diff -Naur ppp-2.4.5-pre1/pppd/fsm.c src/pppd/fsm.c
--- ppp-2.4.5-pre1/pppd/fsm.c	2008-10-09 03:08:36.000000000 +0200
+++ src/pppd/fsm.c	2008-12-22 21:36:32.000000000 +0100
@@ -253,6 +253,7 @@
 {
     f->term_reason = reason;
     f->term_reason_len = (reason == NULL? 0: strlen(reason));
+
     switch( f->state ){
     case STARTING:
 	f->state = INITIAL;
diff -Naur ppp-2.4.5-pre1/pppd/lcp.c src/pppd/lcp.c
--- ppp-2.4.5-pre1/pppd/lcp.c	2008-10-09 03:08:36.000000000 +0200
+++ src/pppd/lcp.c	2008-12-22 21:55:51.000000000 +0100
@@ -368,6 +368,31 @@
     ao->neg_endpoint = 1;
 }
 
+/*
+ * dump lcp state
+ */
+static void dump_lcp_state(const char *state, const char *reason)
+{
+    if (lcp_state) {
+	    FILE *f;
+
+	    f = fopen(lcp_state, "w+");
+	    if (f) {
+		    fputs(state, f);
+		    fclose(f);
+	    }
+    }
+
+    if (lcp_reason && reason) {
+	    FILE *f;
+
+	    f = fopen(lcp_reason, "w+");
+	    if (f) {
+		    fputs(reason, f);
+		    fclose(f);
+	    }
+    }
+}
 
 /*
  * lcp_open - LCP is allowed to come up.
@@ -379,6 +404,8 @@
     fsm *f = &lcp_fsm[unit];
     lcp_options *wo = &lcp_wantoptions[unit];
 
+    dump_lcp_state("opening", NULL);
+
     f->flags &= ~(OPT_PASSIVE | OPT_SILENT);
     if (wo->passive)
 	f->flags |= OPT_PASSIVE;
@@ -398,6 +425,9 @@
 {
     fsm *f = &lcp_fsm[unit];
 
+    /* don't clear last reason if empty given */
+    dump_lcp_state("closed", *reason ? reason : NULL);
+
     if (phase != PHASE_DEAD && phase != PHASE_MASTER)
 	new_phase(PHASE_TERMINATE);
     if (f->state == STOPPED && f->flags & (OPT_PASSIVE|OPT_SILENT)) {
@@ -1890,6 +1920,8 @@
     lcp_options *ao = &lcp_allowoptions[f->unit];
     int mtu, mru;
 
+    dump_lcp_state("up", NULL);
+
     if (!go->neg_magicnumber)
 	go->magicnumber = 0;
     if (!ho->neg_magicnumber)
@@ -1937,6 +1969,8 @@
 {
     lcp_options *go = &lcp_gotoptions[f->unit];
 
+    dump_lcp_state("down", NULL);
+
     lcp_echo_lowerdown(f->unit);
 
     link_down(f->unit);
diff -Naur ppp-2.4.5-pre1/pppd/options.c src/pppd/options.c
--- ppp-2.4.5-pre1/pppd/options.c	2008-10-09 03:08:36.000000000 +0200
+++ src/pppd/options.c	2008-12-22 21:44:26.000000000 +0100
@@ -119,6 +119,8 @@
 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 */
+char	*lcp_state = NULL;	/* LCP state dump */
+char	*lcp_reason = NULL;	/* LCP last close reason */
 
 #ifdef MAXOCTETS
 unsigned int  maxoctets = 0;    /* default - no limit */
@@ -321,6 +323,12 @@
       "Check for traffic limit every N seconds", OPT_PRIO | OPT_LLIMIT | 1 },
 #endif
 
+    { "lcp_state", o_string, &lcp_state,
+      "Store lcp state to file", OPT_PRIO },
+
+    { "lcp_reason", o_string, &lcp_reason,
+      "Store lcp last close reason", OPT_PRIO },
+
     { NULL }
 };
 
--- ppp-2.4.5-pre1/pppd/pppd.h	2008-10-09 03:08:36.000000000 +0200
+++ src/pppd/pppd.h	2008-12-22 22:08:28.000000000 +0100
@@ -319,6 +319,8 @@
 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 char	*lcp_state;	/* LCP state dump */
+extern char	*lcp_reason;	/* LCP last close reason */
 
 #ifdef MAXOCTETS
 extern unsigned int maxoctets;	     /* Maximum octetes per session (in bytes) */