diff --git a/package/network/services/ppp/patches/511-syncppp.patch b/package/network/services/ppp/patches/511-syncppp.patch
index 8b8b6cce6a..455ae1fd22 100644
--- a/package/network/services/ppp/patches/511-syncppp.patch
+++ b/package/network/services/ppp/patches/511-syncppp.patch
@@ -9,22 +9,21 @@
  #ifdef CHAPMS
  #include "chap_ms.h"
  #define MDTYPE_ALL (MDTYPE_MICROSOFT_V2 | MDTYPE_MICROSOFT | MDTYPE_MD5)
-@@ -492,6 +494,19 @@ chap_respond(struct chap_client_state *c
+@@ -481,6 +483,18 @@ chap_respond(struct chap_client_state *cs, int id,
  	p[2] = len >> 8;
  	p[3] = len;
  
-+    if (npppd > 1) {
-+        if (syncppp(npppd) < 0) {
-+            error("syncppp sync fail");
-+            sem_unlink(SEM_COUNT_NAME);
-+            sem_unlink(SEM_BLOCK_NAME);
-+        } else {
-+            info("syncppp sync succeeded");
-+        }   
-+    } else {
-+        info("syncppp not active");
-+    }
-+
++	if (npppd > 1) {
++		if (syncppp(npppd) < 0) {
++			error("syncppp sync fail");
++			sem_unlink(SEM_COUNT_NAME);
++			sem_unlink(SEM_BLOCK_NAME);
++		} else {
++			info("syncppp sync succeeded");
++		}
++	} else {
++		info("syncppp not active");
++	}
 +
  	output(0, response, PPP_HDRLEN + len);
  }
@@ -55,39 +54,38 @@
  # CC = gcc
  #
  COPTS = -O2 -pipe -Wall -g
--LIBS =
+-LIBS = -lrt
 +LIBS = -lpthread
  
  # Uncomment the next line to include support for Microsoft's
  # MS-CHAP authentication protocol.  Also, edit plugins/radius/Makefile.linux.
 --- a/pppd/options.c
 +++ b/pppd/options.c
-@@ -128,6 +128,7 @@ bool	dump_options;		/* print out option
+@@ -123,6 +123,7 @@ bool	dump_options;		/* print out option values */
  bool	dryrun;			/* print out option values and exit */
  char	*domain;		/* domain name set by domain option */
  int	child_wait = 5;		/* # seconds to wait for children at exit */
-+int	npppd = 0;      /* synchronize between multiple pppd */
++int	npppd = 0;		/* synchronize between multiple pppd */
  struct userenv *userenv_list;	/* user environment variables */
  int	dfl_route_metric = -1;	/* metric of the default route to set over the PPP link */
  
-@@ -342,6 +343,10 @@ option_t general_options[] = {
-       "Set pathname of ipv6-down script",
-       OPT_PRIV|OPT_STATIC, NULL, MAXPATHLEN },
+@@ -312,6 +313,9 @@ option_t general_options[] = {
+       "Unset user environment variable",
+       OPT_A2PRINTER | OPT_NOPRINT, (void *)user_unsetprint },
  
 +    { "syncppp", o_int, &npppd,
 +      "sync among multiple pppd when sending chap/pap respond", OPT_PRIO },
 +
-+
- #ifdef HAVE_MULTILINK
-     { "multilink", o_bool, &multilink,
-       "Enable multilink operation", OPT_PRIO | 1 },
+     { "defaultroute-metric", o_int, &dfl_route_metric,
+       "Metric to use for the default route (Linux only; -1 for default behavior)",
+       OPT_PRIV|OPT_LLIMIT|OPT_INITONLY, NULL, 0, -1 },
 --- a/pppd/pppd.h
 +++ b/pppd/pppd.h
-@@ -343,6 +343,7 @@ extern char	*bundle_name;	/* bundle name
+@@ -341,6 +341,7 @@ extern char	*bundle_name;	/* bundle name for multilink */
  extern bool	dump_options;	/* print out option values */
  extern bool	dryrun;		/* check everything, print options, exit */
  extern int	child_wait;	/* # seconds to wait for children at end */
-+extern int npppd;  /* synchronize between multiple pppd */
++extern int	npppd;		/* synchronize between multiple pppd */
  
  #ifdef MAXOCTETS
  extern unsigned int maxoctets;	     /* Maximum octetes per session (in bytes) */
@@ -199,9 +197,8 @@
 +        }
 +    } else {
 +        info("syncppp not active");
-+    }   
++    }
 +
      output(u->us_unit, outpacket_buf, outlen + PPP_HDRLEN);
  
      TIMEOUT(upap_timeout, u, u->us_timeouttime);
-
diff --git a/package/network/services/ppp/patches/600-Revert-pppd-Use-openssl-for-the-DES-instead-of-the-l.patch b/package/network/services/ppp/patches/600-Revert-pppd-Use-openssl-for-the-DES-instead-of-the-l.patch
index 5802d6158c..49bdb28fe2 100644
--- a/package/network/services/ppp/patches/600-Revert-pppd-Use-openssl-for-the-DES-instead-of-the-l.patch
+++ b/package/network/services/ppp/patches/600-Revert-pppd-Use-openssl-for-the-DES-instead-of-the-l.patch
@@ -17,7 +17,7 @@ This reverts commit 3c7b86229f7bd2600d74db14b1fe5b3896be3875.
 +++ b/pppd/Makefile.linux
 @@ -35,10 +35,10 @@ endif
  COPTS = -O2 -pipe -Wall -g
- LIBS = -lrt
+ LIBS = -lpthread
  
 -# Uncomment the next line to include support for Microsoft's
 +# Uncomment the next 2 lines to include support for Microsoft's