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diff -up bind-9.9.4/bin/named/interfacemgr.c.rh1215687-limits bind-9.9.4/bin/named/interfacemgr.c
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--- bind-9.9.4/bin/named/interfacemgr.c.rh1215687-limits	2015-05-20 16:08:21.286007013 +0200
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+++ bind-9.9.4/bin/named/interfacemgr.c	2015-05-20 16:21:49.227001713 +0200
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@@ -275,7 +275,7 @@ ns_interface_listenudp(ns_interface_t *i
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 		result = dns_dispatch_getudp_dup(ifp->mgr->dispatchmgr,
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 						 ns_g_socketmgr,
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 						 ns_g_taskmgr, &ifp->addr,
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-						 4096, 1000, 32768, 8219, 8237,
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+						 4096, 32768, 32768, 8219, 8237,
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 						 attrs, attrmask,
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 						 &ifp->udpdispatch[disp],
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 						 disp == 0
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diff -up bind-9.9.4/bin/named/server.c.rh1215687-limits bind-9.9.4/bin/named/server.c
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--- bind-9.9.4/bin/named/server.c.rh1215687-limits	2015-05-20 16:08:21.272006979 +0200
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+++ bind-9.9.4/bin/named/server.c	2015-05-20 16:08:21.288007018 +0200
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@@ -992,7 +992,7 @@ get_view_querysource_dispatch(const cfg_
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 	}
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 	if (isc_sockaddr_getport(&sa) == 0) {
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 		attrs |= DNS_DISPATCHATTR_EXCLUSIVE;
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-		maxdispatchbuffers = 4096;
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+		maxdispatchbuffers = 32768;
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 	} else {
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 		INSIST(obj != NULL);
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 		if (is_firstview) {
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@@ -1001,7 +1001,7 @@ get_view_querysource_dispatch(const cfg_
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 				    "suppresses port randomization and can be "
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 				    "insecure.");
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 		}
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-		maxdispatchbuffers = 1000;
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+		maxdispatchbuffers = 32768;
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 	}
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 	attrmask = 0;
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@@ -6491,7 +6491,7 @@ ns_add_reserved_dispatch(ns_server_t *se
900526
 
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 	result = dns_dispatch_getudp(ns_g_dispatchmgr, ns_g_socketmgr,
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 				     ns_g_taskmgr, &dispatch->addr, 4096,
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-				     1000, 32768, 16411, 16433,
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+				     32768, 32768, 16411, 16433,
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 				     attrs, attrmask, &dispatch->dispatch);
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 	if (result != ISC_R_SUCCESS)
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 		goto cleanup;
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diff -up bind-9.9.4/lib/dns/dispatch.c.rh1215687-limits bind-9.9.4/lib/dns/dispatch.c
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diff -up bind-9.9.4/lib/dns/request.c.rh1215687-limits bind-9.9.4/lib/dns/request.c
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--- bind-9.9.4/lib/dns/request.c.rh1215687-limits	2013-09-05 07:09:08.000000000 +0200
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+++ bind-9.9.4/lib/dns/request.c	2015-05-20 16:08:21.286007013 +0200
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@@ -601,7 +601,7 @@ find_udp_dispatch(dns_requestmgr_t *requ
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 				    requestmgr->socketmgr,
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 				    requestmgr->taskmgr,
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 				    srcaddr, 4096,
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-				    1000, 32768, 16411, 16433,
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+				    32768, 32768, 16411, 16433,
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 				    attrs, attrmask,
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 				    dispatchp));
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 }
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diff -up bind-9.9.4/lib/dns/resolver.c.rh1215687-limits bind-9.9.4/lib/dns/resolver.c
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--- bind-9.9.4/lib/dns/resolver.c.rh1215687-limits	2015-05-20 16:08:21.277006991 +0200
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+++ bind-9.9.4/lib/dns/resolver.c	2015-05-20 16:08:21.285007010 +0200
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@@ -1489,7 +1489,7 @@ fctx_query(fetchctx_t *fctx, dns_adbaddr
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 			result = dns_dispatch_getudp(res->dispatchmgr,
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 						     res->socketmgr,
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 						     res->taskmgr, &addr,
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-						     4096, 1000, 32768, 16411,
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+						     4096, 20000, 32768, 16411,
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 						     16433, attrs, attrmask,
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 						     &query->dispatch);
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 			if (result != ISC_R_SUCCESS)