{"id":32137,"date":"2019-10-31T21:45:21","date_gmt":"2019-10-31T18:45:21","guid":{"rendered":"https:\/\/prohoster.info\/blog\/nastrojka-ipsec-site-to-site-vpn-na-oborudovanii-palo-alto-networks\/"},"modified":"2019-10-31T21:45:21","modified_gmt":"2019-10-31T18:45:21","slug":"nastrojka-ipsec-site-to-site-vpn-na-oborudovanii-palo-alto-networks","status":"publish","type":"post","link":"https:\/\/prohoster.info\/da\/blog\/administrirovanie\/nastrojka-ipsec-site-to-site-vpn-na-oborudovanii-palo-alto-networks","title":{"rendered":"Konfiguration af IPSec Site-to-Site VPN p\u00e5 Palo Alto Networks-udstyr","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><img decoding=\"async\" alt=\"Konfiguration af IPSec Site-to-Site VPN p\u00e5 Palo Alto Networks-udstyr\" src=\"\/wp-content\/uploads\/2019\/04\/65e9f9ded1254535c40642a480432877.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nDenne artikel er en forts\u00e6ttelse <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/crosstech\/blog\/443726\/\">af tidligere materiale<\/a><\/noindex>, der handler om s\u00e6rlige aspekter ved konfigurationen af udstyr <b>Palo Alto Networks <\/b>. Her \u00f8nsker vi at fort\u00e6lle om konfigurationen af <b>IPSec Site-to-Site VPN<\/b> p\u00e5 udstyr <b>Palo Alto Networks<\/b> og om en mulig konfigurationsmulighed for tilslutning af flere internetudbydere.<br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><br \/>\nTil demonstration vil der blive brugt et standardopstillingsskema til at forbinde hovedkontoret med filialen. For at sikre et fejltolerant internetforbindelse anvender hovedkontoret samtidig forbindelser fra to udbydere: ISP-1 og ISP-2. Filialen er kun tilsluttet \u00e9n udbyder, ISP-3. Der oprettes to tunneler mellem de to firewalls PA-1 og PA-2. Tunnelerne arbejder i tilstanden <b>Active-Standby<\/b>, Tunnel-1 er aktiv, Tunnel-2 begynder at overf\u00f8re trafik ved fejlen af Tunnel-1. Tunnel-1 bruger forbindelsen til internetudbyderen ISP-1, Tunnel-2 bruger forbindelsen til internetudbyderen ISP-2. Alle IP-adresser er genereret tilf\u00e6ldigt til demonstrationsform\u00e5l og har ingen relation til virkeligheden.<\/p>\n<p><img decoding=\"async\" alt=\"Konfiguration af IPSec Site-to-Site VPN p\u00e5 Palo Alto Networks-udstyr\" src=\"\/wp-content\/uploads\/2019\/04\/e1e9c97bdcea77c3c1adf44e48f1c275.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nTil opbygning af Site-to-Site VPN vil der blive brugt <b>IPSec<\/b> \u2014 et s\u00e6t protokoller til at sikre beskyttelse af data, der overf\u00f8res via IP-protokollen. <b>IPSec <\/b>vil fungere ved brug af sikkerhedsprotokollen <b>ESP <\/b>(Encapsulating Security Payload), hvilket sikrer kryptering af de overf\u00f8rte data.<\/p>\n<p>I <b>IPSec <\/b>indg\u00e5r <b>IKE <\/b>(Internet Key Exchange) \u2014 protokollen, der er ansvarlig for forhandling af SA (sikkerhedsassociationer), sikkerhedsparametre, der bruges til at beskytte de overf\u00f8rte data. PAN-firewalls underst\u00f8tter <b>IKEv1 <\/b>og <b>IKEv2<\/b>.<\/p>\n<p>I <b>IKEv1 <\/b>VPN-forbindelsen opbygges i to trin: <b>IKEv1 fase 1 <\/b>(IKE tunnel) og <b>IKEv1 fase 2<\/b> (IPSec tunnel), s\u00e5ledes oprettes der to tunneler, hvoraf den ene bruges til at udveksle kontrolinformation mellem firewalls, mens den anden bruges til trafikoverf\u00f8rsel. I <b>IKEv1 fase 1<\/b> der findes to driftsmodi \u2014 main mode og aggressive mode. Aggressive mode bruger f\u00e6rre meddelelser og k\u00f8rer hurtigere, men underst\u00f8tter ikke Peer Identity Protection.<\/p>\n<p><b>IKEv2 <\/b>afl\u00f8ste <b>IKEv1<\/b>, og i forhold til <b>IKEv1<\/b> dens st\u00f8rste fordel er lavere b\u00e5ndbreddekrav og hurtigere forhandling af SA. I <b>IKEv2<\/b> bruger f\u00e6rre kontrolmeddelelser (kun 4), underst\u00f8tter EAP-protokollen, MOBIKE og introducerer en mekanisme til kontrol af tilg\u00e6ngeligheden af den peer, som tunnelen oprettes med \u2014 <b>Liveness Check<\/b>, der erstatter Dead Peer Detection i IKEv1. Hvis kontroltesten ikke best\u00e5r, s\u00e5 <b>IKEv2 <\/b>kan den nulstille tunnelen og automatisk genskabe den ved f\u00f8rste mulighed. L\u00e6s mere om forskellene <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.paloaltonetworks.com\/pan-os\/8-0\/pan-os-admin\/vpns\/site-to-site-vpn-concepts\/ikev2\">her<\/a><\/noindex>.<\/p>\n<p>. Hvis tunnelen oprettes mellem firewalls fra forskellige producenter, kan der v\u00e6re bugs i implementeringen <b>IKEv2<\/b>, og for kompatibilitet med s\u00e5dan udstyr kan man bruge <b>IKEv1<\/b>. I andre tilf\u00e6lde er det bedre at anvende <b>IKEv2<\/b>.<\/p>\n<p>Ops\u00e6tningsfaser:<\/p>\n<p><b>\u2022 Ops\u00e6tning af to internetudbydere i ActiveStandby-tilstand<\/b><\/p>\n<p>Der er flere m\u00e5der at implementere denne funktion p\u00e5. En af dem involverer brugen af mekanismen <b>Path Monitoring<\/b>, som blev tilg\u00e6ngelig fra version <b>PAN-OS 8.0.0<\/b>. I dette eksempel bruges version 8.0.16. Denne funktion ligner IP SLA i Cisco-routere. I parameteren for den statiske standardrute konfigureres ping-pakker til at blive sendt til en bestemt IP-adresse fra en bestemt kildeadresse. I dette tilf\u00e6lde pinger ethernet1\/1 standardgatewayen \u00e9n gang i sekundet. Hvis der ikke er noget svar p\u00e5 tre p\u00e5 hinanden f\u00f8lgende pings, betragtes ruten som inaktiv og fjernes fra routingtabellen. Den samme rute konfigureres mod den anden internetudbyder, men med en h\u00f8jere metrisk v\u00e6rdi (den er backup). S\u00e5 snart den f\u00f8rste rute fjernes fra tabellen, begynder firewallen at sende trafik via den anden rute \u2014 <b>Fail-Over<\/b>. N\u00e5r den f\u00f8rste udbyder begynder at svare p\u00e5 pings, vil dets rute vende tilbage til tabellen og erstatte den anden p\u00e5 grund af en bedre metrisk v\u00e6rdi \u2014 <b>Fail-Back<\/b>. Processen <b>Fail-Over<\/b> tager flere sekunder afh\u00e6ngigt af de indstillede intervaller, men i alle tilf\u00e6lde er processen ikke \u00f8jeblikkelig, og i denne tid g\u00e5r trafikken tabt. <b>Fail-Back<\/b> forl\u00f8ber uden trafik tab. Der er mulighed for at g\u00f8re den <b>Fail-Over<\/b> hurtigere, ved hj\u00e6lp af <b>BFD<\/b>, hvis internetudbyderen tilbyder denne mulighed. <b>BFD <\/b>st\u00f8ttes fra modellen <b>PA-3000 Series<\/b> og <b>VM-100<\/b>. For ping-adressen er det bedre at angive ikke gatewayen fra udbyderen, men en offentlig, altid tilg\u00e6ngelig internetadresse.<\/p>\n<p><img decoding=\"async\" alt=\"Konfiguration af IPSec Site-to-Site VPN p\u00e5 Palo Alto Networks-udstyr\" src=\"\/wp-content\/uploads\/2019\/04\/91f85e24112d5c997dc17d6492be2621.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<b>\u2022 Oprettelse af tunnelinterface<\/b><\/p>\n<p>Trafik inde i tunnelen overf\u00f8res gennem specielle virtuelle interfaces. P\u00e5 hver af dem skal der v\u00e6re tildelt en IP-adresse fra transitnetv\u00e6rket. I dette eksempel vil Tunnel-1 bruge subnettet 172.16.1.0\/30, og Tunnel-2 vil bruge subnettet 172.16.2.0\/30.<br \/>\nTunnelinterfacet oprettes i sektionen <b>Netv\u00e6rk -&gt; Gr\u00e6nseflader -&gt; Tunnel<\/b>. Du skal angive den virtuelle router og sikkerhedszonen, samt IP-adressen fra det tilsvarende transportnetv\u00e6rk. Interface-nummeret kan v\u00e6re vilk\u00e5rligt.<\/p>\n<p><img decoding=\"async\" alt=\"Konfiguration af IPSec Site-to-Site VPN p\u00e5 Palo Alto Networks-udstyr\" src=\"\/wp-content\/uploads\/2019\/04\/4d6ae0695e80de2ab86e791d4a77fb1a.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<img decoding=\"async\" alt=\"Konfiguration af IPSec Site-to-Site VPN p\u00e5 Palo Alto Networks-udstyr\" src=\"\/wp-content\/uploads\/2019\/04\/cd80ff75d9b2855892cb22e2d8f9d8d0.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nI sektionen <b>Avanceret <\/b>kan du angive <b>Administrationsprofil<\/b>, som tillader ping p\u00e5 denne gr\u00e6nseflade, hvilket kan v\u00e6re nyttigt til test.<\/p>\n<p><img decoding=\"async\" alt=\"Konfiguration af IPSec Site-to-Site VPN p\u00e5 Palo Alto Networks-udstyr\" src=\"\/wp-content\/uploads\/2019\/04\/8eb1b7a0d97e4b2528a0c1d98677ca1f.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<b>\u2022 Konfiguration af IKE-profil<\/b><\/p>\n<p><b>IKE-profil<\/b> ansvarlig for det f\u00f8rste trin i oprettelsen af VPN-forbindelsen, her angives tunnelparametrene <b>IKE Fase 1<\/b>. Profilen oprettes i sektionen <b>Netv\u00e6rk -&gt; Netv\u00e6rksprofiler -&gt; IKE Kryptografi<\/b>. Du skal angive krypteringsalgoritmen, hash-algoritmen, Diffie-Hellman-gruppen og n\u00f8glelivsl\u00e6ngden. Generelt g\u00e6lder, jo mere komplekse algoritmerne er, desto d\u00e5rligere ydeevne, de skal v\u00e6lges ud fra specifikke sikkerhedskrav. Det anbefales dog kraftigt ikke at bruge en Diffie-Hellman-gruppe under 14 til beskyttelse af vigtig information. Dette skyldes s\u00e5rbarheden i protokollen, som kun kan neutraliseres ved at bruge modulst\u00f8rrelser p\u00e5 2048 bit og derover eller elliptiske kryptografiske algoritmer, der anvendes i grupperne 19, 20, 21, 24. Disse algoritmer har bedre ydeevne sammenlignet med traditionel kryptografi. <noindex><a rel=\"nofollow\" href=\"https:\/\/arstechnica.com\/information-technology\/2016\/10\/how-the-nsa-could-put-undetectable-trapdoors-in-millions-of-crypto-keys\/\">L\u00e6s mere her<\/a><\/noindex>. Og <noindex><a rel=\"nofollow\" href=\"https:\/\/www.cisco.com\/c\/en\/us\/about\/security-center\/next-generation-cryptography.html\">her<\/a><\/noindex>.<\/p>\n<p><img decoding=\"async\" alt=\"Konfiguration af IPSec Site-to-Site VPN p\u00e5 Palo Alto Networks-udstyr\" src=\"\/wp-content\/uploads\/2019\/04\/0ae865d3175cda77e91ae0dc3a304dda.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<b>\u2022 Konfiguration af IPSec-profil<\/b><\/p>\n<p>Det andet trin i oprettelsen af VPN-forbindelsen \u2014 IPSec tunnel. SA-parametrene for den indstilles i <b>Netv\u00e6rk -&gt; Netv\u00e6rksprofiler -&gt; IPSec Kryptografiprofil<\/b>. Her skal du angive IPSec-protokollen \u2014 <b>AH <\/b>eller <b>ESP<\/b>, samt parametrerne <b>SA <\/b> \u2014 hash-algoritmer, krypteringsalgoritmer, Diffie-Hellman-grupper og n\u00f8glelivsl\u00e6ngden. SA-parametrene i IKE Kryptografiprofil og IPSec Kryptografiprofil kan v\u00e6re forskellige.<\/p>\n<p><img decoding=\"async\" alt=\"Konfiguration af IPSec Site-to-Site VPN p\u00e5 Palo Alto Networks-udstyr\" src=\"\/wp-content\/uploads\/2019\/04\/d375361041882306b916d46dcf18a38c.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<b>\u2022 Konfiguration af IKE Gateway<\/b><\/p>\n<p><b>IKE Gateway<\/b> er et objekt, der repr\u00e6senterer routeren eller firewallen, som VPN-tunnelen etableres med. For hver tunnel skal der oprettes sin egen <b>IKE Gateway<\/b>. I dette tilf\u00e6lde oprettes der to tunneler, en gennem hver internetudbyder. Den tilsvarende udg\u00e5ende gr\u00e6nseflade og dens IP-adresse, peerens IP-adresse og den f\u00e6lles n\u00f8gle angives. Som alternativ til den f\u00e6lles n\u00f8gle kan der anvendes certifikater.<\/p>\n<p><img decoding=\"async\" alt=\"Konfiguration af IPSec Site-to-Site VPN p\u00e5 Palo Alto Networks-udstyr\" src=\"\/wp-content\/uploads\/2019\/04\/902d6950a3b4127183659aaca252669e.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nHer angives den tidligere oprettede <b>IKE Kryptografiprofil<\/b>. Parametrene for det andet objekt <b>IKE Gateway<\/b> er ens, med undtagelse af IP-adresserne. Hvis Palo Alto Networks firewallen er placeret bag en NAT-router, skal mekanismen aktiveres <b>NAT Traversal<\/b>.<\/p>\n<p><img decoding=\"async\" alt=\"Konfiguration af IPSec Site-to-Site VPN p\u00e5 Palo Alto Networks-udstyr\" src=\"\/wp-content\/uploads\/2019\/04\/4fc32cafe491c86344aa9484a019bd1f.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<b>\u2022 Konfiguration af IPSec Tunnel<\/b><\/p>\n<p><b>IPSec Tunnel<\/b> Dette er et objekt, hvor parametrene for IPSec-tunnelen angives, som navnet antyder. Her skal den tunnelinterface og de tidligere oprettede objekter angives. <b>IKE Gateway<\/b>, <b>IPSec Krypteringsprofil<\/b>. For at sikre automatisk ruteskift til backup-tunnelen skal man aktivere <b>Tunneloverv\u00e5gning<\/b>. Dette er en mekanisme, der tjekker, om peer er aktiv ved hj\u00e6lp af ICMP-trafik. Som destinationsadresse skal IP-adressen p\u00e5 tunnelinterfacet til den peer, som tunnelen opbygges med, angives. Profilen angiver timere og handlinger ved tab af forbindelse. <b>Vent p\u00e5 genopretning<\/b> \u2013 at vente, indtil forbindelsen er genoprettet, <b>Fejlskift<\/b> \u2014 at sende trafikken via en anden rute, hvis en s\u00e5dan er tilg\u00e6ngelig. Indstillingerne for den anden tunnel er identiske; den anden tunnelinterface og IKE Gateway skal angives.<\/p>\n<p><img decoding=\"async\" alt=\"Konfiguration af IPSec Site-to-Site VPN p\u00e5 Palo Alto Networks-udstyr\" src=\"\/wp-content\/uploads\/2019\/04\/e609b3916a3b2f58342c5a368b8e9ae0.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<img decoding=\"async\" alt=\"Konfiguration af IPSec Site-to-Site VPN p\u00e5 Palo Alto Networks-udstyr\" src=\"\/wp-content\/uploads\/2019\/04\/91d0da4549f2298588ab99f1cfd7194b.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<b>\u2022 Konfiguration af routing<\/b><\/p>\n<p>I dette eksempel anvendes statisk routing. P\u00e5 firewall\u2019en PA-1 skal der udover to standardruter angives to ruter til subnettet 10.10.10.0\/24 i filialen. \u00c9n rute bruger Tunnel-1, den anden Tunnel-2. Ruten gennem Tunnel-1 er den prim\u00e6re, da den har en lavere metrik. Mekanismen <b>Path Monitoring<\/b> for disse ruter anvendes ikke. Overgangen varetages af <b>Tunneloverv\u00e5gning<\/b>.<\/p>\n<p><img decoding=\"async\" alt=\"Konfiguration af IPSec Site-to-Site VPN p\u00e5 Palo Alto Networks-udstyr\" src=\"\/wp-content\/uploads\/2019\/04\/865492c962787216747f876ae8e45156.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nDe samme ruter for subnettet 192.168.30.0\/24 skal konfigureres p\u00e5 PA-2.<\/p>\n<p><img decoding=\"async\" alt=\"Konfiguration af IPSec Site-to-Site VPN p\u00e5 Palo Alto Networks-udstyr\" src=\"\/wp-content\/uploads\/2019\/04\/6af420d6272d7cf38f44b0ded85cdfa6.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<b>\u2022 Konfiguration af netv\u00e6rksregler<\/b><\/p>\n<p>For at tunnelen fungerer, er der behov for tre regler:<\/p>\n<ol>\n<li>For at fungere <b>Path Monitor<\/b> tillade ICMP p\u00e5 de eksterne interfaces.<\/li>\n<li>For <b>IPSec <\/b>tillade applikationerne <b>ike <\/b>og <b>ipsec <\/b>p\u00e5 de eksterne interfaces.<\/li>\n<li>Tillad trafik mellem de interne subnetter og tunnelinterfaces.<\/li>\n<\/ol>\n<p>\n<img decoding=\"async\" alt=\"Konfiguration af IPSec Site-to-Site VPN p\u00e5 Palo Alto Networks-udstyr\" src=\"\/wp-content\/uploads\/2019\/04\/90525c88fb133cf9aa1cacefb51c9c98.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<b>Konklusion<\/b><\/p>\n<p>I denne artikel er en l\u00f8sning til ops\u00e6tning af en redundant internetforbindelse og<b> Site-to-Site VPN<\/b>. Vi h\u00e5ber, at informationen har v\u00e6ret nyttig, og at l\u00e6seren har f\u00e5et indsigt i de teknologier, der anvendes i <b>Palo Alto Networks<\/b>. Hvis du har sp\u00f8rgsm\u00e5l til konfigurationen eller \u00f8nsker emner til fremtidige artikler, s\u00e5 skriv dem i kommentarerne; vi vil v\u00e6re glade for at svare.<br \/>\n<br \/>Kilde: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/crosstech\/blog\/448952\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0414\u0430\u043d\u043d\u0430\u044f \u0441\u0442\u0430\u0442\u044c\u044f \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 \u0441\u043e\u0431\u043e\u0439 \u043f\u0440\u043e\u0434\u043e\u043b\u0436\u0435\u043d\u0438\u0435 \u043f\u0440\u0435\u0434\u044b\u0434\u0443\u0449\u0435\u0433\u043e \u043c\u0430\u0442\u0435\u0440\u0438\u0430\u043b\u0430, \u043f\u043e\u0441\u0432\u044f\u0449\u0435\u043d\u043d\u043e\u0433\u043e \u043e\u0441\u043e\u0431\u0435\u043d\u043d\u043e\u0441\u0442\u044f\u043c \u043d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0438 \u043e\u0431\u043e\u0440\u0443\u0434\u043e\u0432\u0430\u043d\u0438\u044f Palo Alto Networks . \u0417\u0434\u0435\u0441\u044c \u043c\u044b \u0445\u043e\u0442\u0438\u043c \u0440\u0430\u0441\u0441\u043a\u0430\u0437\u0430\u0442\u044c \u043e \u043d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0435 IPSec Site-to-Site VPN \u043d\u0430 \u043e\u0431\u043e\u0440\u0443\u0434\u043e\u0432\u0430\u043d\u0438\u0438 Palo Alto Networks \u0438 \u043e \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u043c \u0432\u0430\u0440\u0438\u0430\u043d\u0442\u0435 \u043a\u043e\u043d\u0444\u0438\u0433\u0443\u0440\u0430\u0446\u0438\u0438 \u043f\u043e\u0434\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u044f \u043d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u0438\u0445 \u0438\u043d\u0442\u0435\u0440\u043d\u0435\u0442-\u043f\u0440\u043e\u0432\u0430\u0439\u0434\u0435\u0440\u043e\u0432. \u0414\u043b\u044f \u0434\u0435\u043c\u043e\u043d\u0441\u0442\u0440\u0430\u0446\u0438\u0438 \u0431\u0443\u0434\u0435\u0442 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