PPP - PPTP VPN bricht die Verbindung mit einer seltsamen Debug-Nachricht ab

Ich versuche, eine Verbindung zwischen einem Win2008R2-PPTP-Server und einem Debian 8-Client herzustellen, der PPP verwendet.

Bei der Verbindung zum VPN-Server ist die Authentifizierung erfolgreich. Nach der Authentifizierung werden die MPPE-Einstellungen ausgehandelt. Nach der ersten gesendeten ConfReq-Nachricht sendet der Server eine TermReq-Nachricht zurück, und die Verbindung wird abgebrochen.

Ich habe stundenlang gegoogelt und Optionen hinzugefügt oder geändert, aber ich kann keine Lösung finden :(

Configs:

Kollegen / Omoffice

pty "pptp <hostname> --nolaunchpppd" lock noauth nobsdcomp nodeflate name <username as specified in secrets> remotename omoffice ipparam omoffice file /etc/ppp/omoffice_options.pptp 

omoffice / options.pptp

lock noauth nobsdcomp nodeflate  refuse-pap refuse-eap refuse-mschap refuse-chap require-mschap-v2  require-mppe-128 require-mppe  lcp-echo-failure 5 lcp-echo-interval 60  ipcp-accept-local ipcp-accept-remote noipdefault  mtu 1200 usepeerdns 

Austestungsprotokoll

root@NWSS001:/etc/ppp# pppd call omoffice debug dump logfd 2 nodetach noauth pppd options in effect: debug # (from command line) nodetach # (from command line) logfd 2 # (from command line) dump # (from command line) noauth # (from command line) refuse-pap # (from /etc/ppp/omoffice_options.pptp) refuse-chap # (from /etc/ppp/omoffice_options.pptp) refuse-mschap # (from /etc/ppp/omoffice_options.pptp) refuse-eap # (from /etc/ppp/omoffice_options.pptp) name <username> # (from /etc/ppp/peers/omoffice) remotename omoffice # (from /etc/ppp/peers/omoffice) # (from /etc/ppp/omoffice_options.pptp) pty pptp <hostname> --nolaunchpppd # (from /etc/ppp/peers/omoffice) crtscts # (from /etc/ppp/options) # (from /etc/ppp/options) asyncmap 0 # (from /etc/ppp/options) mtu 1200 # (from /etc/ppp/omoffice_options.pptp) lcp-echo-failure 5 # (from /etc/ppp/omoffice_options.pptp) lcp-echo-interval 60 # (from /etc/ppp/omoffice_options.pptp) hide-password # (from /etc/ppp/options) ipcp-accept-local # (from /etc/ppp/omoffice_options.pptp) ipcp-accept-remote # (from /etc/ppp/omoffice_options.pptp) ipparam omoffice # (from /etc/ppp/peers/omoffice) noipdefault # (from /etc/ppp/omoffice_options.pptp) usepeerdns # (from /etc/ppp/omoffice_options.pptp) nobsdcomp # (from /etc/ppp/omoffice_options.pptp) nodeflate # (from /etc/ppp/omoffice_options.pptp) require-mppe # (from /etc/ppp/omoffice_options.pptp) require-mppe-128 # (from /etc/ppp/omoffice_options.pptp) noipx # (from /etc/ppp/options) using channel 17 Using interface ppp0 Connect: ppp0 <--> /dev/pts/1 sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xec7eb53a> <pcomp> <accomp>] rcvd [LCP ConfReq id=0x0 <mru 1400> <auth eap> <magic 0x10494137> <pcomp> <accomp> <callback CBCP> <mrru 1614> <endpoint [local:d4.6e.95.0f.3c.fa.4f.c4.91.60.3c.04.7f.a8.9a.ee.00.00.00.00]>] sent [LCP ConfRej id=0x0 <callback CBCP> <mrru 1614>] rcvd [LCP ConfAck id=0x1 <asyncmap 0x0> <magic 0xec7eb53a> <pcomp> <accomp>] rcvd [LCP ConfReq id=0x1 <mru 1400> <auth eap> <magic 0x10494137> <pcomp> <accomp> <endpoint [local:d4.6e.95.0f.3c.fa.4f.c4.91.60.3c.04.7f.a8.9a.ee.00.00.00.00]>] sent [LCP ConfNak id=0x1 <auth chap MS-v2>] rcvd [LCP ConfReq id=0x2 <mru 1400> <auth chap MS-v2> <magic 0x10494137> <pcomp> <accomp> <endpoint [local:d4.6e.95.0f.3c.fa.4f.c4.91.60.3c.04.7f.a8.9a.ee.00.00.00.00]>] sent [LCP ConfAck id=0x2 <mru 1400> <auth chap MS-v2> <magic 0x10494137> <pcomp> <accomp> <endpoint [local:d4.6e.95.0f.3c.fa.4f.c4.91.60.3c.04.7f.a8.9a.ee.00.00.00.00]>] sent [LCP EchoReq id=0x0 magic=0xec7eb53a] rcvd [CHAP Challenge id=0x0 <df68f4d085f927160c84928c8864604c>, name = "SBS2011"] added response cache entry 0 sent [CHAP Response id=0x0 <<redacted>>, name = "<redacted username>"] rcvd [LCP EchoRep id=0x0 magic=0x10494137] rcvd [CHAP Success id=0x0 "S=1017EFA7032050D6746BFF44A739A6E7B2F5D824"] response found in cache (entry 0) CHAP authentication succeeded sent [CCP ConfReq id=0x1 <mppe +H -M +S +L -D -C>] rcvd [LCP TermReq id=0x4 10 49 41 37 00 3c cd 74 00 00 08 9a] LCP terminated by peer (^PIA7^@<M-Mt^@^@^HM-^Z) sent [LCP TermAck id=0x4]