[pptp-server] Protocol 47

[Buro RM - John van Lit]

all,

I have my poptop server running in my private network. the firewall is is
allowd to point all the traffic that is comming on port 1723 to my poptop
server.
When i try to make a connection the session ends with the error code 619 the
specified port is not connected.
I have done a tcpdump on my ppp0 interface which gives me the following
information.

10:58:06.802676 195.121.230.19.unisys-lm 213.84.233.74.pptp: S
1582148474:1582148474(0) win 8760 (DF) 
10:58:06.804331 213.84.233.74.pptp 195.121.230.19.unisys-lm: S
3444247836:3444247836(0) ack 1582148475 win 32120 (DF) 
10:58:06.999409 195.121.230.19.unisys-lm 213.84.233.74.pptp: . 1:1(0) ack 1
win 8760 (DF) 
10:58:07.042582 195.121.230.19.unisys-lm 213.84.233.74.pptp: P 1:157(156)
ack 1 win 8760 (DF) 
10:58:07.043329 213.84.233.74.pptp 195.121.230.19.unisys-lm: . 1:1(0) ack
157 win 31964 (DF) 
10:58:07.044106 213.84.233.74.pptp 195.121.230.19.unisys-lm: P 1:157(156)
ack 157 win 32120 (DF) 
10:58:07.252835 195.121.230.19.unisys-lm 213.84.233.74.pptp: P 157:325(168)
ack 157 win 8604 (DF) 
10:58:07.256349 213.84.233.74.pptp 195.121.230.19.unisys-lm: P 157:189(32)
ack 325 win 32120 (DF) 
10:58:07.419128 195.121.230.19.unisys-lm 213.84.233.74.pptp: P 325:349(24)
ack 189 win 8572 (DF) 
10:58:07.436570 213.84.233.74.pptp 195.121.230.19.unisys-lm: . 189:189(0)
ack 349 win 32120 (DF) 10:58:07.495955 gre-proto-0x880B (gre encap) 
10:58:07.496353 213.84.233.74 195.121.230.19: icmp: 213.84.233.74 protocol
47 unreachable [tos 0xc0] 
10:58:09.190054 gre-proto-0x880B (gre encap) 
10:58:09.190411 213.84.233.74 195.121.230.19: icmp: 213.84.233.74 protocol
47 unreachable [tos 0xc0] 
10:58:12.144936 gre-proto-0x880B (gre encap) 
10:58:12.145302 213.84.233.74 195.121.230.19: icmp: 213.84.233.74 protocol
47 unreachable [tos 0xc0] 
10:58:17.325088 gre-proto-0x880B (gre encap) 
10:58:17.325451 213.84.233.74 195.121.230.19: icmp: 213.84.233.74 protocol
47 unreachable [tos 0xc0] 
10:58:20.146905 gre-proto-0x880B (gre encap) 
10:58:20.147255 213.84.233.74 195.121.230.19: icmp: 213.84.233.74 protocol
47 unreachable [tos 0xc0] 
10:58:24.151466 gre-proto-0x880B (gre encap) 
10:58:24.151824 213.84.233.74 195.121.230.19: icmp: 213.84.233.74 protocol
47 unreachable [tos 0xc0] 
10:58:28.149595 gre-proto-0x880B (gre encap) 
10:58:28.149951 213.84.233.74 195.121.230.19: icmp: 213.84.233.74 protocol
47 unreachable [tos 0xc0] 
10:58:32.154418 gre-proto-0x880B (gre encap) 
10:58:32.154785 213.84.233.74 195.121.230.19: icmp: 213.84.233.74 protocol
47 unreachable [tos 0xc0] 
10:58:36.158481 gre-proto-0x880B (gre encap) 
10:58:36.158850 213.84.233.74 195.121.230.19: icmp: 213.84.233.74 protocol
47 unreachable [tos 0xc0] 
10:58:37.403953 213.84.233.74.pptp 195.121.230.19.unisys-lm: F 189:189(0)
ack 349 win 32120 (DF) 
10:58:37.594457 195.121.230.19.unisys-lm 213.84.233.74.pptp: F 349:349(0)
ack 190 win 8572 (DF)
 10:58:37.595080 213.84.233.74.pptp 195.121.230.19.unisys-lm: . 190:190(0)
ack 350 win 32120 (DF) 
When i look at my ipchains rules protocol 47 is accepted.
this is the configuration of my poptop server
pptpd.conf
speed 115200
localip 192.168.10.225-250 
remoteip 192.168.1.225-250 

options
debug 
auth 
name poptop 
require-chap 
proxyarp 
ms-wins 192.168.10.1

chap-secrets
# Secrets for authentication using CHAP
# client server secret IP addresses 
john poptop xxxx *

can anyone help me???
Rgds,

John