Guys I have problem in having - kernel 2.4(Fedora Core 1) + ip_nat_pptp (in patch-o-matic 20040406) loaded with - running pptpd 1.2.1 Server Side Configuration: -Linux 2.4 Fedora Core 1, patched by pptp-conntrack-nat properly(tested for proper NAT + ConnectionTracking on multiple PPTP-Tunnel sessions) -iptables 1.2.11 patched the same as kernel -pptpd 1.2.1 -ppp 2.4.3 cvs20040527.4 -lsmod output: =================================== Module Size Used by Not tainted ip_nat_pptp 3308 0 (unused) ip_conntrack_pptp 4304 1 [ip_nat_pptp] ip_conntrack_proto_gre 4852 0 [ip_nat_pptp ip_conntrack_pptp] ppp_mppe 14040 0 (autoclean) ppp_async 9888 0 (autoclean) ppp_generic 27584 0 (autoclean) [ppp_mppe ppp_async] slhc 6844 0 (autoclean) [ppp_generic] autofs 13780 0 (autoclean) (unused) iptable_filter 2412 0 (autoclean) (unused) pcnet32 18464 1 mii 4124 0 [pcnet32] ip_nat_ftp 4048 0 (unused) ip_conntrack_ftp 5584 1 [ip_nat_ftp] iptable_nat 23352 2 (autoclean) [ip_nat_pptp ip_nat_ftp] ip_conntrack 33032 4 (autoclean) [ip_nat_pptp ip_conntrack_pptp ip_conntrack_proto_gre ip_nat_ftp ip_conntrack_ftp iptable_nat] ip_tables 16544 4 [iptable_filter iptable_nat] floppy 58908 0 (autoclean) sg 37612 0 (autoclean) (unused) microcode 5024 0 (autoclean) keybdev 2976 0 (unused) mousedev 5688 0 (unused) hid 24772 0 (unused) input 6208 0 [keybdev mousedev hid] usb-uhci 27468 0 (unused) usbcore 82912 1 [hid usb-uhci] ext3 74148 2 jbd 56560 2 [ext3] BusLogic 101084 0 sd_mod 13740 0 (unused) scsi_mod 112232 3 [sg BusLogic sd_mod] =================================== Client Side configuration: Win2k3 VPN Client set to support any encryption - optional - and any username/password authentication method when I try to dig a PPTP-VPN tunnel to this machine, using a pptp client software, I get error messages and connection fails: Client Side error: "Error 619: A connection to the remote computer could not be established, so the port used for this connection was closed." Server Side error: (/var/log/messages on the Server) ===================================== Dec 21 17:09:38 server pptpd[17740]: CTRL: Client 192.168.0.101 control connection started Dec 21 17:09:38 server pptpd[17740]: CTRL: Starting call (launching pppd, opening GRE) Dec 21 17:09:38 server kernel: application bug: pppd(17741) has SIGCHLD set to SIG_IGN but calls wait(). Dec 21 17:09:38 server kernel: (see the NOTES section of 'man 2 wait'). Workaround activated. Dec 21 17:09:38 server pppd[17741]: pppd 2.4.3 started by root, uid 0 Dec 21 17:09:38 server pppd[17741]: Using interface ppp0 Dec 21 17:09:38 server pppd[17741]: Connect: ppp0 <--> /dev/pts/1 Dec 21 17:10:09 server pppd[17741]: LCP: timeout sending Config-Requests Dec 21 17:10:09 server pppd[17741]: Connection terminated. Dec 21 17:10:09 server pppd[17741]: Exit. Dec 21 17:10:09 server pptpd[17740]: GRE: read(fd=5,buffer=804e6e0,len=8196) from PTY failed: status = -1 error = Input/output error, usually caused by unexpected termination of pppd, check option syntax and pppd logs Dec 21 17:10:09 server pptpd[17740]: CTRL: PTY read or GRE write failed (pty,gre)=(5,6) Dec 21 17:10:09 server pptpd[17740]: CTRL: Client 192.168.0.101 control connection finished ===================================== /var/log/ppp/pppd.log ===================================== ==> /var/log/ppp/pppd.log <== using channel 29 Using interface ppp0 Connect: ppp0 <--> /dev/pts/1 sent [LCP ConfReq id=0x1 <asyncmap 0x0> <auth chap MS-v2> <magic 0xab867b16> <pcomp> <accomp>] rcvd [LCP ConfReq id=0x0 <mru 1400> <magic 0x347a73ef> <pcomp> <accomp> <callback CBCP>] sent [LCP ConfRej id=0x0 <callback CBCP>] rcvd [LCP ConfReq id=0x1 <mru 1400> <magic 0x347a73ef> <pcomp> <accomp> <callback CBCP>] sent [LCP ConfRej id=0x1 <callback CBCP>] sent [LCP ConfReq id=0x1 <asyncmap 0x0> <auth chap MS-v2> <magic 0xab867b16> <pcomp> <accomp>] rcvd [LCP ConfReq id=0x2 <mru 1400> <magic 0x347a73ef> <pcomp> <accomp> <callback CBCP>] sent [LCP ConfRej id=0x2 <callback CBCP>] sent [LCP ConfReq id=0x1 <asyncmap 0x0> <auth chap MS-v2> <magic 0xab867b16> <pcomp> <accomp>] rcvd [LCP ConfReq id=0x3 <mru 1400> <magic 0x347a73ef> <pcomp> <accomp> <callback CBCP>] sent [LCP ConfRej id=0x3 <callback CBCP>] sent [LCP ConfReq id=0x1 <asyncmap 0x0> <auth chap MS-v2> <magic 0xab867b16> <pcomp> <accomp>] sent [LCP ConfReq id=0x1 <asyncmap 0x0> <auth chap MS-v2> <magic 0xab867b16> <pcomp> <accomp>] rcvd [LCP ConfReq id=0x4 <mru 1400> <magic 0x347a73ef> <pcomp> <accomp> <callback CBCP>] sent [LCP ConfRej id=0x4 <callback CBCP>] sent [LCP ConfReq id=0x1 <asyncmap 0x0> <auth chap MS-v2> <magic 0xab867b16> <pcomp> <accomp>] rcvd [LCP ConfReq id=0x5 <mru 1400> <magic 0x347a73ef> <pcomp> <accomp> <callback CBCP>] sent [LCP ConfRej id=0x5 <callback CBCP>] sent [LCP ConfReq id=0x1 <asyncmap 0x0> <auth chap MS-v2> <magic 0xab867b16> <pcomp> <accomp>] rcvd [LCP ConfReq id=0x6 <mru 1400> <magic 0x347a73ef> <pcomp> <accomp> <callback CBCP>] sent [LCP ConfRej id=0x6 <callback CBCP>] sent [LCP ConfReq id=0x1 <asyncmap 0x0> <auth chap MS-v2> <magic 0xab867b16> <pcomp> <accomp>] sent [LCP ConfReq id=0x1 <asyncmap 0x0> <auth chap MS-v2> <magic 0xab867b16> <pcomp> <accomp>] rcvd [LCP ConfReq id=0x7 <mru 1400> <magic 0x347a73ef> <pcomp> <accomp> <callback CBCP>] sent [LCP ConfRej id=0x7 <callback CBCP>] sent [LCP ConfReq id=0x1 <asyncmap 0x0> <auth chap MS-v2> <magic 0xab867b16> <pcomp> <accomp>] rcvd [LCP ConfReq id=0x8 <mru 1400> <magic 0x347a73ef> <pcomp> <accomp> <callback CBCP>] sent [LCP ConfRej id=0x8 <callback CBCP>] LCP: timeout sending Config-Requests Connection terminated. ===================================== ==>Interesting part is, If I unload "ip_nat_pptp" module then connection will be established well with no errors.<== The configuration files, /etc/pptpd.conf and /etc/ppp/option.pptpd and /etc/ppp/options were tested to work properly - with the above configurations but with the original (not patched) kernel and iptables! Anyone can help please? TIA
