diff -ru snort-2.8.4.rc1/configure.in snort-2.8.4.rc1_gentoo/configure.in
--- snort-2.8.4.rc1/configure.in	2009-04-06 08:54:54.000000000 -0400
+++ snort-2.8.4.rc1_gentoo/configure.in	2009-04-06 09:08:37.000000000 -0400
@@ -1214,19 +1214,19 @@
          else
             libnet_dir="/usr/include /usr/local/include /sw/include"
         fi
-        AC_MSG_CHECKING("for libnet.h version 1.0.x")
+        AC_MSG_CHECKING("for libnet-1.0.h version 1.0.x")
         for i in $libnet_dir; do
-            if test -r "$i/libnet.h"; then
+            if test -r "$i/libnet-1.0.h"; then
                 LIBNET_INC_DIR="$i"
             fi
         done
 
         if test "$LIBNET_INC_DIR" != ""; then
-            if eval "grep LIBNET_VERSION $LIBNET_INC_DIR/libnet.h | grep -v 1.0 >/dev/null"; then
-                FAIL_MESSAGE("libnet 1.0.x (libnet.h)", $LIBNET_INC_DIR)
+            if eval "grep LIBNET_VERSION $LIBNET_INC_DIR/libnet-1.0.h | grep -v 1.0 >/dev/null"; then
+                FAIL_MESSAGE("libnet 1.0.x (libnet-1.0.h)", $LIBNET_INC_DIR)
             fi
-            CFLAGS="${CFLAGS} `libnet-config --defines` `libnet-config --cflags`"
-            LIBS="${LIBS} `libnet-config --libs`"
+            CFLAGS="${CFLAGS} `libnet-1.0-config --defines` `libnet-1.0-config --cflags`"
+            LIBS="${LIBS} `libnet-1.0-config --libs`"
             CPPFLAGS="${CPPFLAGS} -I${LIBNET_INC_DIR}"
             AC_MSG_RESULT($i)
         else
@@ -1248,8 +1248,8 @@
 [  --enable-flexresp        Flexible Responses on hostile connection attempts],
        enable_flexresp="$enableval", enable_flexresp="no")
 if test "x$enable_flexresp" = "xyes"; then
-    CPPFLAGS="${CPPFLAGS} -DENABLE_RESPONSE `libnet-config --defines --cflags`"
-    LDFLAGS="${LDFLAGS} `libnet-config --libs`"
+    CPPFLAGS="${CPPFLAGS} -DENABLE_RESPONSE `libnet-1.0-config --defines --cflags`"
+    LDFLAGS="${LDFLAGS} `libnet-1.0-config --libs`"
 fi
                 
 if test "x$enable_flexresp" != "xno" -a "x$enable_flexresp" = "xyes"; then
@@ -1259,21 +1259,21 @@
         exit
     fi
 
-    if test `libnet-config --cflags | wc -c` = "1"; then
+    if test `libnet-1.0-config --cflags | wc -c` = "1"; then
         CPPFLAGS="${CPPFLAGS} -I/usr/local/include -I/sw/include"
         LIBNET_CONFIG_BROKEN_CFLAGS="yes"
     fi
 
-    if test `libnet-config --libs | wc -c` = "1"; then
-        AC_MSG_WARN(libnet-config --libs is broken on your system.  If you)
+    if test `libnet-1.0-config --libs | wc -c` = "1"; then
+        AC_MSG_WARN(libnet-1.0-config --libs is broken on your system.  If you)
         AC_MSG_WARN(are using a precompiled package please notify the) 
         AC_MSG_WARN(maintainer.)
         LDFLAGS="${LDFLAGS} -L/usr/local/lib -L/sw/lib"
-        LIBS="${LIBS} -lnet"
+        LIBS="${LIBS} -lnet-1.0"
     fi
 
     LNET=""
-    AC_CHECK_HEADERS(libnet.h,, LNET="no")
+    AC_CHECK_HEADERS(libnet-1.0.h,, LNET="no")
     if test "x$LNET" = "xno"; then
         echo
         echo "   ERROR!  Libnet header not found, go get it from"
@@ -1291,33 +1291,33 @@
             libnet_dir="/usr/include /usr/local/include /sw/include"
         fi
     else
-        libnet_dir=`libnet-config --cflags | cut -dI -f2`
+        libnet_dir=`libnet-1.0-config --cflags | cut -dI -f2`
     fi
 
     LIBNET_INC_DIR=""
     for i in $libnet_dir; do
-        if test -r "$i/libnet.h"; then
+        if test -r "$i/libnet-1.0.h"; then
             LIBNET_INC_DIR="$i"
         fi
     done
 
     if test "x$LIBNET_INC_DIR" != "x"; then
-        if eval "grep LIBNET_VERSION $LIBNET_INC_DIR/libnet.h | grep -v 1.0.2a >/dev/null"; then
+        if eval "grep LIBNET_VERSION $LIBNET_INC_DIR/libnet-1.0.h | grep -v 1.0.2a >/dev/null"; then
             AC_MSG_RESULT(no)
             echo
             echo "   ERROR!  Snort with --enable-flexresp will *only* work with"
             echo "   libnet version 1.0.2a, go get it from"
             echo "   http://www.packetfactory.net/projects/libnet/"
-            FAIL_MESSAGE("libnet 1.0.2a (libnet.h)", $LIBNET_INC_DIR)
+            FAIL_MESSAGE("libnet 1.0.2a (libnet-1.0.h)", $LIBNET_INC_DIR)
         fi
         AC_MSG_RESULT(yes)
     else
         AC_MSG_RESULT(no)
-        FAIL_MESSAGE("libnet 1.0.2a (libnet.h)", $libnet_dir)
+        FAIL_MESSAGE("libnet 1.0.2a (libnet-1.0.h)", $libnet_dir)
     fi
 
     LNET=""
-    AC_CHECK_LIB(net, libnet_build_ip,, LNET="no")
+    AC_CHECK_LIB(net-1.0, libnet_build_ip,, LNET="no")
     if test "x$LNET" = "xno"; then
         echo
         echo "   ERROR!  Libnet library not found, go get it from"
@@ -1368,8 +1368,8 @@
 [  --enable-react           Intercept and terminate offending HTTP accesses],
        enable_react="$enableval", enable_react="no")
 if test "x$enable_react" = "xyes"; then
-    CPPFLAGS="${CPPFLAGS} -DENABLE_REACT `libnet-config --defines --cflags`"
-    LDFLAGS="${LDFLAGS} `libnet-config --libs`"
+    CPPFLAGS="${CPPFLAGS} -DENABLE_REACT `libnet-1.0-config --defines --cflags`"
+    LDFLAGS="${LDFLAGS} `libnet-1.0-config --libs`"
 fi
 
 if test "x$enable_react" != "xno" -a "x$enable_react" = "xyes"; then
@@ -1380,13 +1380,13 @@
         exit
     fi
 
-    if test `libnet-config --cflags | wc -c` = "1"; then
+    if test `libnet-1.0-config --cflags | wc -c` = "1"; then
         CPPFLAGS="${CPPFLAGS} -I/usr/local/include -I/sw/include"
         LIBNET_CONFIG_BROKEN_CFLAGS="yes"
     fi
 
-    if test `libnet-config --libs | wc -c` = "1"; then
-        AC_MSG_WARN(libnet-config --libs is broken on your system.  If you)
+    if test `libnet-1.0-config --libs | wc -c` = "1"; then
+        AC_MSG_WARN(libnet-1.0-config --libs is broken on your system.  If you)
         AC_MSG_WARN(are using a precompiled package please notify the)
         AC_MSG_WARN(maintainer.)
         LDFLAGS="${LDFLAGS} -L/usr/local/lib -L/sw/lib"
@@ -1394,7 +1394,7 @@
     fi
 
     LNET=""
-    AC_CHECK_HEADERS(libnet.h,, LNET="no")
+    AC_CHECK_HEADERS(libnet-1.0.h,, LNET="no")
     if test "x$LNET" = "xno"; then
         echo
         echo "   ERROR!  Libnet header not found, go get it from"
@@ -1412,33 +1412,33 @@
             libnet_dir="/usr/include /usr/local/include /sw/include"
         fi
     else
-        libnet_dir=`libnet-config --cflags | cut -dI -f2`
+        libnet_dir=`libnet-1.0-config --cflags | cut -dI -f2`
     fi
 
     LIBNET_INC_DIR=""
     for i in $libnet_dir; do
-        if test -r "$i/libnet.h"; then
+        if test -r "$i/libnet-1.0.h"; then
             LIBNET_INC_DIR="$i"
         fi
     done
 
     if test "x$LIBNET_INC_DIR" != "x"; then
-        if eval "grep LIBNET_VERSION $LIBNET_INC_DIR/libnet.h | grep -v 1.0.2a >/dev/null"; then
+        if eval "grep LIBNET_VERSION $LIBNET_INC_DIR/libnet-1.0.h | grep -v 1.0.2a >/dev/null"; then
             AC_MSG_RESULT(no)
             echo
             echo "   ERROR!  Snort with --enable-react will *only* work with"
             echo "   libnet version 1.0.2a, go get it from"
             echo "   http://www.packetfactory.net/projects/libnet/"
-            FAIL_MESSAGE("libnet 1.0.2a (libnet.h)", $LIBNET_INC_DIR)
+            FAIL_MESSAGE("libnet 1.0.2a (libnet-1.0.h)", $LIBNET_INC_DIR)
         fi
         AC_MSG_RESULT(yes)
     else
         AC_MSG_RESULT(no)
-        FAIL_MESSAGE("libnet 1.0.2a (libnet.h)", $libnet_dir)
+        FAIL_MESSAGE("libnet 1.0.2a (libnet-1.0.h)", $libnet_dir)
     fi
 
     LNET=""
-    AC_CHECK_LIB(net, libnet_build_ip,, LNET="no")
+    AC_CHECK_LIB(net-1.0, libnet_build_ip,, LNET="no")
     if test "x$LNET" = "xno"; then
         echo
         echo "   ERROR!  Libnet library not found, go get it from"
Only in snort-2.8.4.rc1_gentoo/: configure.in.orig
diff -ru snort-2.8.4.rc1/src/detection-plugins/sp_react.c snort-2.8.4.rc1_gentoo/src/detection-plugins/sp_react.c
--- snort-2.8.4.rc1/src/detection-plugins/sp_react.c	2009-04-06 08:54:54.000000000 -0400
+++ snort-2.8.4.rc1_gentoo/src/detection-plugins/sp_react.c	2009-04-06 09:08:37.000000000 -0400
@@ -59,7 +59,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <ctype.h>
-#include <libnet.h>
+#include <libnet-1.0.h>
 
 #include "rules.h"
 #include "decode.h"
diff -ru snort-2.8.4.rc1/src/detection-plugins/sp_respond.c snort-2.8.4.rc1_gentoo/src/detection-plugins/sp_respond.c
--- snort-2.8.4.rc1/src/detection-plugins/sp_respond.c	2009-04-06 08:54:54.000000000 -0400
+++ snort-2.8.4.rc1_gentoo/src/detection-plugins/sp_respond.c	2009-04-06 09:08:37.000000000 -0400
@@ -36,7 +36,7 @@
 
 
 #if defined(ENABLE_RESPONSE) && !defined(ENABLE_RESPONSE2)
-#include <libnet.h>
+#include <libnet-1.0.h>
 
 #include "decode.h"
 #include "rules.h"
diff -ru snort-2.8.4.rc1/src/inline.c snort-2.8.4.rc1_gentoo/src/inline.c
--- snort-2.8.4.rc1/src/inline.c	2009-04-06 08:54:54.000000000 -0400
+++ snort-2.8.4.rc1_gentoo/src/inline.c	2009-04-06 09:08:37.000000000 -0400
@@ -20,7 +20,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <pcap.h>
-#include <libnet.h>
+#include <libnet-1.0.h>
 
 #include "decode.h"
 #include "inline.h"