poptop: pptp - err Port Not Connected.
 

Trying to use POPTOP / PPTP for VPN access to my home network from work.

Redhat 9.0 Server running latest POPTOP / PPTP

when I try to connect, it gives me:

619: the specified port is not connected.

the server log shows:

Nov 4 14:00:06 trekkserver pptpd[17427]: CTRL: Client 66.156.205.235 control connection started
Nov 4 14:00:06 trekkserver pptpd[17427]: CTRL: Starting call (launching pppd, opening GRE)
Nov 4 14:00:06 trekkserver pppd[17428]: invalid address parameter '<ip-of-your-winsserver>' for ms-wins option
Nov 4 14:00:06 trekkserver pptpd[17427]: GRE: read(fd=5,buffer=804d920,len=8196) from PTY failed: status = -1 error = Input/output error
Nov 4 14:00:06 trekkserver pptpd[17427]: CTRL: PTY read or GRE write failed (pty,gre)=(5,10)
Nov 4 14:00:06 trekkserver pptpd[17427]: CTRL: Client 66.156.205.235 control connection finished

Ideas?

invalid address parameter '<ip-of-your-winsserver>' for ms-wins option

means it doesn't like this entry in your /etc/pptpd.conf file

And have you recompiled the kernel for GRE?

don't know how to recompile... didn't know I needed too....

Will check the conf file in just a sec.

pptpd.conf

option /etc/ppp/options.pptpd
localip 192.168.0.10
remoteip 192.168.0.200-254

?

Whoops, going too fast for myself there...

Check /etc/ppp/options.pptpd and correct the ms-wins entry or comment it out.
Check the ms-dns entry as well.

The kernel needs to have support for gre protocol.
This is a recompile of the kernel to make the gre and pptp modules for your specific kernel.

Yea... figured that out after the last post and already # it out.... now get:

Nov 4 14:31:06 trekkserver pptpd[18056]: CTRL: Client 66.156.205.235 control connection started
Nov 4 14:31:06 trekkserver pptpd[18056]: CTRL: Starting call (launching pppd, opening GRE)
Nov 4 14:31:06 trekkserver kernel: application bug: pppd(18057) has SIGCHLD set to SIG_IGN but calls wait().
Nov 4 14:31:06 trekkserver kernel: (see the NOTES section of 'man 2 wait'). Workaround activated.
Nov 4 14:31:06 trekkserver kernel: CSLIP: code copyright 1989 Regents of the University of California
Nov 4 14:31:06 trekkserver kernel: PPP generic driver version 2.4.2
Nov 4 14:31:06 trekkserver pppd[18057]: pppd 2.4.2b3 started by root, uid 0
Nov 4 14:31:07 trekkserver pppd[18057]: Using interface ppp0
Nov 4 14:31:07 trekkserver pppd[18057]: Connect: ppp0 <--> /dev/pts/1
Nov 4 14:31:07 trekkserver /etc/hotplug/net.agent: assuming ppp0 is already up
Nov 4 14:31:37 trekkserver pppd[18057]: LCP: timeout sending Config-Requests
Nov 4 14:31:37 trekkserver pppd[18057]: Connection terminated.
Nov 4 14:31:37 trekkserver pppd[18057]: Exit.
Nov 4 14:31:37 trekkserver pptpd[18056]: GRE: read(fd=5,buffer=804d920,len=8196) from PTY failed: status = -1 error = Input/output error
Nov 4 14:31:37 trekkserver pptpd[18056]: CTRL: PTY read or GRE write failed (pty,gre)=(5,10)
Nov 4 14:31:37 trekkserver pptpd[18056]: CTRL: Client 66.156.205.235 control connection finished
Nov 4 14:31:37 trekkserver /etc/hotplug/net.agent: NET unregister event not supported

When I lsmod, I get

ppp_mppe
bsd_comp
ppp_async
ppp_generic
slhc
8139too
mii
ip_nat_pptp
ip_nat_proto_gre
ip_conntrack_pptp
ip_conntrack_proto_gre
ipt_REJECT

(The last 4 are from the patch-o-matic kernel updates to allow more than one pptp connection at a time.)

Do you get the first 4 showing?
Try insmod ip_gre. This is the new module after compiling the new kernel and modules.

If not, you will need to add GRE and PPTP support in your kernel.

I get...

#insmod ip_gre

Using /lib/modules/2.4.20-20.9/kernel/net/ipv4/ip_gre.o

When I lsmod I get:

Module Size Used by Tainted: P
ip_gre 11072 0 (unused)
ppp_async 9440 0 (autoclean)
ppp_generic 24572 0 (autoclean) [ppp_async]
slhc 6756 0 (autoclean) [ppp_generic]
lvm-mod 64000 0 (unused)
nvidia 1764992 11 (autoclean)
binfmt_misc 7432 1
parport_pc 19076 1 (autoclean)
lp 8996 0 (autoclean)
parport 37056 1 (autoclean) [parport_pc lp]
autofs 13268 0 (autoclean) (unused)
ipt_ttl 1144 1 (autoclean)
ipt_unclean 8024 2 (autoclean)
ipt_limit 1560 34 (autoclean)
ipt_state 1080 7 (autoclean)
iptable_mangle 2776 0 (unused)
ipt_LOG 4184 1
ipt_MASQUERADE 2200 0 (unused)
ipt_TOS 1656 0 (unused)
ipt_REDIRECT 1368 0 (unused)
iptable_nat 21752 0 [ipt_MASQUERADE ipt_REDIRECT]
ipt_REJECT 3992 0 (unused)
ip_conntrack_irc 4112 0 (unused)
ip_conntrack_ftp 5296 0 (unused)
ip_conntrack 27272 4 [ipt_state ipt_MASQUERADE ipt_REDIRECT iptable_nat ip_conntrack_irc ip_conntrack_ftp]
iptable_filter 2412 1 (autoclean)
ip_tables 15096 14 [ipt_ttl ipt_unclean ipt_limit ipt_state iptable_mangle ipt_LOG ipt_MASQUERADE ipt_TOS ipt_REDIRECT iptable_nat ipt_REJECT iptable_filter]
8139too 18120 1
mii 3976 0 [8139too]
sg 36524 0 (autoclean)
sr_mod 18136 0 (autoclean)
microcode 4668 0 (autoclean)
ide-scsi 12208 0
scsi_mod 107544 3 [sg sr_mod ide-scsi]
ide-cd 35712 0
cdrom 33728 0 [sr_mod ide-cd]
raid1 14956 1 (autoclean)
keybdev 2976 0 (unused)
mousedev 5556 1
hid 22244 0 (unused)
input 5856 0 [keybdev mousedev hid]
usb-uhci 26412 0 (unused)
usbcore 79040 1 [hid usb-uhci]
ext3 70784 2
jbd 51924 2 [ext3]

We need to be sure that your kernel does/doesn't have GRE support ...

Please do grep GRE /boot/config-2.4.20-20.9
(Put your kernel version in there).

CONFIG_NET_SCH_GRED=m
CONFIG_NET_SCH_INGRESS=m
CONFIG_NET_IPGRE=m
CONFIG_NET_IPGRE_BROADCAST=y

Excellent, it is in there..

So, now to make some changes to your /etc/ppp/options.pptpd
Mine has...

lock
noauth
mtu 1450
mru 1450
ipcp-accept-local
ipcp-accept-remote
lcp-echo-failure 3
lcp-echo-interval 5
nodeflate


## turn pppd syslog debugging on
debug

## change 'pptpd' to whatever you specify as your server name in chap-secrets
name pptpd

proxyarp
#nobsdcomp

# This option applies if you use ppp with chapms-strip-domain patch
#chapms-strip-domain

# These options apply if you use ppp with mppe patch
# NB! You should also apply the ChapMS-V2 patch
-chap
#+chap
-chapms
#require-chapms-v2
+chapms-v2
#refuse-pap
#refuse-chap
#refuse-mschap
#-eap
#mppe-40
mppe-128
#require-mppe
mppe-stateless

Similar to yours?

## CHANGE TO SUIT YOUR SYSTEM
lock

## turn pppd syslog debugging on
debug

## change 'pptpd' to whatever you specify as your server name in chap-secrets

# Don't need this
nobsdcomp

# Tell pptpd to find local interface and put it in proxyarp mode
proxyarp

# This option applies if you use ppp with chapms-strip-domain patch
#chapms-strip-domain

# These options are for use with the OpenSSL-licensed patch
# This flavor will be obsoleted ASAP.

# These options are for use with the OpenSSL-licensed patch
# This flavor will be obsoleted ASAP.
# NB! You should also apply the ChapMS-V2 patch
-chap
-chapms
+chapms-v2
#mppe-40 # both 40-bits and 128-bits encryption bite eachother
mppe-128
mppe-stateless

# These options are for use with the BSD-licensed patch (ppp => 2.4.2)
# This is the default implementation
#refuse-pap
#refuse-chap
#refuse-mschap
#require-mschap-v2
#require-mppe

# These options will tell ppp to pass on these to your clients


# These options will tell ppp to pass on these to your clients
# To use ms-dns or ms-dns in options.pptpd it must exist in /etc/resolv.conf
#ms-wins <ip-of-your-winsserver>
#ms-dns <ip-of-your-dnsserver>


noauth

Changed the chap sections to what I just posted - and restarted pptpd: same error but different in the log...

Nov 4 16:35:11 trekkserver pptpd[18483]: CTRL: Client 66.156.205.235 control connection started
Nov 4 16:35:11 trekkserver pptpd[18483]: CTRL: Starting call (launching pppd, opening GRE)
Nov 4 16:35:11 trekkserver pppd[18484]: In file /etc/ppp/options.pptpd: unrecognized option '-chapms'
Nov 4 16:35:11 trekkserver pptpd[18483]: GRE: read(fd=5,buffer=804d920,len=8196) from PTY failed: status = -1 error = Input/output error
Nov 4 16:35:11 trekkserver pptpd[18483]: CTRL: PTY read or GRE write failed (pty,gre)=(5,10)
Nov 4 16:35:11 trekkserver pptpd[18483]: CTRL: Client 66.156.205.235 control connection finished

Ok, add the lines that refer to LCP, MTU, MRU & ipcp, then restart pptpd.