-                <regex>^\\*$</regex>
+                <regex>^\*$</regex>
               </constraint>
             </properties>
             <children>
               <leafNode name='listen-port'>
                 <properties>
                   <help>Port to listen for HTTPS requests; default 443</help>
                   <valueHelp>
                     <format>1-65535</format>
                     <description>Numeric IP port</description>
                   </valueHelp>
                   <constraint>
                     <validator name="numeric" argument="--range 1-65535"/>
                   </constraint>
                 </properties>
               </leafNode>
               <leafNode name="server-name">
                 <properties>
                   <help>Server names: exact, wildcard, regex, or '_' (any)</help>
                   <multi/>
                 </properties>
               </leafNode>
             </children>
           </tagNode>
           <node name="certificates">
             <properties>
               <help>TLS certificates</help>
             </properties>
             <children>
               <node name="system-generated-certificate" owner="${vyos_conf_scripts_dir}/vyos_cert.py">
                 <properties>
                   <help>Use an automatically generated self-signed certificate</help>
                   <valueless/>
                 </properties>
                 <children>
                   <leafNode name="lifetime">
                     <properties>
                       <help>Lifetime in days; default is 365</help>
                       <valueHelp>
                         <format>1-65535</format>
                         <description>Number of days</description>
                       </valueHelp>
                     </properties>
                   </leafNode>
                 </children>
               </node>
             </children>
           </node>
           <node name="api" owner="${vyos_conf_scripts_dir}/http-api.py">
             <properties>
               <help>VyOS HTTP API configuration</help>
               <priority>1002</priority>
             </properties>
             <children>
               <leafNode name="port">
                 <properties>
                   <help>Port for HTTP API service</help>
                   <valueHelp>
                     <format>1-65535</format>
                     <description>Numeric IP port</description>
                   </valueHelp>
                   <constraint>
                     <validator name="numeric" argument="--range 1-65535"/>
                   </constraint>
                 </properties>
               </leafNode>
               <node name="keys">
                 <properties>
                   <help>HTTP API keys</help>
                 </properties>
                 <children>
                   <tagNode name="id">
                     <properties>
                       <help>HTTP API id</help>
                     </properties>
                     <children>
                       <leafNode name="key">
                         <properties>
                           <help>HTTP API plaintext key</help>
                         </properties>
                       </leafNode>
                     </children>
                   </tagNode>
                 </children>
               </node>
               <leafNode name="strict">
                 <properties>
                   <help>Enforce strict path checking</help>
                   <valueless/>
                 </properties>
               </leafNode>
               <leafNode name="debug">
                 <properties>
                   <help>Debug</help>
                   <valueless/>
                   <hidden/>
                 </properties>
               </leafNode>
             </children>
           </node>
         </children>
       </node>
     </children>
   </node>
 </interfaceDefinition>
 
diff --git a/interface-definitions/snmp.xml b/interface-definitions/snmp.xml
index c52669e24..9aaaf29b4 100644
--- a/interface-definitions/snmp.xml
+++ b/interface-definitions/snmp.xml
@@ -1,584 +1,584 @@
 <?xml version="1.0"?>
 <!-- SNMP forwarder configuration -->
 <interfaceDefinition>
   <node name="service">
     <children>
       <node name="snmp" owner="${vyos_conf_scripts_dir}/snmp.py">
         <properties>
           <help>Simple Network Management Protocol (SNMP)</help>
           <priority>980</priority>
         </properties>
         <children>
           <tagNode name="community">
             <properties>
               <help>Community name [REQUIRED]</help>
               <constraint>
                 <regex>^[a-zA-Z0-9\-_]{1,100}</regex>
               </constraint>
               <constraintErrorMessage>Community string is limited to alphanumerical characters only with a total lenght of 100</constraintErrorMessage>
             </properties>
             <children>
               <leafNode name="authorization">
                 <properties>
                   <help>Authorization type (default: 'ro')</help>
                   <completionHelp>
                     <list>ro rw</list>
                   </completionHelp>
                   <valueHelp>
                     <format>ro</format>
                     <description>read only</description>
                   </valueHelp>
                   <valueHelp>
                     <format>rw</format>
                     <description>read write</description>
                   </valueHelp>
                   <constraint>
                     <regex>(ro|rw)</regex>
                   </constraint>
                   <constraintErrorMessage>Authorization type must be either 'rw' or 'ro'</constraintErrorMessage>
                 </properties>
               </leafNode>
               <leafNode name="client">
                 <properties>
                   <help>IP address of SNMP client allowed to contact system</help>
                   <constraint>
                     <validator name="ipv4-address"/>
                     <validator name="ipv6-address"/>
                   </constraint>
                   <multi/>
                 </properties>
               </leafNode>
               <leafNode name="network">
                 <properties>
                   <help>Subnet of SNMP client(s) allowed to contact system</help>
                   <valueHelp>
                     <format>ipv4net</format>
                     <description>IP address and prefix length</description>
                   </valueHelp>
                   <valueHelp>
                     <format>ipv6net</format>
                     <description>IPv6 address and prefix length</description>
                   </valueHelp>
                   <constraint>
                     <validator name="ip-prefix"/>
                   </constraint>
                   <multi/>
                 </properties>
               </leafNode>
             </children>
           </tagNode>
           <leafNode name="contact">
             <properties>
               <help>Contact information</help>
               <constraint>
                 <regex>.{1,255}</regex>
               </constraint>
               <constraintErrorMessage>Contact information is limited to 255 characters or less</constraintErrorMessage>
             </properties>
           </leafNode>
           <leafNode name="description">
             <properties>
               <help>Description information</help>
               <constraint>
                 <regex>.{1,255}</regex>
               </constraint>
               <constraintErrorMessage>Description is limited to 255 characters or less</constraintErrorMessage>
             </properties>
           </leafNode>
           <tagNode name="listen-address">
             <properties>
               <help>IP address to listen for incoming SNMP requests</help>
               <valueHelp>
                 <format>ipv4</format>
                 <description>IPv4 address to listen for incoming SNMP requests</description>
               </valueHelp>
               <valueHelp>
                 <format>ipv6</format>
                 <description>IPv6 address to listen for incoming SNMP requests</description>
               </valueHelp>
               <constraint>
                 <validator name="ipv4-address"/>
                 <validator name="ipv6-address"/>
               </constraint>
             </properties>
             <children>
               <leafNode name="port">
                 <properties>
                   <help>Port for SNMP service (default: '161')</help>
                   <valueHelp>
                     <format>1-65535</format>
                     <description>Numeric IP port</description>
                   </valueHelp>
                   <constraint>
                     <validator name="numeric" argument="--range 1-65535"/>
                   </constraint>
                   <constraintErrorMessage>Port number must be in range 1 to 65535</constraintErrorMessage>
                 </properties>
               </leafNode>
             </children>
           </tagNode>
           <leafNode name="location">
             <properties>
               <help>Location information</help>
               <constraint>
                 <regex>.{1,255}</regex>
               </constraint>
               <constraintErrorMessage>Location is limited to 255 characters or less</constraintErrorMessage>
             </properties>
           </leafNode>
           <leafNode name="smux-peer">
             <properties>
               <help>Register a subtree for SMUX-based processing</help>
               <valueHelp>
                 <format>oid</format>
                 <description>Object Identifier</description>
               </valueHelp>
               <multi/>
             </properties>
           </leafNode>
           <leafNode name="trap-source">
             <properties>
               <help>SNMP trap source address</help>
               <constraint>
                 <validator name="ipv4-address"/>
                 <validator name="ipv6-address"/>
               </constraint>
             </properties>
           </leafNode>
           <tagNode name="trap-target">
             <properties>
               <help>Address of trap target</help>
               <constraint>
                 <validator name="ipv4-address"/>
                 <validator name="ipv6-address"/>
               </constraint>
             </properties>
             <children>
               <leafNode name="community">
                 <properties>
                   <help>Community used when sending trap information</help>
                 </properties>
               </leafNode>
               <leafNode name="port">
                 <properties>
                   <help>Destination port used for trap notification</help>
                   <valueHelp>
                     <format>1-65535</format>
                     <description>Numeric IP port</description>
                   </valueHelp>
                   <constraint>
                     <validator name="numeric" argument="--range 1-65535"/>
                   </constraint>
                   <constraintErrorMessage>Port number must be in range 1 to 65535</constraintErrorMessage>
                 </properties>
               </leafNode>
             </children>
           </tagNode>
           <node name="v3">
             <properties>
               <help>Simple Network Management Protocol (SNMP) v3</help>
             </properties>
             <children>
               <leafNode name="engineid">
                 <properties>
                   <help>Specifies the EngineID that uniquely identify an agent (e.g. 0xff42)</help>
                   <constraint>
                     <regex>^(0x){0,1}([0-9a-f][0-9a-f]){1,18}$</regex>
                   </constraint>
                   <constraintErrorMessage>ID must contain an even number (from 2 to 36) of hex digits</constraintErrorMessage>
                 </properties>
               </leafNode>
               <tagNode name="group">
                 <properties>
                   <help>Specifies the group with name groupname</help>
                 </properties>
                 <children>
                   <leafNode name="mode">
                     <properties>
                       <help>Define group access permission (default: 'ro')</help>
                       <completionHelp>
                         <list>ro rw</list>
                       </completionHelp>
                       <valueHelp>
                         <format>ro</format>
                         <description>read only</description>
                       </valueHelp>
                       <valueHelp>
                         <format>rw</format>
                         <description>read write</description>
                       </valueHelp>
                       <constraint>
                         <regex>(ro|rw)</regex>
                       </constraint>
                       <constraintErrorMessage>Authorization type must be either 'rw' or 'ro'</constraintErrorMessage>
                     </properties>
                   </leafNode>
                   <leafNode name="seclevel">
                     <properties>
                       <help>Security levels</help>
                       <completionHelp>
                         <list>noauth auth priv2</list>
                       </completionHelp>
                       <valueHelp>
                         <format>noauth</format>
                         <description>Messages not authenticated and not encrypted (noAuthNoPriv)</description>
                       </valueHelp>
                       <valueHelp>
                         <format>auth</format>
                         <description>Messages are authenticated but not encrypted (authNoPriv)</description>
                       </valueHelp>
                       <valueHelp>
                         <format>priv</format>
                         <description>Messages are authenticated and encrypted (authPriv)</description>
                       </valueHelp>
                       <constraint>
                         <regex>(noauth|auth|priv)</regex>
                       </constraint>
                     </properties>
                   </leafNode>
                   <leafNode name="view">
                     <properties>
                       <help>Defines the name of view</help>
                       <completionHelp>
                         <path>service snmp v3 view</path>
                       </completionHelp>
                     </properties>
                   </leafNode>
                 </children>
               </tagNode>
               <tagNode name="trap-target">
                 <properties>
                   <help>Defines SNMP target for inform or traps for IP</help>
                   <valueHelp>
                     <format>ipv4</format>
                     <description>IP address of trap target</description>
                   </valueHelp>
                   <valueHelp>
                     <format>ipv6</format>
                     <description>IPv6 address of trap target</description>
                   </valueHelp>
                   <constraint>
                     <validator name="ipv4-address"/>
                     <validator name="ipv6-address"/>
                   </constraint>
                 </properties>
                 <children>
                   <node name="auth">
                     <properties>
                       <help>Defines the privacy</help>
                     </properties>
                     <children>
                       <leafNode name="encrypted-key">
                         <properties>
                           <help>Defines the encrypted key for authentication</help>
                           <constraint>
                             <regex>^0x[0-9a-f]*$</regex>
                           </constraint>
                           <constraintErrorMessage>Key must start from '0x' and contain hex digits</constraintErrorMessage>
                         </properties>
                       </leafNode>
                       <leafNode name="plaintext-key">
                         <properties>
                           <help>Defines the clear text key for authentication</help>
                           <constraint>
                             <regex>^.{8,}$</regex>
                           </constraint>
                           <constraintErrorMessage>Key must contain 8 or more characters</constraintErrorMessage>
                         </properties>
                       </leafNode>
                       <leafNode name="type">
                         <properties>
                           <help>Defines the protocol used for authentication (default: 'md5')</help>
                           <completionHelp>
                             <list>md5 sha</list>
                           </completionHelp>
                           <valueHelp>
                             <format>md5</format>
                             <description>Message Digest 5</description>
                           </valueHelp>
                           <valueHelp>
                             <format>sha</format>
                             <description>Secure Hash Algorithm</description>
                           </valueHelp>
                           <constraint>
                             <regex>(md5|sha)</regex>
                           </constraint>
                         </properties>
                       </leafNode>
                     </children>
                   </node>
                   <leafNode name="port">
                     <properties>
                       <help>Specifies TCP/UDP port of destination SNMP traps/informs (default: '162')</help>
                       <valueHelp>
                         <format>1-65535</format>
                         <description>Numeric IP port</description>
                       </valueHelp>
                       <constraint>
                         <validator name="numeric" argument="--range 1-65535"/>
                       </constraint>
                       <constraintErrorMessage>Port number must be in range 1 to 65535</constraintErrorMessage>
                     </properties>
                   </leafNode>
                   <node name="privacy">
                     <properties>
                       <help>Defines the privacy</help>
                     </properties>
                     <children>
                       <leafNode name="encrypted-key">
                         <properties>
                           <help>Defines the encrypted key for privacy protocol</help>
                           <constraint>
                             <regex>^0x[0-9a-f]*$</regex>
                           </constraint>
                           <constraintErrorMessage>Key must start from '0x' and contain hex digits</constraintErrorMessage>
                         </properties>
                       </leafNode>
                       <leafNode name="plaintext-key">
                         <properties>
                           <help>Defines the clear text key for privacy protocol</help>
                           <constraint>
                             <regex>^.{8,}$</regex>
                           </constraint>
                           <constraintErrorMessage>Key must contain 8 or more characters</constraintErrorMessage>
                         </properties>
                       </leafNode>
                       <leafNode name="type">
                         <properties>
                           <help>Defines the protocol for privacy (default: 'des')</help>
                           <completionHelp>
                             <list>des aes</list>
                           </completionHelp>
                           <valueHelp>
                             <format>des</format>
                             <description>Data Encryption Standard</description>
                           </valueHelp>
                           <valueHelp>
                             <format>aes</format>
                             <description>Advanced Encryption Standard</description>
                           </valueHelp>
                           <constraint>
                             <regex>(des|aes)</regex>
                           </constraint>
                         </properties>
                       </leafNode>
                     </children>
                   </node>
                   <leafNode name="protocol">
                     <properties>
                       <help>Defines protocol for notification between TCP and UDP</help>
                       <completionHelp>
                         <list>tcp udp</list>
                       </completionHelp>
                       <valueHelp>
                         <format>tcp</format>
                         <description>Use Transmission Control Protocol for notifications</description>
                       </valueHelp>
                       <valueHelp>
                         <format>udp</format>
                         <description>Use User Datagram Protocol for notifications</description>
                       </valueHelp>
                       <constraint>
                         <regex>(tcp|udp)</regex>
                       </constraint>
                     </properties>
                   </leafNode>
                   <leafNode name="type">
                     <properties>
                       <help>Specifies the type of notification between inform and trap (default: 'inform')</help>
                       <completionHelp>
                         <list>inform trap</list>
                       </completionHelp>
                       <valueHelp>
                         <format>inform</format>
                         <description>Use INFORM</description>
                       </valueHelp>
                       <valueHelp>
                         <format>trap</format>
                         <description>Use TRAP</description>
                       </valueHelp>
                       <constraint>
                         <regex>(inform|trap)</regex>
                       </constraint>
                     </properties>
                   </leafNode>
                   <leafNode name="user">
                     <properties>
                       <help>Defines username for authentication</help>
                       <completionHelp>
                         <path>service snmp v3 user</path>
                       </completionHelp>
                     </properties>
                   </leafNode>
                 </children>
               </tagNode>
               <tagNode name="user">
                 <properties>
                   <help>Specifies the user with name username</help>
                   <constraint>
                     <regex>^[^\(\)\|\-]+$</regex>
                   </constraint>
                   <constraintErrorMessage>Illegal characters in name</constraintErrorMessage>
                 </properties>
                 <children>
                   <node name="auth">
                     <properties>
                       <help>Specifies the auth</help>
                     </properties>
                     <children>
                       <leafNode name="encrypted-key">
                         <properties>
                           <help>Defines the encrypted key for authentication</help>
                           <constraint>
                             <regex>^0x[0-9a-f]*$</regex>
                           </constraint>
                           <constraintErrorMessage>Key must start from '0x' and contain hex digits</constraintErrorMessage>
                         </properties>
                       </leafNode>
                       <leafNode name="plaintext-key">
                         <properties>
                           <help>Defines the clear text key for authentication</help>
                           <constraint>
                             <regex>^.{8,}$</regex>
                           </constraint>
                           <constraintErrorMessage>Key must contain 8 or more characters</constraintErrorMessage>
                         </properties>
                       </leafNode>
                       <leafNode name="type">
                         <properties>
                           <help>Defines the protocol used for authentication (default: 'md5')</help>
                           <completionHelp>
                             <list>md5 sha</list>
                           </completionHelp>
                           <valueHelp>
                             <format>md5</format>
                             <description>Message Digest 5</description>
                           </valueHelp>
                           <valueHelp>
                             <format>sha</format>
                             <description>Secure Hash Algorithm</description>
                           </valueHelp>
                           <constraint>
                             <regex>(md5|sha)</regex>
                           </constraint>
                         </properties>
                       </leafNode>
                     </children>
                   </node>
                   <leafNode name="group">
                     <properties>
                       <help>Specifies group for user name</help>
                       <completionHelp>
                         <path>service snmp v3 group</path>
                       </completionHelp>
                     </properties>
                   </leafNode>
                   <leafNode name="mode">
                     <properties>
                       <help>Define users access permission (default: 'ro')</help>
                       <completionHelp>
                         <list>ro rw</list>
                       </completionHelp>
                       <valueHelp>
                         <format>ro</format>
                         <description>read only</description>
                       </valueHelp>
                       <valueHelp>
                         <format>rw</format>
                         <description>read write</description>
                       </valueHelp>
                       <constraint>
                         <regex>(ro|rw)</regex>
                       </constraint>
                       <constraintErrorMessage>Authorization type must be either 'rw' or 'ro'</constraintErrorMessage>
                     </properties>
                   </leafNode>
                   <node name="privacy">
                     <properties>
                       <help>Defines the privacy</help>
                     </properties>
                     <children>
                       <leafNode name="encrypted-key">
                         <properties>
                           <help>Defines the encrypted key for privacy protocol</help>
                           <constraint>
                             <regex>^0x[0-9a-f]*$</regex>
                           </constraint>
                           <constraintErrorMessage>Key must start from '0x' and contain hex digits</constraintErrorMessage>
                         </properties>
                       </leafNode>
                       <leafNode name="plaintext-key">
                         <properties>
                           <help>Defines the clear text key for privacy protocol</help>
                           <constraint>
                             <regex>^.{8,}$</regex>
                           </constraint>
                           <constraintErrorMessage>Key must contain 8 or more characters</constraintErrorMessage>
                         </properties>
                       </leafNode>
                       <leafNode name="type">
                         <properties>
                           <help>Defines the protocol for privacy (default: 'des')</help>
                           <completionHelp>
                             <list>des aes</list>
                           </completionHelp>
                           <valueHelp>
                             <format>des</format>
                             <description>Data Encryption Standard</description>
                           </valueHelp>
                           <valueHelp>
                             <format>aes</format>
                             <description>Advanced Encryption Standard</description>
                           </valueHelp>
                           <constraint>
                             <regex>(des|aes)</regex>
                           </constraint>
                         </properties>
                       </leafNode>
                     </children>
                   </node>
                 </children>
               </tagNode>
               <tagNode name="view">
                 <properties>
                   <help>Specifies the view with name viewname</help>
                   <constraint>
                     <regex>^[^\(\)\|\-]+$</regex>
                   </constraint>
                   <constraintErrorMessage>Illegal characters in name</constraintErrorMessage>
                 </properties>
                 <children>
                   <tagNode name="oid">
                     <properties>
                       <help>Specifies the oid</help>
                       <constraint>
-                        <regex>^[0-9]+(\\.[0-9]+)*$</regex>
+                        <regex>^[0-9]+(\.[0-9]+)*$</regex>
                       </constraint>
                       <constraintErrorMessage>OID must start from a number</constraintErrorMessage>
                     </properties>
                     <children>
                       <leafNode name="exclude">
                         <properties>
                           <help>Exclude is an optional argument</help>
                         </properties>
                       </leafNode>
                       <leafNode name="mask">
                         <properties>
                           <help>Defines a bit-mask that is indicating which subidentifiers of the associated subtree OID should be regarded as significant</help>
                           <constraint>
-                            <regex>^[0-9a-f]{2}([\\.:][0-9a-f]{2})*$</regex>
+                            <regex>^[0-9a-f]{2}([\.:][0-9a-f]{2})*$</regex>
                           </constraint>
                           <constraintErrorMessage>MASK is a list of hex octets, separated by '.' or ':'</constraintErrorMessage>
                         </properties>
                       </leafNode>
                     </children>
                   </tagNode>
                 </children>
               </tagNode>
             </children>
           </node>
         </children>
       </node>
     </children>
   </node>
 </interfaceDefinition>