diff -pur dillo/src/dillo.c dillo-local/src/dillo.c
--- dillo/src/dillo.c	Wed Aug 14 11:36:10 2002
+++ dillo-local/src/dillo.c	Wed Aug 14 11:41:30 2002
@@ -61,6 +61,7 @@ typedef struct {
 } DilloCLIOptions;
 
 enum {
+   DILLO_CLI_LOCAL         = 1 << 0,
    DILLO_CLI_HELP          = 1 << 29,
    DILLO_CLI_VERSION       = 1 << 30,
    DILLO_CLI_ERROR         = 1 << 31
@@ -90,6 +91,8 @@ gint main(int argc, char *argv[])
    gint i;
    char **opt_argv = NULL;
    DilloCLIOptions dillo_options[] = {
+     {"-l", "--localonly",       0, DILLO_CLI_LOCAL,
+      "  -l, --localonly       Allow only local host browsing."},
      {"-v", "--version",    0, DILLO_CLI_VERSION,
       "  -v, --version         Display version info and exit."},
      {"-h", "--help",       0, DILLO_CLI_HELP,
@@ -122,6 +125,8 @@ gint main(int argc, char *argv[])
          Dillo_print_help(dillo_options);
          return 0;
          break;
+       case DILLO_CLI_LOCAL:
+         break;
        default:
          printf("Error in command line options.\n");
          return -1;
@@ -141,7 +146,7 @@ gint main(int argc, char *argv[])
    g_free(file);
 
    a_Prefs_init();
-   a_Dns_init();
+   a_Dns_init(cli_options & DILLO_CLI_LOCAL);
    a_Http_init();
    a_Mime_init();
    a_Cache_init();
diff -pur dillo/src/dns.c dillo-local/src/dns.c
--- dillo/src/dns.c	Tue Aug  6 18:03:56 2002
+++ dillo-local/src/dns.c	Wed Aug 14 11:37:06 2002
@@ -85,6 +85,7 @@ static gint Dns_timeout_client(gpointer 
 /*
  * Local Data
  */
+static gboolean dns_block_non_local;
 static DnsServer dns_server[G_DNS_MAX_SERVERS];
 static gint num_servers;
 static GDnsCache *dns_cache;
@@ -184,11 +185,13 @@ static void Dns_cache_add(char *hostname
 /*
  *  Initializer function
  */
-void a_Dns_init(void)
+void a_Dns_init(gboolean block_non_local)
 {
    gint i;
 
    DEBUG_MSG(5, "dillo_dns_init: Here we go!\n");
+   dns_block_non_local = block_non_local;
+
    dns_queue_size = 0;
    dns_queue_size_max = 16;
    dns_queue = g_new(GDnsQueue, dns_queue_size_max);
@@ -247,6 +250,8 @@ static void *Dns_server(void *data)
    } else {
       memcpy(&ip_addr, host->h_addr_list[0], sizeof(ip_addr));
       ip_addr = ntohl(ip_addr);
+      if (dns_block_non_local && (ip_addr & 0xff000000) != 0x7f000000)
+         ip_addr = 0;
    }
 
    /* write hostname to client */
diff -pur dillo/src/dns.h dillo-local/src/dns.h
--- dillo/src/dns.h	Tue Aug  6 18:03:56 2002
+++ dillo-local/src/dns.h	Wed Aug 14 11:37:06 2002
@@ -8,7 +8,7 @@
 extern "C" {
 #endif /* __cplusplus */
 
-void a_Dns_init (void);
+void a_Dns_init (gboolean block_non_local);
 void a_Dns_freeall(void);
 void a_Dns_ccc(int Op, int Br, ChainLink *Info, void *Data, void *ExtraData);