DNS Forwarder, Enable DNS forwarding | Kerio Tech Firewall6 instruction

5.3 DNS Forwarder

Figure 5.9 DNS forwarder settings

Enable DNS forwarding

This option switches between the on/oﬀ modes of the DNS Forwarder (the service is running on the port 53 and UDP protocol is used by this service). If DNS Forwarder is not used for your network conﬁguration, it can be switched oﬀ. If you want to run another DNS server on the same host, DNS Forwarder must be switched oﬀ, or there will be a collision on the port.

DNS forwarding

DNS Forwarder must know at least one DNS server to forward queries to. This option deﬁnes how DNS Forwarder will identify the IP address of the server:

•Forward DNS queries to the server automatically... — functional Internet connec- tion is required. At least one DNS server must be deﬁned within TCP/IP conﬁg- uration (in Windows, DNS servers are deﬁned at a particular adapter, however, these settings will be used within the entire operating system).

DNS Forwarder can read these settings and use the same DNS servers. This provides the following beneﬁt — the hosts within the local network and the WinRoute host will use the same DNS server.

•Forward DNS queries to the speciﬁed DNS server(s) — DNS queries will be for- warded to the speciﬁed DNS server/servers (if more than one server speciﬁed,

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Kerio Tech Firewall6 manual DNS Forwarder, Enable DNS forwarding

Contents

Kerio Technologies Administrator’s GuidePage Contents 113 Remote Administration and Update Checks 209 Kerio Clientless SSL-VPN 355 393 Quick Checklist Page Introduction Basic FeaturesKerio WinRoute Firewall Kerio WinRoute Firewall Additional Features Transparent support for Active Directory Antivirus controlEmail alerts User quotas Clientless SSL-VPN Conﬂicting softwareCollision of low-level drivers Port collision Antivirus applications Installation InstallationSteps to be taken before the installation System requirements Installation and Basic Conﬁguration Guide Custom installation selecting optional components Protection of the installed product Conﬂicting Applications and System Services WinRoute Firewall Engine WinRoute ComponentsWinRoute Engine Monitor WinRoute Engine Monitor Kerio Administration ConsoleWinRoute Engine Monitor Upgrade and Uninstallation Uninstallation Upgrade and UninstallationTypically the path C\Program Files\Kerio\WinRoute Firewall Update Checker Upgrade from WinRoute ProSetting of administration username and password Conﬁguration Wizard Enable remote access Remote AccessRemote IP address Initial conﬁguration Allowing remote administration Administration Window WinRoute Administration Administration Window Main menu WinRoute AdministrationFile Help menu Status bar Administration WindowDetection of WinRoute Firewall Engine connection drop-out Column customization in Interfaces View Settings View Settings License types and number of users Product Registration and LicensingLicense types optional components Deciding on a number of users licenses License types and number of users Product License informationCopyright Homepage Subscription expiration date License IDProduct expiration date Number of users Registration of the trial version Registration of the product in the Administration Console Trial version registration security code Registration of the product in the Administration Console Trial version registration other information Trial version registration Trial ID Registration of the purchased product Product Registration and Licensing Registration of the product in the Administration Console 10 Product registration user information 12 Product registration summary Update of registration information Product registration at the website Subscription / Update Expiration Bubble alerts Subscription / Update Expiration 15 The notice that the subscription has already expired User counter Start WinRoute User counterLicense counter License release Network interfaces Settings for Interfaces and Network ServicesInterface IP Address and Mask Adapter info Dial or Hang Up /Enebale, DisableAdd Modify Special interfaces RefreshDial-In VPN server Interface type selection Bind this interface Use the following login data Use login data from the RAS entryInterface name RAS Entry Dial-up demand dial Connection Advanced Hangup if idle Edit Interface parameters Connection Failover Enable automatic connection failover Connection Failover SetupConnection Failover Current connection Conﬁguration of primary and secondary Internet connection Secondary connection Primary connectionDial-up Use DNS Forwarder conﬁguration DNS Forwarder DNS Forwarder Enable DNS forwardingDNS forwarding Enable DNS forwarding Enable cache for faster response of repeated queriesClear cache Use custom forwarding 10 Speciﬁc settings of DNS forwarding 11 DNS forwarding a new rule Simple DNS resolution Combine the name ... with DNS domain Before forwarding a query Dhcp server Dhcp Server Conﬁguration Dhcp serverDeﬁnition of Scopes and Reservations DNS server Lease timeWins server Domain 15 Dhcp server IP scopes deﬁnition Description Subnet mask First address, Last addressExclusions Parameters 00bca5f21e50 Lease Reservations Leases Bc-a5-f2-1e-50 20 Dhcp server list of leased and reserved IP addresses Windows RAS Dhcp server advanced options Declined options Proxy server Proxy server Enable non-transparent proxy serverProxy Server Conﬁguration 22 Http proxy server settings Enable connection to any TCP port Http//192.168.1.13128/pac/proxy.pac Forward to parent proxy server Enable cache on proxy server Enable cache on transparent proxyHttp cache Http protocol TTL Cache size Http cache Max Http object size Memory cache sizeCache Options URL URL Speciﬁc Settings TTL Cache status and administration 26 Http cache administration dialog Network Rules Wizard Traﬃc Policy Information Network Rules WizardSelection of Internet connection type Network Policy Wizard selection of a connected adapter Network adapter or dial-up selection Allow access to all services Internet access limitations Enabling Kerio VPN traﬃc Allow access to the following services only Service Service is running on Generating the rules NAT Icmp traﬃc Rules Created by the Wizard Local Traﬃc Firewall Traﬃc Deﬁnition of Custom Traﬃc Rules How traﬃc rules workName 12 Traﬃc rule name, color and rule description Source, Destination IP range e.g Deﬁnition of Custom Traﬃc Rules 100 Service 101 Action 102 Log 103 Translation 20 Traﬃc rule destination address translation 104 Protocol inspector Valid on105 IP Translation NAT Basic Traﬃc Rule TypesSource Destination Placing the rule TranslationPort mapping 107 108 Multihoming Limiting Internet Access109 110 111 Exclusions 112 Speed limits for big data volumes transmissions How the bandwidth limiter works and how to use itBandwidth Limiter Speed limits for users with their quota exceeded Bandwidth Limiter conﬁguration Setting limit valuesBandwidth Limiter 114 Advanced Options Services115 116 IP Addresses and Time Interval 117 Bandwidth Limiter selection of network services 118 Detection of connections with large data volume transferred Examples Detection of connections with large data volume transferred119 120 Firewall User Authentication User Authentication121 User authentication advanced options User Authentication122 Redirection to the authentication Firewall User AuthenticationEnable non-transparent proxy server authentication Automatic authentication Ntlm 124 Automatically logout users when they are inactive Enable Web Interface Http Enable Kerio SSL-VPN serverWeb Interface Web Interface Parameters Conﬁguration Allow access only from these IP addresses Enable secured Web Interface HttpsWeb Interface WinRoute server name 127 Conﬁguration of ports of the Web Interface Generate or Import Certiﬁcate SSL Certiﬁcate for the Web Interface128 SSL certiﬁcate of WinRoute’s Web interface 129 Web Interface Language Preferences Login/logoutUsers logged 130 Drdolittle@usoffice.company.com Login/logout131 Log out User password authentication132 Status information and user statistics Status information and user statistics133 134 User preferences User preferences Save settings135 136 10 Editing user password FTP protocol Http protocol137 URL Rules Conditions for Http and FTP ﬁltering138 139 URL Rules 140 URL Rules Deﬁnition URL matches criteria If user accessing the URL is141 142 Allow access to the Web site Valid for IP address group Valid at time intervalValid if Mime type is Denial options Scan content for viruses according to scanning rules WWW content scanning optionsDeny Web pages containing 144 145 Http Inspection Advanced Options Allow Html ActiveX objects Global rules for Web elementsAllow Script Html tags 146 Allow Html JavaScript pop-up windows Content Rating System ISS OrangeWeb FilterAllow applet Html tags Allow cross-domain referrer 148 ISS OrangeWeb Filter conﬁguration Categorize each page regardless of Http rules Enable ISS OrangeWeb FilterServer ISS OrangeWeb Filter Deployment ISS OrangeWeb Filter rule 150 151 Web content ﬁltering by word occurrence 152 Deﬁnition of rules ﬁltering by word occurrence 153 Word groups 154 Deﬁnition of forbidden words FTP Policy WeightGroup Keyword FTP Rules Deﬁnition If user accessing the FTP server isFTP server is 156 15 FTP Rule basic parameters 158 Content 159 Conditions and limitations of antivirus scan Antivirus control160 161 Conditions and limitations of antivirus scan Antivirus control How to choose and setup antivirusesIntegrated McAfee 162 Last update check performed ... ago Check for update every ... hoursUpdate now Current virus database is External antivirus Antivirus settings164 An example of a traﬃc rule for outgoing Smtp traﬃc check 165 Http and FTP scanning 167 Http and FTP scanning Condition Http and FTP scanning rules168 169 Mime type 170 Email scanning 171 Email scanning 172 Creating and Editing IP Address Groups IP Address Groups173 Deﬁnitions Time IntervalsName Type Absolute Time range typesWeekly Daily From, To Time Interval TypeValid at days 176 Services Services177 Protocol inspector Protocol178 Protocol Inspectors Source Port and Destination Port179 180 URL Groups 181 URL Groups 182 Deﬁnitions Group Internal user database User Accounts and GroupsImport of user accounts from Active Directory 183 User Accounts and Groups Viewing and deﬁnitions of user accounts184 Local user accounts Accounts mapped from the Active Directory domain Local user accountsEdit User 186 Creating a local user account Local user accountsBasic information Full Name Account is disabled AuthenticationEmail Address Domain template Groups NT domain / Kerberos189 190 Access rights Read only access to administration No access to administrationFull access to administration User can override WWW content rules Transfer quota Data transmission quota192 Quota exceed action Content rules193 194 User’s IP addresses 195 Editing User Account NT domain Active Directory196 197 Automatic import of user accounts from Active Directory 198 Manual import of user accounts Active Directory domains mapping Active Directory domains mappingDomain mapping requirements 199 Single domain mapping Domain AccessActive Directory mapping 200 13 Active Directory domain mapping 201 Multiple domains mapping NT authentication support202 16 Conversion of user accounts 203 User groups Deﬁnitions User groups204 Creating a new local user group User groupsName and description of the group 205 Read only access Group access rightsGroup members 206 Users can connect using VPN Users can override WWW content rules207 Users are allowed to view statistics Users are allowed to use P2P networks208 Setting Remote Administration Remote Administration and Update ChecksHow to allow remote administration from the Internet 209 Remote Administration and Update Checks Update Checking210 Check for new versions Update CheckingCheck also for beta versions Check now 212 15.1 P2P Eliminator Advanced security featuresP2P Eliminator Conﬁguration 213 214 Advanced security features Parameters for detection of P2P networks 15.1 P2P Eliminator215 216 Special Security Settings Anti-Spooﬁng Special Security SettingsConnections Count Limit 217 Enable VPN using IPSec ProtocolEnable pass-through only for hosts IPSec preferences WinRoute’s IPSec conﬁguration VPN using IPSec ProtocolIPSec client in local network 219 Traﬃc rule for one IPSec client in the local network 220 221 IPSec server in local network Routing table Other settings Route Types Routing tableStatic routes 223 Network, Network Mask Deﬁnitions of Dynamic and Static RulesGateway Metric Demand Dial Demand DialRemoving routes from the Routing Table How demand dial works 226 227 Technical Peculiarities and Limitations 228 Setting Rules for Demand Dial 229 Dial of local DNS names Port mapping timeout Enable UPnPUniversal Plug-and-Play UPnP Conﬁguration of the UPnP support Relay Smtp server Relay Smtp serverLog packets Log connections Specify sender email address in From header Smtp requires authenticationTest 232 233 Active hosts and connected users Status Information234 Login duration Login timeHostname User Active Hosts dialog options Detailed information on a selected host and user 238 Traﬃc information Connections Activity Description239 240 Source, Destination 241 Histogram 242 Show connections related to the selected process 243 Show connections related to the selected process Kill connection Options of the Connections Dialog244 Font Color Color SettingsBackground Color 245 Alerts Alerts Settings246 Alert Alerts247 248 Alert Templates Alerts overview in Administration Console \Program Files\Kerio\WinRoute Firewall\templates by default249 13 Details of a selected event 250 Interface statistics Basic statistics251 Basic statistics Reset interface statisticsInterface Statistics menu 252 Remove interface statistics Interface statisticsGraphical view of interface load 253 254 User Statistics data volumes and quotas User Statistics dialog options User Statistics data volumes and quotas255 Remove user statistics Reset user statisticsView host 256 Monitoring and storage of statistic data Kerio StaR statistics and reporting257 Kerio StaR statistics and reporting Settings for statistics and quotaRequirements of the statistics 258 Enable/disable gathering of statistic data Settings for statistics and quotaAdvanced settings for statistics 259 260 Statistics and quota restrictions Remote access to the statistics Accessing the statistics from the WinRoute hostConnection to StaR and viewing statistics Statistics and quota accounting periods 262 StaR page in the web interface 263 Accounting period Custom accounting period 264 Overall View Overall View265 Top 5 users Top Requested Web Categories266 267 Used Protocol 268 User statistics User statistics269 13 The Users by Traﬃc table Users by Traﬃc Top Visited Websites Top Visited Websites 272 Top Requested Web Categories 16 Top visited websites sorted by categories 273 274 Logs Log settingsFilename.log 275 276 File Logging Syslog Logging Log settings277 Logs Context Menu Find Logs Context MenuHighlighting Select font Log debug Logs EncodingClear log Log highlighting Log highlighting settings 282 Debug log advanced settings Alert Log Alert Log Logs 20.4 Conﬁg Log284 Connection Log Connection Log285 Dial Log Debug Log286 Page 288 15/Mar/2004 155912 Line Connection disconnected Error Log Error Log289 Filter Log ’McAfee update’ rule name290 Http log Http log291 292 1058444114.733 0 192.168.64.64 TCPMISS/304 Security Log Security Log293 294 Authentication service Client IP address reason Sslvpn Log Sslvpn Log17/Dec/2004 121133 Engine Startup 17/Dec/2004 122243 Engine Shutdown 24/Apr/2003 102951 192.168.44.128 james Web Log Web Log 297 298 Kerio VPN 299 VPN Server Conﬁguration Kerio VPN Enable VPN serverGeneral IP address assignment 301 SSL certiﬁcate Listen on port Advanced302 303 Custom Routes Basic conﬁguration of traﬃc rules for VPN clients 21.2 Conﬁguration of VPN clients304 Deﬁnition of a tunnel to a remote server Setting up VPN serversName of the tunnel 305 306 Conﬁguration 307 Conﬁguration of a remote end of the tunnel Routing settings DNS Settings308 309 Connection establishment 310 Traﬃc Policy Settings for VPN Exchange of routing information Exchange of routing informationRouting conﬁguration options 311 Routes provided automatically Update of routing tables312 Speciﬁcation Example of Kerio VPN conﬁguration company with a ﬁlial oﬃce313 314 Common method 315 316 Headquarters conﬁguration 317 14 Headquarter creating default traﬃc rules for Kerio VPN 16 Headquarter DNS forwarder conﬁguration 318 319 19 Headquarters VPN server conﬁguration 320 321 LAN 322 Conﬁguration of a ﬁlial oﬃce 323 24 Filial oﬃce default traﬃc rules for Kerio VPN 25 Filial oﬃce DNS forwarder conﬁguration 324 325 28 Filial oﬃce VPN server conﬁguration 326 29 Filial oﬃce deﬁnition of VPN tunnel for the headquarters 327 VPN test Example of a more complex Kerio VPN conﬁguration328 329 Common method 330 331 332 33 Headquarter creating default traﬃc rules for Kerio VPN 35 Headquarter DNS forwarder conﬁguration 333 Kerio VPN 38 Headquarters VPN server conﬁguration 335 39 Headquarter deﬁnition of VPN tunnel for the London ﬁlial 336 337 338 43 Headquarter ﬁnal traﬃc rules 339 340 Conﬁguration of the London ﬁlial 341 46 The London ﬁlial oﬃce default traﬃc rules for Kerio VPN 342 48 The London ﬁlial oﬃce DNS forwarding settings 343 344 345 54 The London ﬁlial oﬃce ﬁnal traﬃc rules 346 347 Conﬁguration of the Paris ﬁlial 57 The Paris ﬁlial oﬃce DNS forwarder conﬁguration 348 59 The Paris ﬁlial oﬃce VPN server conﬁguration 349 350 351 352 64 The Paris ﬁlial oﬃce ﬁnal traﬃc rules 353 354 22.1 Conﬁguration of WinRoute’s SSL-VPN Kerio Clientless SSL-VPNSSL-VPN conﬁguration 355 Kerio Clientless SSL-VPN Allowing access from the Internet356 Usage of the SSL-VPN interface Usage of the SSL-VPN interfaceHttps//server Https//server12345 Handling ﬁles and folders Sidneywashington@usoffice.company.com358 Antivirus control \\server\folder\subfolderBookmarks 359 Detection of incorrect conﬁguration of the default gateway Troubleshooting360 23.2 Conﬁguration Backup and Transfer License SslcertCache.CFS Dnscache.cfg Star Handling conﬁguration ﬁles Conﬁguration backup recovery363 List name=Interfaces General conditions Automatic user authentication using Ntlm365 366 WinRoute Conﬁguration Ntlm authentication process Automatic user authentication using NtlmWeb browsers Microsoft Internet Explorer Firefox/Netscape/Mozilla/SeaMonkey conﬁguration Firefox/Netscape/Mozilla/SeaMonkey368 Partial Retirement of Protocol Inspector Partial Retirement of Protocol Inspector369 User accounts and groups in traﬃc rules How to enable certain users to access the Internet370 371 Enabling automatic authentication Example of a client conﬁguration web browser FTP on WinRoute’s proxy server372 FTP on WinRoute’s proxy server Example of a client conﬁguration Total Commander373 374 12 Setting proxy server for FTP in Total Commander Basic Information and System Requirements Network Load BalancingNetwork Conﬁguration 375 376 Network Load Balancing NLB conﬁguration for Server1 24.3 Conﬁguration of the servers in the cluster377 Server 1 cluster parameters 378 379 NLB conﬁguration for Server2 Essential Information Technical supportDescription 380 Tested in Beta version Error Log FilesInformational File License type and license number United Kingdom ContactsCzech Republic Legal Presumption Libiconv Used open-source librariesOpenSSL 384 Copyright 2005 Sam Stephenson PrototypeZlib 385 Glossary of terms Default gatewayActiveX Cluster Greylisting Firewall387 IPSec Glossary of terms IP addressKerberos 388 P2P network Network adapterPacket Port Proxy server Glossary of termsRouting table Script 391 Spooﬁng 392 TCP/IP 393 Index 394 Index 395 Ntlm 396 VPN 397 133