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lordmilko / PrtgAPI

C#/PowerShell interface for PRTG Network Monitor
MIT License
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Question : DTD error when calling Get-Probe / Get-Device etc #216

Closed KoalaScripts closed 3 years ago

KoalaScripts commented 3 years ago

Dear ,

Its my first time using the Module in Powershell but i can't seem to get it working. I can make a connection to my PRTG server but once i try retrieving something it returns following error :

Get-Probe : For security reasons DTD is prohibited in this XML document. To enable DTD processing set the DtdProcessing property on XmlReaderSettings to Parse and pass the settings into XmlReader.Create method. At line:6 char:1

After a lot of searching i can only seem to bump on possible DNS issues. Would you be able to point me in the right direction into solving this issue?

Thank you in advance !

lordmilko commented 3 years ago

Hi @KoalaScripts,

Are you able to advise whether other cmdlets like Get-Device work? Nevermind, I see you mentioned Get-Device in the title

Are you able to provide the output of Get-PrtgClient -Diagnostic?

In addition, can you post the output of the following

Set-PrtgClient -LogLevel Response

Get-Device -Verbose

Regards, lordmilko

KoalaScripts commented 3 years ago

Hello @lordmilko ,

I get the same error for Get-Device & Get-Probe . When i run the command Get-PrtgClient - Diagnostic i get the following :

Get-PrtgClient -Diagnostic Get-PrtgClient : There was an error deserializing the object of type PrtgAPI.ServerStatus. Encountered unexpected character '<'. At line:1 char:1

lordmilko commented 3 years ago

Hi @KoalaScripts,

Interesting; are you able to advise what version of PRTG you use?

KoalaScripts commented 3 years ago

Hello @lordmilko

Our version at the moment is : 21.1.66.1664+

The added verbose returned following : 

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  function $bu_show(ll,bb){
    var t = {};
    t.en = '<b>Your web browser (%s) is out of date</b>. For more security, comfort and the best experience on this site: <a%s>Update your browser</a> <a%s>Ignore</a>';
    t.de = '<b>Ihr Browser (%s) ist veraltet</b>. Aktualisieren sie ihren Browser für mehr Sicherheit, Komfort und die einwandfreie Nutzung dieser Webseite. <a%s>Browser aktualisieren</a> <a%s>Ignorieren</a>';
    t.it = '<b>Il tuo browser (%s) non è aggiornato</b>. Ha delle falle di sicurezza e potrebbe non visualizzare correttamente le pagine di questo e altri siti. <a%s>Actualice su navegador</a> <a%s>Chiudi</a>';
    t.pl = 'Przeglądarka (%s), której używasz, jest przestarzała. Posiada ona udokumentowane <b>luki bezpieczeństwa, inne wady</b> oraz <b>ograniczoną funkcjonalność</b>. Tracisz możliwość skorzystania z pełni możliwości oferowanych przez niektóre strony int
ernetowe. <a%s>Dowiedz się jak zaktualizować swoją przeglądarkę</a>.';
    t.es = '<b>Su navegador (%s) no está actualizado</b>. Tiene fallos de seguridad conocidos y podría no mostrar todas las características de este y otros sitios web. <a%s>Averigüe cómo actualizar su navegador.</a> <a%s>Cerrar</a>';
    t.nl = 'Uw browser (%s) is <b>oud</b>. Het heeft bekende <b>veiligheidsissues</b> en kan <b>niet alle mogelijkheden</b> weergeven van deze of andere websites. <a%s>Lees meer over hoe uw browser te upgraden</a>';
    t.pt = '<b>Seu navegador (%s) está desatualizado</b>. Ele possui falhas de segurança e pode apresentar problemas para exibir este e outros websites. <a%s>Veja como atualizar o seu navegador</a> <a%s>Fechar</a>';
    t.sl = 'Vaš brskalnik (%s) je <b>zastarel</b>. Ima več <b>varnostnih pomankljivosti</b> in morda <b>ne bo pravilno prikazal</b> te ali drugih strani. <a%s>Poglejte kako lahko posodobite svoj brskalnik</a>';
    t.ru = 'Ваш браузер (%s) <b>устарел</b>. Он имеет <b>уязвимости в безопасности</b> и может <b>не показывать все возможности</b> на этом и других сайтах. <a%s>Узнайте, как обновить Ваш браузер</a>';
    t.id = 'Browser Anda (%s) sudah <b>kedaluarsa</b>. Browser yang Anda pakai memiliki <b>kelemahan keamanan</b> dan mungkin <b>tidak dapat menampilkan semua fitur</b> dari situs Web ini dan lainnya. <a%s> Pelajari cara memperbarui browser Anda</a>';
    t.uk = 'Ваш браузер (%s) <b>застарів</b>. Він <b>уразливий</b> й може <b>не відображати всі можливості</b> на цьому й інших сайтах. <a%s>Дізнайтесь, як оновити Ваш браузер</a>';
    t.ko = '지금 사용하고 계신 브라우저(%s)는 <b>오래되었습니다.</b> 알려진 <b>보안 취약점</b>이 존재하며, 새로운 웹 사이트가 <b>깨져 보일 수도</b> 있습니다. <a%s>브라우저를 어떻게 업데이트하나요?</a>';
    t.rm = 'Tes navigatur (%s) è <b>antiquà</b>. El cuntegna <b>problems da segirezza</b> enconuschents e mussa eventualmain <b>betg tut las funcziuns</b> da questa ed autras websites. <a%s>Emprenda sco actualisar tes navigatur</a>.';
    t.jp = 'お使いのブラウザ「%s」は、<b>時代遅れ</b>のバージョンです。既知の<b>脆弱性</b>が存在するばかりか、<b>機能不足</b>によって、サイトが正常に表示できない可能性があります。 <a%s>ブラウザを更新する方法を確認する</a>';
    t.fr = '<b>Votre navigateur (%s) est périmé</b>. Il contient des failles de sécurité et pourrait ne pas afficher certaines fonctionnalités des sites internet récents. <a%s>Mettre le navigateur à jour</a> <a%s>Fermer</a>';
    t.da = 'Din browser (%s) er <b>for&aelig;ldet</b>. Den har kendte <b>sikkerhedshuller</b> og kan m&aring;ske <b>ikke vise alle funktioner</b> p&aring; dette og andre websteder. <a%s>Se hvordan du opdaterer din browser</a>';
    t.sq = 'Shfletuesi juaj (%s) është <b>ca i vjetër</b>. Ai ka <b>të meta sigurie</b> të njohura dhe mundet të <b>mos i shfaqë të gjitha karakteristikat</b> e kësaj dhe shumë faqeve web të tjera. <a%s>Mësoni se si të përditësoni shfletuesin tuaj</a>';
    t.ca = 'El teu navegador (%s) està <b>desactualitzat</b>. Té <b>vulnerabilitats</b> conegudes i pot <b>no mostrar totes les característiques</b> d\'aquest i altres llocs web. <a%s>Aprèn a actualitzar el navegador</a>';
    t.fa = 'مرورگر شما (%s) <b>از رده خارج شده</b> می باشد. این مرورگر دارای <b>مشکلات امنیتی شناخته شده</b> می باشد و <b>نمی تواند تمامی ویژگی های این</b> وب سایت و دیگر وب سایت ها را به خوبی نمایش دهد. <a%s>در خصوص گرفتن راهنمایی درخصوص نحوه ی به روز رسانی
 مرورگر خود اینجا کلیک کنید.</a>';
    t.sv = 'Din webbläsare (%s) är <b>föråldrad</b>. Den har kända <b>säkerhetshål</b> och <b>kan inte visa alla funktioner korrekt</b> på denna och på andra webbsidor. <a%s>Uppdatera din webbläsare idag</a>';
    t.hu = 'Az Ön böngészője (%s) <b>elavult</b>. Ismert <b>biztonsági hiányosságai</b> vannak és esetlegesen <b>nem tud minden funkciót megjeleníteni</b> ezen vagy más weboldalakon. <a%s>Itt talál bővebb információt a böngészőjének frissítésével kapcsolatba
n</a>     ';
    t.gl = 'O seu navegador (%s) está <b>desactualizado</b>. Ten coñecidos <b>fallos de seguranza</b> e podería <b>non mostrar tódalas características</b> deste e outros sitios web. <a%s>Aprenda como pode actualizar o seu navegador</a>';
    t.cs = 'Váš prohlížeč (%s) je <b>zastaralý</b>. Jsou známy <b>bezpečnostní rizika</b> a možná <b>nedokáže zobrazit všechny prvky</b> této a dalších webových stránek. <a%s>Naučte se, jak aktualizovat svůj prohlížeč</a>';
    t.he = 'הדפדפן שלך (%s) <b>אינו מעודכן</b>. יש לו <b>בעיות אבטחה ידועות</b> ועשוי <b>לא להציג את כל התכונות</b> של אתר זה ואתרים אחרים. <a%s>למד כיצד לעדכן את הדפדפן שלך</a>';
    t.nb = 'Nettleseren din (%s) er <b>utdatert</b>. Den har kjente <b>sikkerhetshull</b> og <b>kan ikke vise alle funksjonene</b> på denne og andre websider. <a%s>Lær hvordan du kan oppdatere din nettleser</a>';
    t["zh-tw"] = '您的瀏覽器(%s) 需要更新。該瀏覽器有諸多安全漏洞，無法顯示本網站的所有功能。 <a%s>瞭解如何更新瀏覽器</a>';
    t.zh = '<b>您的网页浏览器 (%s) 已过期</b>。更新您的浏览器，以提高安全性和舒适性，并获得访问本网站的最佳体验。<a%s>更新浏览器</a> <a%s>忽略</a>';
    t.fi = 'Selaimesi (%s) on <b>vanhentunut</b>. Siinä on tunnettuja tietoturvaongelmia eikä se välttämättä tue kaikkia ominaisuuksia tällä tai muilla sivustoilla. <a%s>Lue lisää siitä kuinka päivität selaimesi</a>.';
    t.tr = 'Tarayıcınız (%s) <b>güncel değil</b>. Eski versiyon olduğu için <b>güvenlik açıkları</b> vardır ve görmek istediğiniz bu web sitesinin ve diğer web sitelerinin <b>tüm özelliklerini hatasız bir şekilde</b> gösteremeyecektir. <a%s>Tarayıcınızı nası
l güncelleyebileceğinizi öğrenin</a>';
    t.ro = 'Browser-ul (%s) tau este <b>invechit</b>. Detine <b>probleme de securitate</b> cunoscute si poate <b>sa nu afiseze corect</b> toate elementele acestui si altor site-uri. <a%s>Invata cum sa-ti actualizezi browserul.</a>';
    t.bg = 'Вашият браузър (%s) <b>не е актуален</b>. Известно е, че има <b>пропуски в сигурността</b> и може <b>да не покаже правилно</b> този или други сайтове. <a%s>Научете как да актуализирате браузъра си</a>.';
    t.el = 'Αυτός ο ιστότοπος σας υπενθυμίζει: Ο φυλλομετρητής σας (%s) είναι <b>παρωχημένος</b>. <a%s>Ενημερώστε το πρόγραμμα περιήγησής σας</a> για μεγαλύτερη ασφάλεια και άνεση σε αυτήν την ιστοσελίδα.';
    t.ar = 'متصفحك (%s) <b>منتهى الصلاحيه</b>. ويوجد به <b>ثغرات امنية</b> معروفة وقد <b>لا يُشغل كثير من الميزات</b> المتعلقه بهذه الموقع. <a%s>أضغط هنا</a>لتعرف كيف تقوم بتحديث متصفحك';
    t.sr = 'Vaš pretraživač (%s) je <b>zastareo</b>. Ima poznate <b>sigurnosne probleme</b> i najverovatnije <b>neće prikazati sve funkcionalnisti</b> ovog i drugih sajtova. <a%s>Nauči više o nadogradnji svog pretraživača</a>';
    t.la = 'Mēs vēlamies Jums atgādināt: Jūsu pārlūkprogramma (%s) ir novecojusi. <a>Atjauniniet savu pārlūkprogrammu</a>, lai uzlabotu drošību, ātrumu un pārlūkošanas ērtības šajā un citās lapās.';
    t.ga = 'Tá an líonléitheoir agat (%s) <b>as dáta</b>. Tá <b>laigeachtaí slándála</b> a bhfuil ar eolas ann agus b\'fhéidir <b>nach taispeánfaidh sé gach gné</b> den suíomh gréasáin seo ná cinn eile. <a%s>Foghlaim conas do líonléitheoir a nuashonrú</a>';
    t.lv = 'Jūsu pārlūkprogramma (%s) ir <b>novecojusi</b>.  Tai ir zināmas <b>drošības problēmas</b>, un tā var attēlot šo un citas  tīmekļa lapas <b>nekorekti</b>. <a%s>Uzzini, kā atjaunot savu pārlūkprogrammu</a>';
    t.no = 'Dette nettstedet ønsker å minne deg på: Din nettleser (%s) er <b>utdatert</b>. <a%s>Oppdater nettleseren din </a> for mer sikkerhet, komfort og den beste opplevelsen på denne siden.';
    t.th = 'เว็บไซต์นี้อยากจะเตือนคุณ: เบราว์เซอร์ (%s) ของคุณนั้น <b>ล้าสมัยแล้ว</b> <a%s>ปรับปรุงเบราว์เซอร์ของคุณ</a> เพื่อเพิ่ม ความปลอดภัย ความสะดวกสบายและประสบการณ์ที่ดีที่สุดในเว็บไซต์นี้';
    t.hi = 'यह वेबसाइट आपको याद दिलाना चाहती हैं: आपका ब्राउज़र (%s) <b> आउट ऑफ़ डेट </ b> हैं। <a%s> और अधिक सुरक्षा, आराम और इस साइट पर सबसे अच्छा अनुभव करने लिए आपके ब्राउज़र को अपडेट करें</a>।';
    t.sk = 'Chceli by sme Vám pripomenúť: Váš prehliadač (%s) je <b>zastaralý</b>. <a%s>Aktualizujte si ho</a> pre viac bezpečnosti, pohodlia a pre ten najlepší zážitok na tejto stránke.';
    t.vi = 'Website này xin nhắc bạn rằng: Trình duyệt (%s) của bạn hiện đã <b>lỗi thời</b>. <a%s>Hãy cập nhật trình duyệt của bạn</a> để tăng thêm tính bảo mật, sự tiện lợi và trải nghiệm tuyệt nhất trên trang web này.';

    var text = t[ll] || t.en;
    text = busprintf(text, bb.t, ' class="update arrow" href="//www.google.com/chrome" target="_blank"' ,' style="display:none"');
    var div = document.createElement('div');
    div.className = "browsercheck container";
    var _prtg = window._PRTG || undefined;
    div.innerHTML = '<div class="browsercheck_inner">' +
                        ( _prtg != undefined  
                          ? '<button title="'+_Prtg.Lang.Dialogs.strings.close+'" class="browsercheck-ignore ignore glyph-cancel-1"></button>'
                          : '<button class="browsercheck-ignore ignore glyph-cancel-1"></button>'
                        ) +
                        '<p>' + text + '</p>' +
                    '</div>';
    document.body.insertBefore(div, document.getElementById("container"));
    document.getElementsByClassName("browsercheck-ignore")[0].onclick = function(){
      !!localStorage && localStorage.setItem("browsercheck", false);
      div.style ="display:none"
    };
    !!localStorage && localStorage.setItem("browsercheck", JSON.stringify({l:ll,b:bb}));
  }

  function busprintf() {
    var args = arguments;
    var data = args[0];
    for (var k = 1; k <args.length; ++k)
      data = data.replace(/%s/, args[k]);
    return data;
  }

  function getURLParameter(name) {
    return decodeURIComponent((new RegExp('[?|&]' + name + '=' + '([^&;]+?)(&|#|;|$)').exec(location.search) || [null, ''])[1].replace(/\+/g, '%20')) || null;
  }

  //test add browsercheck = {"l":"en","b":{"n":"c","v":10,"t":"Chrome 10","donotnotify":false,"mobile":false}} to localStrorage
  //or add browser=ABCD.12 to the URL
  var test = getURLParameter('browser');
  if(!!test)
    localStorage.removeItem("browsercheck")
  $buo({mobile: false}, test);

})(window, document);

function byId(id) {
  return document.getElementById(id);
}

if (sessionStorage.getItem('sessionExpired')) {
  document.getElementsByClassName("errormessage")[0].innerHTML = 'Your session has expired.';
  sessionStorage.removeItem('sessionExpired');
}

if(!document.addEventListener) {
    byId("unsupportedbrowser").style.display = "block";
} else {
  document.addEventListener("DOMContentLoaded", function(event) {
    var mobile = false;
    var unofficiallysupported=false;

    byId("loginusername").addEventListener('keydown',function(event){
        byId("loginpassword").type = "password";
    },{once:true})

    if (window.isunsupportedbrowser) {
      byId("unsupportedbrowser").style.display="block";
      return;
    }
    if (window.location.host=="localhost") {
      byId("dontuselocalhost").style.display="block";
    }
  });
}
</script>
<!--
//        You can use this file to modify the appearance of the PRTG web interface
//        as described in https://kb.paessler.com/en/topic/33
//        
//        Please note that you are using an unsupported and deprecated feature. 
//        Your changes will be broken or removed with future PRTG updates.
//        
//        If you modify this file, PLEASE LET US KNOW what you're changing and why!
//        Just drop an email to support@paessler.com and help us understand your 
//        needs. Thank you!       
-->

</body>
</html>
Get-Device : For security reasons DTD is prohibited in this XML document. To enable DTD processing set the DtdProcessing property on XmlReaderSettings to Parse and pass the settings into XmlReader.Create method.
At line:1 char:1
+ Get-Device -Verbose
+ ~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [Get-Device], XmlException
    + FullyQualifiedErrorId : System.Xml.XmlException,PrtgAPI.PowerShell.Cmdlets.GetDevice
lordmilko commented 3 years ago

It seems your request to Get-Device has returned a web page from PRTG, rather than an XML response.

If you do

Set-PrtgClient -LogLevel All

Get-Device -Verbose

and then scroll back up, you'll see the API request that was executed for the request, which should be something like

http://prtg.example.com/api/table.xml?content=devices&columns=objid,name,location,host,group,probe,favorite,conditi
on,upsens,downsens,downacksens,partialdownsens,warnsens,pausedsens,unusualsens,undefinedsens,totalsens,schedule,basetyp
e,baselink,notifiesx,intervalx,access,dependency,position,status,comments,priority,message,parentid,tags,type,active&co
unt=*&username=prtgadmin&passhash=12345678

If you then copy and paste that address into your web browser, it should execute the same API request, giving you an XML document, not a web page. Are you able to confirm it said it was making a request similar to the above as well as what happens when you and copy and paste this in your browser?

KoalaScripts commented 3 years ago

Hello @lordmilko

That got me to the path to finding the issue . It is calling following : (Hid the pwd hash and our site ) 

https://www.PRTGSite.us.com//api/table.xml?content=devices&columns=objid,name,location,host,group,probe,favorite,condition,upsens,downsens,downacksens,partialdownsens,warnsens,pausedsens,unusualsens,undefinedsens,totalsens,schedule,basetype,baselink,notifiesx,intervalx,access,dependency,position,status,comments,priority,message,parentid,tags,type,active&count=*&username=4cffefa6-fa54-4c8e-9f4d-86c29b5ef31a&passhash=----------

at the end of the PRTG site there are 2 "/" I setup my initial connection with Connect-PrtgServer "https://www.PRTGSite.us.com/" -Credential $pscredential -PassHash Once this / at the end of the site got removed its all working!

Thank you very much for your assistance !

Ps: might be an option to catch this somewhere?

lordmilko commented 3 years ago

Thanks @KoalaScripts!

I have actually had a similar request for this in #206

This feature has been implemented and will be present in PrtgAPI 0.10 when it is released (no ETA)

Regards, lordmilko

lordmilko commented 3 years ago

Hi @KoalaScripts,

Please be advised PrtgAPI 0.9.15 has now been released which includes a fix for this issue

To update PrtgAPI, please run Update-Module PrtgAPI and reopen PowerShell

Regards, lordmilko