diff --git a/accel-pptpd/logs/log_file.c b/accel-pptpd/logs/log_file.c
index 7287f5b977573e34589a0230c5dffed5baec10b3..c559d4d43960f53717a0ec70e36f6f5c5577768a 100644
--- a/accel-pptpd/logs/log_file.c
+++ b/accel-pptpd/logs/log_file.c
@@ -203,6 +203,7 @@ static void send_next_chunk(void)
 		close(lf->fd);
 		lf->fd = lf->new_fd;
 		lf->new_fd = -1;
+		lf->offset = 0;
 	}
 
 	aiocb.aio_fildes = lf->fd;
@@ -335,7 +336,6 @@ static void general_reopen(void)
 		return;
 	}
 	log_file->new_fd = fd;
-	log_file->offset = 0;
 }
 
 static void free_lpd(struct log_file_pd_t *lpd)
diff --git a/accel-pptpd/ppp/lcp_opt_mru.c b/accel-pptpd/ppp/lcp_opt_mru.c
index 7ab75f9eba04213f81c50c6f70634051a750f53f..6a8c430fe5960a18f03a7ed1bba1894154467f40 100644
--- a/accel-pptpd/ppp/lcp_opt_mru.c
+++ b/accel-pptpd/ppp/lcp_opt_mru.c
@@ -2,6 +2,7 @@
 #include <string.h>
 #include <errno.h>
 #include <stdio.h>
+#include <unistd.h>
 #include <sys/socket.h>
 #include <arpa/inet.h>
 #include <sys/ioctl.h>
@@ -167,6 +168,21 @@ static void __init mru_opt_init()
 	opt = conf_get_opt("ppp", "max-mtu");
 	if (opt && atoi(opt) > 0)
 		conf_max_mtu = atoi(opt);
+	
+	if (conf_min_mtu > conf_mru) {
+		log_emerg("min-mtu cann't be greater then mtu/mru\n");
+		_exit(-1);
+	}
+
+	if (conf_min_mtu > 1500) {
+		log_emerg("min-mtu cann't be greater then 1500\n");
+		_exit(-1);
+	}
+
+	if (conf_mru > 1500 || conf_mtu > 1500) {
+		log_emerg("mtu/mru cann't be greater then 1500\n");
+		_exit(-1);
+	}
 
 	lcp_option_register(&mru_opt_hnd);
 }
diff --git a/accel-pptpd/ppp/ppp_fsm.c b/accel-pptpd/ppp/ppp_fsm.c
index 46b6215413835175882d88de0e736e2c9f4b5c4e..24e914fa5b1031fb5fac4ce9f0ca353995a7504a 100644
--- a/accel-pptpd/ppp/ppp_fsm.c
+++ b/accel-pptpd/ppp/ppp_fsm.c
@@ -11,8 +11,8 @@
 #include "memdebug.h"
 
 static int conf_max_terminate = 2;
-static int conf_max_configure = 5;
-static int conf_max_failure = 5;
+static int conf_max_configure = 10;
+static int conf_max_failure = 10;
 static int conf_timeout = 5;
 
 void send_term_req(struct ppp_fsm_t *layer);
@@ -253,6 +253,10 @@ void ppp_fsm_recv_conf_req_nak(struct ppp_fsm_t *layer)
 			break;
 		case FSM_Req_Sent:
 		case FSM_Ack_Rcvd:
+			if (++layer->conf_failure == layer->max_failure) {
+				if (layer->layer_finished) layer->layer_finished(layer);
+				return;
+			}
 			if (layer->send_conf_nak) layer->send_conf_nak(layer);
 			break;
 		case FSM_Opened:
@@ -290,7 +294,7 @@ void ppp_fsm_recv_conf_req_rej(struct ppp_fsm_t *layer)
 		case FSM_Req_Sent:
 		case FSM_Ack_Rcvd:
 			if (++layer->conf_failure == layer->max_failure) {
-				if (layer->layer_down) layer->layer_down(layer);
+				if (layer->layer_finished) layer->layer_finished(layer);
 				return;
 			}
 			if (layer->send_conf_rej) layer->send_conf_rej(layer);