diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -553,6 +553,7 @@
 	consensus/activation.cpp
 	consensus/tx_verify.cpp
 	dbwrapper.cpp
+	dnsseeds.cpp
 	flatfile.cpp
 	httprpc.cpp
 	httpserver.cpp
diff --git a/src/chainparams.h b/src/chainparams.h
--- a/src/chainparams.h
+++ b/src/chainparams.h
@@ -85,7 +85,6 @@
     /** Return the BIP70 network string (main, test or regtest) */
     std::string NetworkIDString() const { return strNetworkID; }
     /** Return the list of hostnames to look up for DNS seeds */
-    const std::vector<std::string> &DNSSeeds() const { return vSeeds; }
     const std::vector<uint8_t> &Base58Prefix(Base58Type type) const {
         return base58Prefixes[type];
     }
@@ -116,6 +115,9 @@
     bool m_is_mockable_chain;
     CCheckpointData checkpointData;
     ChainTxData chainTxData;
+
+    friend const std::vector<std::string>
+    GetRandomizedDNSSeeds(const CChainParams &params);
 };
 
 /**
diff --git a/src/dnsseeds.h b/src/dnsseeds.h
new file mode 100644
--- /dev/null
+++ b/src/dnsseeds.h
@@ -0,0 +1,17 @@
+// Copyright (c) 2021 The Bitcoin developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef BITCOIN_DNSSEEDS_H
+#define BITCOIN_DNSSEEDS_H
+
+#include <chainparams.h>
+
+#include <string>
+#include <vector>
+
+/** Return the list of hostnames to look up for DNS seeds */
+const std::vector<std::string>
+GetRandomizedDNSSeeds(const CChainParams &params);
+
+#endif // BITCOIN_DNSSEEDS_H
diff --git a/src/dnsseeds.cpp b/src/dnsseeds.cpp
new file mode 100644
--- /dev/null
+++ b/src/dnsseeds.cpp
@@ -0,0 +1,22 @@
+// Copyright (c) 2021 The Bitcoin developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include <dnsseeds.h>
+
+#include <random.h>
+#include <util/system.h>
+
+const std::vector<std::string>
+GetRandomizedDNSSeeds(const CChainParams &params) {
+    FastRandomContext rng;
+    std::vector<std::string> seeds;
+    if (gArgs.IsArgSet("-overridednsseed")) {
+        seeds = {gArgs.GetArg("-overridednsseed", "")};
+    } else {
+        seeds = params.vSeeds;
+    }
+
+    Shuffle(seeds.begin(), seeds.end(), rng);
+    return seeds;
+}
diff --git a/src/init.cpp b/src/init.cpp
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -665,6 +665,10 @@
             "Always query for peer addresses via DNS lookup (default: %d)",
             DEFAULT_FORCEDNSSEED),
         ArgsManager::ALLOW_ANY, OptionsCategory::CONNECTION);
+    argsman.AddArg("-overridednsseed",
+                   "If set, only use the specified DNS seed when "
+                   "querying for peer addresses via DNS lookup.",
+                   ArgsManager::ALLOW_ANY, OptionsCategory::CONNECTION);
     argsman.AddArg(
         "-listen",
         "Accept connections from outside (default: 1 if no -proxy or -connect)",
diff --git a/src/net.cpp b/src/net.cpp
--- a/src/net.cpp
+++ b/src/net.cpp
@@ -14,6 +14,7 @@
 #include <config.h>
 #include <consensus/consensus.h>
 #include <crypto/sha256.h>
+#include <dnsseeds.h>
 #include <netbase.h>
 #include <node/ui_interface.h>
 #include <protocol.h>
@@ -1725,8 +1726,8 @@
 
 void CConnman::ThreadDNSAddressSeed() {
     FastRandomContext rng;
-    std::vector<std::string> seeds = config->GetChainParams().DNSSeeds();
-    Shuffle(seeds.begin(), seeds.end(), rng);
+    std::vector<std::string> seeds =
+        GetRandomizedDNSSeeds(config->GetChainParams());
     // Number of seeds left before testing if we have enough connections
     int seeds_right_now = 0;
     int found = 0;
diff --git a/src/seeder/main.cpp b/src/seeder/main.cpp
--- a/src/seeder/main.cpp
+++ b/src/seeder/main.cpp
@@ -4,6 +4,7 @@
 
 #include <chainparams.h>
 #include <clientversion.h>
+#include <dnsseeds.h>
 #include <fs.h>
 #include <logging.h>
 #include <protocol.h>
@@ -146,6 +147,10 @@
                        ArgsManager::ALLOW_ANY, OptionsCategory::CONNECTION);
         argsman.AddArg("-onion=<ip:port>", "Tor proxy IP/Port",
                        ArgsManager::ALLOW_ANY, OptionsCategory::CONNECTION);
+        argsman.AddArg("-overridednsseed",
+                       "If set, only use the specified DNS seed when "
+                       "querying for peer addresses via DNS lookup.",
+                       ArgsManager::ALLOW_ANY, OptionsCategory::CONNECTION);
         argsman.AddArg("-proxyipv4=<ip:port>", "IPV4 SOCKS5 proxy IP/Port",
                        ArgsManager::ALLOW_ANY, OptionsCategory::CONNECTION);
         argsman.AddArg("-proxyipv6=<ip:port>", "IPV6 SOCKS5 proxy IP/Port",
@@ -458,7 +463,7 @@
 
 extern "C" void *ThreadSeeder(void *) {
     do {
-        for (const std::string &seed : Params().DNSSeeds()) {
+        for (const std::string &seed : GetRandomizedDNSSeeds(Params())) {
             std::vector<CNetAddr> ips;
             LookupHost(seed.c_str(), ips, MAX_HOSTS_PER_SEED, true);
             for (auto &ip : ips) {
diff --git a/src/test/CMakeLists.txt b/src/test/CMakeLists.txt
--- a/src/test/CMakeLists.txt
+++ b/src/test/CMakeLists.txt
@@ -196,6 +196,7 @@
 		script_standard_tests.cpp
 		script_tests.cpp
 		scriptnum_tests.cpp
+		dnsseeds_tests.cpp
 		serialize_tests.cpp
 		settings_tests.cpp
 		sigcache_tests.cpp
diff --git a/src/test/dnsseeds_tests.cpp b/src/test/dnsseeds_tests.cpp
new file mode 100644
--- /dev/null
+++ b/src/test/dnsseeds_tests.cpp
@@ -0,0 +1,24 @@
+// Copyright (c) 2020-2021 The Bitcoin developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include <dnsseeds.h>
+
+#include <test/util/setup_common.h>
+
+#include <boost/test/unit_test.hpp>
+
+BOOST_FIXTURE_TEST_SUITE(dnsseeds_tests, TestingSetup)
+
+BOOST_AUTO_TEST_CASE(override_dns_seed) {
+    // No override should always provide some DNS seeds
+    const auto params = CreateChainParams(CBaseChainParams::MAIN);
+    BOOST_CHECK(GetRandomizedDNSSeeds(*params).size() > 0);
+
+    // Overriding should only return that DNS seed
+    gArgs.ForceSetArg("-overridednsseed", "localhost");
+    BOOST_CHECK(GetRandomizedDNSSeeds(*params) ==
+                std::vector<std::string>{{"localhost"}});
+}
+
+BOOST_AUTO_TEST_SUITE_END()