diff --git a/source/de/anomic/plasma/plasmaSwitchboard.java b/source/de/anomic/plasma/plasmaSwitchboard.java
index 3f8a3e047..0217cf71f 100644
--- a/source/de/anomic/plasma/plasmaSwitchboard.java
+++ b/source/de/anomic/plasma/plasmaSwitchboard.java
@@ -255,7 +255,6 @@ public final class plasmaSwitchboard extends serverAbstractSwitch implements ser
     public  int                         totalPPM = 0;
     public  double                      totalQPM = 0d;
     public  TreeMap                     clusterhashes; // map of peerhash(String)/alternative-local-address as ip:port or only ip (String) or null if address in seed should be used
-    public  long                        maxLastSeen = 604800000; // maximum time (in ms) a peer may not have been seen before it is removed from passive and potential dbs
     
     /*
      * Remote Proxy configuration
@@ -1930,7 +1929,8 @@ public final class plasmaSwitchboard extends serverAbstractSwitch implements ser
             } catch (IOException e) {}
             
             // clean up seed-dbs
-            if(!getConfigBool("never_delete_old_seeds",false)) {
+            if(getConfigBool("routing.deleteOldSeeds.permission",true)) {
+            	final long deleteOldSeedsTime = getConfigLong("routing.deleteOldSeeds.time",7)*24*3600000;
                 Enumeration e = yacyCore.seedDB.seedsSortedDisconnected(true,yacySeed.LASTSEEN);
                 yacySeed seed = null;
                 ArrayList deleteQueue = new ArrayList();
@@ -1940,7 +1940,7 @@ public final class plasmaSwitchboard extends serverAbstractSwitch implements ser
                 	seed = (yacySeed)e.nextElement();
                 	if(seed != null) {
                 		//list is sorted -> break when peers are too young to delete
-                		if(seed.getLastSeenUTC() > (System.currentTimeMillis()-maxLastSeen))
+                		if(seed.getLastSeenUTC() > (System.currentTimeMillis()-deleteOldSeedsTime))
                 				break;
                 		deleteQueue.add(seed.hash);
                 	}
@@ -1954,7 +1954,7 @@ public final class plasmaSwitchboard extends serverAbstractSwitch implements ser
                 	seed = (yacySeed)e.nextElement();
                 	if(seed != null) {
                 		//list is sorted -> break when peers are too young to delete
-                		if(seed.getLastSeenUTC() > (System.currentTimeMillis()-maxLastSeen))
+                		if(seed.getLastSeenUTC() > (System.currentTimeMillis()-deleteOldSeedsTime))
                 				break;
                 		deleteQueue.add(seed.hash);
                 	}
diff --git a/yacy.init b/yacy.init
index d28491f4b..6a88b0806 100644
--- a/yacy.init
+++ b/yacy.init
@@ -935,5 +935,9 @@ httpd.robots.txt = locked,dirs
 # class to use for parsing wikicode
 wikiParser.class = de.anomic.data.wikiCode
 
-# if true the passive and potential Seed-dbs will never be cleaned from old (lastseen > 7 days) peers
-never_delete_old_seeds = false
\ No newline at end of file
+# settings for automatic deletion of old entries in passive and potential seed-db
+# time means max time (in days) a peer may not have been seen before it is deleted
+routing.deleteOldSeeds.permission = true
+routing.deleteOldSeeds.permission__pro = false
+routing.deleteOldSeeds.time = 7
+routing.deleteOldSeeds.time__pro = 30
\ No newline at end of file