L2TP Client: SNOM

• Some SNOM phones support adding an L2TP firmware patch that gives the phone the ability to connect to a L2TP server.
• This can help bypass firewalls and NAT/CGNAT which can cause problems with VoIP.
• The config files need to be put in a .tar file hosted on a webserver for the SNOM to fetch.
• Further details are on the SNOM website: https://service.snom.com/display/wiki/Install+and+configure+L2TP+on+Snom+Deskphones

Example config files:

xl2tpd.conf

[lac l2tp_connection]
lns = 90.155.53.19
ppp debug = yes
pppoptfile = /l2tp/options.xl2tpd
length bit = yes
redial = yes
redial timeout = 30
max redials = 1440

options.xl2tpd

refuse-eap
require-chap
noccp
noauth
mtu 1280
mru 1280
noipdefault
nodefaultroute
usepeerdns
connect-delay 5000
name USERNAME@a.X
password PASSWORD