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DemoResolveParallelDNSBL.cs
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using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;
namespace DnsClientX.Examples {
/// <summary>
/// Demonstrates querying multiple DNS blacklists in parallel.
/// </summary>
public static class DemoResolveParallelBlackList {
/// <summary>List of common DNSBL providers.</summary>
public static List<string> dnsBlacklist { get; } = [
"all.s5h.net",
"auth.spamrats.com",
"b.barracudacentral.org",
"bad.virusfree.cz",
"badconf.rhsbl.sorbs.net",
"bip.virusfree.cz",
"bl.0spam.org",
"bl.blocklist.de",
"bl.deadbeef.com",
"bl.mailspike.org",
"bl.nordspam.com",
"bl.spamcop.net",
"black.dnsbl.brukalai.lt",
"black.mail.abusix.zone",
"blackholes.five-ten-sg.com",
"blacklist.woody.ch",
"block.dnsbl.sorbs.net",
"bogons.cymru.com",
"cbl.abuseat.org",
"combined.abuse.ch",
"combined.mail.abusix.zone",
"combined.rbl.msrbl.net",
"db.wpbl.info",
"dbl.0spam.org",
"dbl.nordspam.com",
"dbl.spamhaus.org",
"dblack.mail.abusix.zone",
"diskhash.mail.abusix.zone",
"dnsbl.cyberlogic.net",
"dnsbl.dronebl.org",
"dnsbl.inps.de",
"dnsbl.justspam.org",
"dnsbl.sorbs.net",
"dnsbl-1.uceprotect.net",
"dnsbl-2.uceprotect.net",
"dnsbl-3.uceprotect.net",
"drone.abuse.ch",
"duinv.aupads.org",
"dul.dnsbl.sorbs.net",
"dul.ru",
"dyna.spamrats.com",
"dynamic.mail.abusix.zone",
"escalations.dnsbl.sorbs.net",
"exploit.mail.abusix.zone",
"hbl.spamhaus.org",
"hostkarma.junkemailfilter.com",
"http.dnsbl.sorbs.net",
"images.rbl.msrbl.net",
"ips.backscatterer.org",
"ix.dnsbl.manitu.net",
"key.authbl.dq.spamhaus.net",
"korea.services.net",
"misc.dnsbl.sorbs.net",
"nbl.0spam.org",
"new.spam.dnsbl.sorbs.net",
"nod.mail.abusix.zone",
"nomail.rhsbl.sorbs.net",
"noptr.spamrats.com",
"noservers.dnsbl.sorbs.net",
"ohps.dnsbl.net.au",
"old.spam.dnsbl.sorbs.net",
"omrs.dnsbl.net.au",
"orvedb.aupads.org",
"osps.dnsbl.net.au",
"osrs.dnsbl.net.au",
"owfs.dnsbl.net.au",
"owps.dnsbl.net.au",
"pbl.spamhaus.org",
"phishing.rbl.msrbl.net",
"probes.dnsbl.net.au",
"proxy.bl.gweep.ca",
"proxy.block.transip.nl",
"psbl.surriel.com",
"rbl.0spam.org",
"rbl.interserver.net",
"rbl.metunet.com",
"rdts.dnsbl.net.au",
"recent.spam.dnsbl.sorbs.net",
"relays.bl.gweep.ca",
"relays.bl.kundenserver.de",
"relays.nether.net",
"residential.block.transip.nl",
"rhsbl.sorbs.net",
"ricn.dnsbl.net.au",
"rmst.dnsbl.net.au",
"safe.dnsbl.sorbs.net",
"sbl.spamhaus.org",
"short.rbl.jp",
"shorthash.mail.abusix.zone",
"singular.ttk.pte.hu",
"smtp.dnsbl.sorbs.net",
"socks.dnsbl.sorbs.net",
"spam.abuse.ch",
"spam.dnsbl.anonmails.de",
"spam.dnsbl.sorbs.net",
"spam.rbl.msrbl.net",
"spam.spamrats.com",
"spambot.bls.digibase.ca",
"spamlist.or.kr",
"spamrbl.imp.ch",
"spamsources.fabel.dk",
"t3direct.dnsbl.net.au",
"ubl.lashback.com",
"ubl.unsubscore.com",
"virbl.bit.nl",
"virus.rbl.jp",
"virus.rbl.msrbl.net",
"web.dnsbl.sorbs.net",
"wormrbl.imp.ch",
"xbl.spamhaus.org",
"z.mailspike.net",
"zen.spamhaus.org",
"zombie.dnsbl.sorbs.net"
];
/// <summary>
/// Queries all configured DNS blacklists in parallel for a single IP address.
/// </summary>
public static async Task Example() {
var endpoint = DnsEndpoint.OpenDNS;
string ipAddress = "89.74.48.96";
// Reverse the IP address and append the DNSBL list
string reversedIp = string.Join(".", Enumerable.Reverse(ipAddress.Split('.')));
List<string> queries = new List<string>();
foreach (var dnsbl in dnsBlacklist) {
string query = $"{reversedIp}.{dnsbl}";
queries.Add(query);
}
Stopwatch stopwatch = new Stopwatch();
// Start the stopwatch before the operation
stopwatch.Start();
using (var client = new ClientX(endpoint) {
Debug = false
}) {
HelpersSpectre.AddLine("Resolve (Parallel)", $"{ipAddress} => {queries.Count} queries", DnsRecordType.A, endpoint);
var responses = await client.Resolve(queries.ToArray(), DnsRecordType.A);
stopwatch.Stop();
HelpersSpectre.AddLine($"Time to resolve {stopwatch.ElapsedMilliseconds} ms", $"{ipAddress} => {queries.Count} queries", DnsRecordType.A, endpoint);
responses.DisplayTable();
}
}
}
}