Hi,

it came to my view 
(https://forum.ipfire.org/viewtopic.php?f=27&t=15377&sid=a93f68dc580a6301bb3afe3a85d0c44d#p92425) 
that there is an update for 'arping'. New version is 2.15 (IPFire: 
2.05). Having the time, I tried.

First results:

- After some lfs-changes building seems ok, Diffs are as follows:

***SNIP***
diff --git a/lfs/arping b/lfs/arping
index 13eb05e..7680fdb 100644
--- a/lfs/arping
+++ b/lfs/arping
@@ -1,7 +1,7 @@
 
###############################################################################
  # 
         #
  # IPFire.org - A linux based firewall 
         #
-# Copyright (C) 2007  Michael Tremer & Christian Schmidt 
        #
+# Copyright (C) 2015  Michael Tremer & Christian Schmidt 
        #
  # 
         #
  # This program is free software: you can redistribute it and/or modify 
        #
  # it under the terms of the GNU General Public License as published by 
        #
@@ -24,7 +24,7 @@

  include Config

-VER        = 2.05
+VER        = 2.15

  THISAPP    = arping-$(VER)
  DL_FILE    = $(THISAPP).tar.gz
@@ -40,7 +40,7 @@ objects = $(DL_FILE)

  $(DL_FILE) = $(DL_FROM)/$(DL_FILE)

-$(DL_FILE)_MD5 = 96e7c2ce8ae09046e264a314eeaac4dd
+$(DL_FILE)_MD5 = 676584f6eb4ccc8c70fc6b2c702df75d

  install : $(TARGET)

@@ -70,7 +70,8 @@ $(subst %,%_MD5,$(objects)) :
  $(TARGET) : $(patsubst %,$(DIR_DL)/%,$(objects))
  	@$(PREBUILD)
  	@rm -rf $(DIR_APP) && cd $(DIR_SRC) && tar zxf $(DIR_DL)/$(DL_FILE)
+	cd $(DIR_APP) && ./configure --prefix=/usr
  	cd $(DIR_APP) && make $(MAKETUNING)
-	cd $(DIR_APP) && install -m 0755 arping /usr/sbin
+	cd $(DIR_APP) && make install-exec
  	@rm -rf $(DIR_APP)
  	@$(POSTBUILD)
***SNAP***

Resulting binary is a bit small. Smaller than expected. Ok, nevertheless 
- ("...this will NOT work...!") -  copied it to '/usr/sbin' (after 
making a backup... ;-) ).

Rebooting the machine showed no visible problems. At first. But after 
starting SSH, I couldn't no longer login with PuTTY. Exactly NOTHING 
happens.

SSH-Log shows:

...
11:18:02	sshd[2852]: 	Server listening on 0.0.0.0 port 222.
11:18:02	sshd[2852]: 	Server listening on :: port 222.
11:18:02	sshd[2859]: 	error: Bind to port 222 on 0.0.0.0 failed: Address 
already in use.
11:18:02	sshd[2859]: 	error: Bind to port 222 on :: failed: Address 
already in use.
11:18:02	sshd[2859]: 	fatal: Cannot bind any address.
...

Copied the old 'arping 2.05' back to '/usr/sbin', rebooted, PuTTY works.

Ok, so there is something missing (in lfs!?), probably 
configure-options, which is beyond my small programming skills. If 
anyone is interested in the new 'arping'-version and capable of this: 
any hints are welcome. ;-)

Best,
Matthias