diff --git a/src/seeder/db.h b/src/seeder/db.h
--- a/src/seeder/db.h
+++ b/src/seeder/db.h
@@ -80,6 +80,7 @@
 private:
     CService ip;
     uint64_t services;
+    int64_t timeFirstFound;
     int64_t lastTry;
     int64_t ourLastTry;
     int64_t ourLastSuccess;
@@ -95,10 +96,20 @@
     int success;
     std::string clientSubVersion;
 
+protected:
+    bool hasBeenTriedBefore() const { return total > 0; }
+    int64_t timeSinceFoundOrLastSuccess() {
+        int64_t now = time(nullptr);
+        int64_t lastSuccessOrFirstFoundTime =
+            success > 0 ? ourLastSuccess : timeFirstFound;
+        return now - lastSuccessOrFirstFoundTime;
+    }
+
 public:
     CAddrInfo()
-        : services(0), lastTry(0), ourLastTry(0), ourLastSuccess(0),
-          ignoreTill(0), clientVersion(0), blocks(0), total(0), success(0) {}
+        : services(0), timeFirstFound(time(nullptr)), lastTry(0), ourLastTry(0),
+          ourLastSuccess(0), ignoreTill(0), clientVersion(0), blocks(0),
+          total(0), success(0) {}
 
     CAddrReport GetReport() const {
         CAddrReport ret;
@@ -221,6 +232,7 @@
             return;
         }
 
+        READWRITE(timeFirstFound);
         READWRITE(ourLastTry);
         READWRITE(ignoreTill);
         READWRITE(stat2H);
@@ -260,6 +272,7 @@
 struct CServiceResult {
     CService service;
     bool fGood;
+    bool fReliable;
     int nBanTime;
     int nHeight;
     int nClientV;
diff --git a/src/seeder/db.cpp b/src/seeder/db.cpp
--- a/src/seeder/db.cpp
+++ b/src/seeder/db.cpp
@@ -69,6 +69,9 @@
         } else {
             ip.service = idToInfo[ret].ip;
             ip.ourLastSuccess = idToInfo[ret].ourLastSuccess;
+            ip.fReliable =
+                idToInfo[ret].IsGood() && idToInfo[ret].hasBeenTriedBefore() &&
+                idToInfo[ret].timeSinceFoundOrLastSuccess() > 2 * 86400;
             break;
         }
     } while (1);
diff --git a/src/seeder/main.cpp b/src/seeder/main.cpp
--- a/src/seeder/main.cpp
+++ b/src/seeder/main.cpp
@@ -204,6 +204,9 @@
                 // tfm::format(std::cout, "%s: %s!!!\n", cip.ToString().c_str(),
                 // ret ? "GOOD" : "BAD");
                 res.fGood = ret;
+                if (!res.fGood && !res.fReliable) {
+                    res.nBanTime = 100000;
+                }
             } catch (std::ios_base::failure &e) {
                 res.nBanTime = 0;
                 res.fGood = false;