diff -Nuar ppp-2.4.5/chat/chat.c ppp-2.4.5-new/chat/chat.c
--- ppp-2.4.5/chat/chat.c	2009-11-16 22:26:07.000000000 +0000
+++ ppp-2.4.5-new/chat/chat.c	2011-10-15 15:38:16.835758436 +0000
@@ -1167,7 +1167,9 @@
 
     if (timeout_next) {
 	timeout_next = 0;
+    s = clean(s, 0); /* Add by guowenxue */
 	timeout = atoi(s);
+    free(s); /* Add by guowenxue  */
 	
 	if (timeout <= 0)
 	    timeout = DEFAULT_CHAT_TIMEOUT;
diff -Nuar ppp-2.4.5/chat/Makefile.linux ppp-2.4.5-new/chat/Makefile.linux
--- ppp-2.4.5/chat/Makefile.linux	2009-11-16 22:26:07.000000000 +0000
+++ ppp-2.4.5-new/chat/Makefile.linux	2011-10-15 15:39:25.753003031 +0000
@@ -14,11 +14,12 @@
 CFLAGS=	$(COPTS) $(CDEFS)
 
 INSTALL= install
+CC ?= /opt/buildroot-2011.02/arm926t/usr/bin/arm-linux-gcc
 
 all:	chat
 
 chat:	chat.o
-	$(CC) -o chat chat.o
+	$(CC) -static -o chat chat.o
 
 chat.o:	chat.c
 	$(CC) -c $(CFLAGS) -o chat.o chat.c
diff -Nuar ppp-2.4.5/pppd/auth.c ppp-2.4.5-new/pppd/auth.c
--- ppp-2.4.5/pppd/auth.c	2009-11-16 22:26:07.000000000 +0000
+++ ppp-2.4.5-new/pppd/auth.c	2011-10-15 15:38:16.835758436 +0000
@@ -1323,7 +1323,8 @@
     int hadchap;
 
     hadchap = -1;
-    ao->neg_upap = !refuse_pap && (passwd[0] != 0 || get_pap_passwd(NULL));
+    /* Modify by guowenxue, don't set password support */
+    ao->neg_upap = !refuse_pap; // && (passwd[0] != 0 || get_pap_passwd(NULL));
     ao->neg_chap = (!refuse_chap || !refuse_mschap || !refuse_mschap_v2)
 	&& (passwd[0] != 0 ||
 	    (hadchap = have_chap_secret(user, (explicit_remote? remote_name:
diff -Nuar ppp-2.4.5/pppd/Makefile.linux ppp-2.4.5-new/pppd/Makefile.linux
--- ppp-2.4.5/pppd/Makefile.linux	2009-11-16 22:26:07.000000000 +0000
+++ ppp-2.4.5-new/pppd/Makefile.linux	2011-10-15 15:38:16.836783792 +0000
@@ -30,7 +30,7 @@
 include .depend
 endif
 
-# CC = gcc
+CC ?= /opt/buildroot-2011.02/arm926t/usr/bin/arm-linux-gcc
 #
 COPTS = -O2 -pipe -Wall -g
 LIBS =
@@ -43,12 +43,12 @@
 #MSLANMAN=y
 # Uncomment the next line to include support for MPPE.  CHAPMS (above) must
 # also be enabled.  Also, edit plugins/radius/Makefile.linux.
-MPPE=y
+#MPPE=y
 
 # Uncomment the next line to include support for PPP packet filtering.
 # This requires that the libpcap library and headers be installed
 # and that the kernel driver support PPP packet filtering.
-FILTER=y
+#FILTER=y
 
 # Uncomment the next line to enable multilink PPP (enabled by default)
 # Linux distributions: Please leave multilink ENABLED in your builds
@@ -65,7 +65,7 @@
 #HAVE_INET6=y
 
 # Enable plugins
-PLUGIN=y
+#PLUGIN=y
 
 # Enable Microsoft proprietary Callback Control Protocol
 #CBCP=y