diff -Naur xl2tpd-1.3.1-orig/examples/xl2tpd.conf xl2tpd-1.3.1/examples/xl2tpd.conf
--- xl2tpd-1.3.1-orig/examples/xl2tpd.conf	2011-10-06 15:22:05.000000000 -0400
+++ xl2tpd-1.3.1/examples/xl2tpd.conf	2012-06-12 11:40:10.870840864 -0400
@@ -14,6 +14,11 @@
 ; in the example below). Yet another IP address (local ip, e.g. 192.168.1.99)
 ; will be used by xl2tpd as its address on pppX interfaces.
 
+
+; IMPORTANT: always set listen-addr to a specific address, to work around a
+; udpfromto bug!!!
+
+
 [global]
 ; listen-addr = 192.168.1.98
 ;
@@ -31,7 +36,8 @@
 [lns default]
 ip range = 192.168.1.128-192.168.1.254
 local ip = 192.168.1.99
-require chap = yes
+; leave chap unspecified for maximum compatibility with windows, iOS, etc
+; require chap = yes
 refuse pap = yes
 require authentication = yes
 name = LinuxVPNserver