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2017-06-13T05:42:15.545186
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%META:TOPICPARENT{name="VOSIndex"}% ---+ Safeguarding your Virtuoso-hosted SPARQL Endpoint ---++What? Protecting Virtuoso-hosted SPARQL Endpoint. ---++Why? SPARQL endpoints are easy for random visitors to accidentally overload. Virtuoso allows you to secure your SPARQL endpoint against such abuses in various ways. ---++How? The following section should be added to the Virtuoso configuration file (e.g., <code>/opt/virtuoso/database/virtuoso.ini</code>) to safeguard your SPARQL endpoint against excessive usage: <verbatim> [SPARQL] MaxCacheExpiration = 1 ; Cache Expiration time in seconds; overrides Sponger's default cache invalidation scheme ExternalQuerySource = 1 ExternalXsltSource = 1 ResultSetMaxRows = 100000 ;DefaultGraph = http://demo.openlinksw.com/dataspace/person/demo MaxQueryCostEstimationTime = 10000 ; in seconds MaxQueryExecutionTime = 30 ; in seconds ;ImmutableGraphs = http://unknown:8890/dataspace ;PingService = http://rpc.pingthesemanticweb.com/ DefaultQuery = SELECT DISTINCT ?URI ?ObjectType WHERE { ?URI a ?ObjectType } LIMIT 50 DeferInferenceRulesInit = 1 ; Defer loading of inference rules at start up </verbatim> Details about these settings can be found in the [[http://docs.openlinksw.com/virtuoso/dbadm.html#ini_SPARQL][SPARQL Configuration File section]] of the [[http://docs.openlinksw.com/virtuoso/][Virtuoso Online Documentation]]. The "<code><nowiki>DeferInferenceRulesInit = 1</nowiki></code>" setting is particularly important when hosting large RDF data sets such as DBpedia, as it defers the load of the inference rules (which can take quite some time -- up to an hour!) until after basic server start-up. Virtuoso [[http://docs.openlinksw.com/virtuoso/wsacl.html][Web Services ACLs]] can also be used to limit access to the SPARQL endpoint. ---++Related * [[VirtTipsAndTricksGuideSPARQLEndpointProtection][SPARQL Endpoint Protection Methods Collection]] * [[http://docs.openlinksw.com/virtuoso/][Virtuoso documentation]] * [[http://docs.openlinksw.com/virtuoso/rdfsparql.html#rdfsupportedprotocolendpoint][SPARQL Service Endpoint]] * [[http://docs.openlinksw.com/virtuoso/rdfsparql.html#rdfsupportedprotocolendpointuri][Service Endpoint Security]] * [[http://docs.openlinksw.com/virtuoso/rdfsparql.html#sparqwebservicetbl][Managing a SPARQL Web Service Endpoint]] * [[http://docs.openlinksw.com/virtuoso/rdfsparql.html][SPARQL]] * [[VirtTipsAndTricksGuide][Virtuoso Tips and Tricks Collection]] * [[VirtSPARQLDET][SPARQL Endpoint DET Configuration Guide]] * [[VirtSPARQLSecurityWebID][WebID Protocol & SPARQL Endpoint ACLs Tutorial]] * [[VirtOAuthSPARQL][SPARQL OAuth Tutorial]] * [[VirtTipsAndTricksGuideSPARQLEndpoints][Securing SPARQL endpoints]] * [[http://ods.openlinksw.com/wiki/ODS/OdsSPARQLAuth][SPARUL over SPARQL using the http://cname:port/sparql-auth endpoint]] * [[VirtAuthServerUI][Virtuoso Authentication Server UI]] * [[VirtSPARQLSSL][Manage a SPARQL-WebID based Endpoint]] * [[VirtSetupSSL][Configure Virtuoso instance as an X.509 Certificate Authority and HTTPS listener]] * [[http://ods.openlinksw.com/wiki/ODS/ODSSetupSSL][Configure Virtuoso+ODS instance as an X.509 Certificate Authority and HTTPS listener]] * [[http://ods.openlinksw.com/wiki/ODS/VirtODSSecurityWebID][WebID Protocol Support in OpenLink Data Spaces]]. * Manage ODS Datadspaces Objects WebID Access Control Lists (ACLs): * [[http://ods.openlinksw.com/wiki/ODS/ODSBriefcaseWebID][ODS Briefcase WebID based ACL Guide]] * [[http://ods.openlinksw.com/wiki/ODS/ODSBriefcaseWebIDPerson][Person Entity WebID based ACL Guide]] * [[http://ods.openlinksw.com/wiki/ODS/ODSBriefcaseWebIDGroup][Group Entity WebID based ACL Guide]] * [[http://ods.openlinksw.com/wiki/ODS/ODSBriefcaseWebIDPublic][Public WebID based ACL Guide]] * [[http://ods.openlinksw.com/wiki/ODS/ODSFeedManagerWebIDACL][ODS Feed Manager WebID based ACL Guide]] * [[http://ods.openlinksw.com/wiki/ODS/ODSFeedManagerWebIDACLPerson][Person Entity Specific ACL]] * [[http://ods.openlinksw.com/wiki/ODS/ODSFeedManagerWebIDACLGroup][Group Entity Specific ACL]] * [[http://ods.openlinksw.com/wiki/ODS/ODSFeedManagerWebIDACLPublic][Public Specific ACL for anyone with a WebID]] * [[http://ods.openlinksw.com/wiki/ODS/ODSCalendarWebIDACL][ODS Calendar WebID based ACL Guide]] * [[http://ods.openlinksw.com/wiki/ODS/ODSCalendarWebIDACLPerson][Person Entity Specific ACL]] * [[http://ods.openlinksw.com/wiki/ODS/ODSCalendarWebIDACLGroup][Group Entity Specific ACL]] * [[http://ods.openlinksw.com/wiki/ODS/ODSCalendarWebIDACLPublic][Public Specific ACL for anyone with a WebID]] * [[http://ods.openlinksw.com/wiki/ODS/ODSBookmarksWebIDACL][ODS Bookmark Manager WebID based ACL Guide]] * [[http://ods.openlinksw.com/wiki/ODS/ODSBookmarksWebIDACLPerson][Person Entity Specific ACL]] * [[http://ods.openlinksw.com/wiki/ODS/ODSBookmarksWebIDACLGroup][Group Entity Specific ACL]] * [[http://ods.openlinksw.com/wiki/ODS/ODSBookmarksWebIDACLPublic][Public Specific ACL for anyone with a WebID]] * [[http://ods.openlinksw.com/wiki/ODS/ODSAddressBookWebIDACL][ODS Addressbook WebID based ACL Guide]] * [[http://ods.openlinksw.com/wiki/ODS/ODSAddressBookWebIDACLPerson][Person Entity Specific ACL]] * [[http://ods.openlinksw.com/wiki/ODS/ODSAddressBookWebIDACLGroup][Group Entity Specific ACL]] * [[http://ods.openlinksw.com/wiki/ODS/ODSAddressBookWebIDACLPublic][Public Specific ACL for anyone with a WebID]] * [[http://ods.openlinksw.com/wiki/ODS/ODSPkiSetup][Guide for Set up a X.509 certificate issuer and HTTPS listener and generate ODS user certificates.]] * [[http://ods.openlinksw.com/wiki/ODS/VirtODSPubSubHub][Setting up PubSubHub in ODS]] * [[http://ods.openlinksw.com/wiki/ODS/VirtPubSubHub][PubSubHubBub Demo Client Example]] * [[http://ods.openlinksw.com/wiki/ODS/VirtFeedPubSubHub][Feed subscription via PubSubHub protocol Example ]] * [[http://ods.openlinksw.com/wiki/ODS/VirtPubSubHubACL][Setting Up PubSubHub to use WebID Protocol or IP based control lists]] * [[http://ods.openlinksw.com/wiki/ODS/OdsKeyImport][CA Keys Import using Conductor]] * [[http://ods.openlinksw.com/wiki/ODS/ODSGenerateX509Certificate][Generate an X.509 Certificate hosted WebID Guide]] * [[http://ods.openlinksw.com/wiki/ODS/ODSGenerateWebIDX509CertOSKeystore][Generate an X.509 Certificate (with a WebID watermark) to be managed by host operating system keystore]] * [[http://ods.openlinksw.com/wiki/ODS/ODSGenerateWebIDX509CertBrsKeystore][Generate an X.509 Certificate (with a WebID watermark) to be managed by a browser-based keystore]] * [[http://ods.openlinksw.com/wiki/ODS/ODSWebIDIdP][Using Virtuoso's WebID Verification Proxy Service with a WebID-bearing X.509 certificate]] * [[http://ods.openlinksw.com/wiki/ODS/ODSWebIDIdpProxy][Using Virtuoso's WebID Identity Provider (IdP) Proxy Service with an X.509 certificate]] * [[http://ods.openlinksw.com/wiki/ODS/ODSBriefcaseWebIDShareFile][ODS Briefcase WebID Protocol Share File Guide]] * [[http://esw.w3.org/topic/foaf+ssl][WebID Protocol Specification]] * [[https://foaf.me/simpleLogin.php][Test WebID Protocol Certificate page]] * [[http://test.foafssl.org/cert/][WebID Protocol Certificate Generation page]] CategoryVirtuoso CategoryHowTo CategorySPARQL CategoryOAuth CategoryFOAFSSL CategoryDocumentation CategoryTutorial
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