isdnconfig - choose 1, ippp1 to prevent default gateway to ippp0
/etc/isdn/device.ippp1:
edit all lines marked with XXX_:
LOCALIP=
REMOTEIP=AAA.BBB.CCC.DDD
LOCALMSN=''
REMOTEMSN=XXXXX
LEADINGZERO=''
# FIREWALL RULES (start)
iptables -A OUTPUT -o $device -p tcp --dport 22 -j ACCEPT
# FIREWALL RULES (stop)
iptables -D OUTPUT -o $device -p tcp --dport 22 -j ACCEPT
only ssh should trigger a dialout
/etc/isdn/ipppd.ippp1:
-pap
+chap
name USERNAME
noccp
nolzs
noipdefault
nodefaultroute
mru 1524
mtu 1500
ipcp-accept-local
ipcp-accept-remote
useifip
/etc/ppp/chap-secrets
# Secrets for authentication using CHAP
# client server secret IP addresses
USERNAME * PASSWORD
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