Avere un Macintosh (10.8.2) che si collega perfettamente a un server virtuale virtuale CentOS 6.0 (OpenVZ, con PPP aggiunto dall'host) tramite PPTP.
Un client Windows 7 Home Premium (virtualizzato in Virtual Box di Sun), sullo stesso computer, che utilizza la stessa connessione Ethernet, non può connettersi al server VPN Linux.
Ho iptables disabilitato (per il test) sulla scatola Linux. Ho il firewall di Windows spento. / var / log / messages assomiglia a questo, per una connessione Windows:
Oct 12 18:44:30 production pptpd[1880]: CTRL: Client 66.104.246.168 control connection started
Oct 12 18:44:30 production pptpd[1880]: CTRL: Starting call (launching pppd, opening GRE)
Oct 12 18:44:30 production pppd[1881]: Plugin /usr/lib/pptpd/pptpd-logwtmp.so loaded.
Oct 12 18:44:30 production pppd[1881]: pptpd-logwtmp: $Version$
Oct 12 18:44:30 production pppd[1881]: pppd options in effect:
Oct 12 18:44:30 production pppd[1881]: debug#011#011# (from /etc/ppp/options.pptpd)
Oct 12 18:44:30 production pppd[1881]: nologfd#011#011# (from /etc/ppp/options.pptpd)
Oct 12 18:44:30 production pppd[1881]: dump#011#011# (from /etc/ppp/options.pptpd)
Oct 12 18:44:30 production pppd[1881]: plugin /usr/lib/pptpd/pptpd-logwtmp.so#011#011# (from command line)
Oct 12 18:44:30 production pppd[1881]: require-mschap-v2#011#011# (from /etc/ppp/options.pptpd)
Oct 12 18:44:30 production pppd[1881]: refuse-pap#011#011# (from /etc/ppp/options.pptpd)
Oct 12 18:44:30 production pppd[1881]: refuse-chap#011#011# (from /etc/ppp/options.pptpd)
Oct 12 18:44:30 production pppd[1881]: refuse-mschap#011#011# (from /etc/ppp/options.pptpd)
Oct 12 18:44:30 production pppd[1881]: name pptpd#011#011# (from /etc/ppp/options.pptpd)
Oct 12 18:44:30 production pppd[1881]: pptpd-original-ip 66.104.246.168#011#011# (from command line)
Oct 12 18:44:30 production pppd[1881]: 115200#011#011# (from command line)
Oct 12 18:44:30 production pppd[1881]: lock#011#011# (from /etc/ppp/options.pptpd)
Oct 12 18:44:30 production pppd[1881]: local#011#011# (from command line)
Oct 12 18:44:30 production pppd[1881]: novj#011#011# (from /etc/ppp/options.pptpd)
Oct 12 18:44:30 production pppd[1881]: novjccomp#011#011# (from /etc/ppp/options.pptpd)
Oct 12 18:44:30 production pppd[1881]: ipparam 66.104.246.168#011#011# (from command line)
Oct 12 18:44:30 production pppd[1881]: proxyarp#011#011# (from /etc/ppp/options.pptpd)
Oct 12 18:44:30 production pppd[1881]: 192.168.97.1:192.168.97.10#011#011# (from command line)
Oct 12 18:44:30 production pppd[1881]: nobsdcomp#011#011# (from /etc/ppp/options.pptpd)
Oct 12 18:44:30 production pppd[1881]: require-mppe-128#011#011# (from /etc/ppp/options.pptpd)
Oct 12 18:44:30 production pppd[1881]: mppe-stateful#011#011# (from /etc/ppp/options.pptpd)
Oct 12 18:44:30 production pppd[1881]: pppd 2.4.5 started by root, uid 0
Oct 12 18:44:30 production pppd[1881]: Using interface ppp0
Oct 12 18:44:30 production pppd[1881]: Connect: ppp0 <--> /dev/pts/1
(A questo punto la macchina Windows visualizza una finestra di dialogo, che legge: "Verifica nome utente e password ...")
Oct 12 18:45:00 production pppd[1881]: LCP: timeout sending Config-Requests
Oct 12 18:45:00 production pppd[1881]: Connection terminated.
Oct 12 18:45:00 production pppd[1881]: Modem hangup
Oct 12 18:45:00 production pppd[1881]: Exit.
Oct 12 18:45:00 production pptpd[1880]: GRE: read(fd=6,buffer=8059660,len=8196) from PTY failed: status = -1 error = Input/output error, usually caused by unexpected termination of pppd, check option syntax and pppd logs
Oct 12 18:45:00 production pptpd[1880]: CTRL: PTY read or GRE write failed (pty,gre)=(6,7)
Oct 12 18:45:00 production pptpd[1880]: CTRL: Client 66.104.246.168 control connection finished
La connessione Macintosh ha questo aspetto in / var / log / messages:
Oct 12 18:50:49 production pptpd[1920]: CTRL: Client 66.104.246.168 control connection started
Oct 12 18:50:49 production pptpd[1920]: CTRL: Starting call (launching pppd, opening GRE)
Oct 12 18:50:49 production pppd[1921]: Plugin /usr/lib/pptpd/pptpd-logwtmp.so loaded.
Oct 12 18:50:49 production pppd[1921]: pptpd-logwtmp: $Version$
Oct 12 18:50:49 production pppd[1921]: pppd options in effect:
Oct 12 18:50:49 production pppd[1921]: debug#011#011# (from /etc/ppp/options.pptpd)
Oct 12 18:50:49 production pppd[1921]: nologfd#011#011# (from /etc/ppp/options.pptpd)
Oct 12 18:50:49 production pppd[1921]: dump#011#011# (from /etc/ppp/options.pptpd)
Oct 12 18:50:49 production pppd[1921]: plugin /usr/lib/pptpd/pptpd-logwtmp.so#011#011# (from command line)
Oct 12 18:50:49 production pppd[1921]: require-mschap-v2#011#011# (from /etc/ppp/options.pptpd)
Oct 12 18:50:49 production pppd[1921]: refuse-pap#011#011# (from /etc/ppp/options.pptpd)
Oct 12 18:50:49 production pppd[1921]: refuse-chap#011#011# (from /etc/ppp/options.pptpd)
Oct 12 18:50:49 production pppd[1921]: refuse-mschap#011#011# (from /etc/ppp/options.pptpd)
Oct 12 18:50:49 production pppd[1921]: name pptpd#011#011# (from /etc/ppp/options.pptpd)
Oct 12 18:50:49 production pppd[1921]: pptpd-original-ip 66.104.246.168#011#011# (from command line)
Oct 12 18:50:49 production pppd[1921]: 115200#011#011# (from command line)
Oct 12 18:50:49 production pppd[1921]: lock#011#011# (from /etc/ppp/options.pptpd)
Oct 12 18:50:49 production pppd[1921]: local#011#011# (from command line)
Oct 12 18:50:49 production pppd[1921]: novj#011#011# (from /etc/ppp/options.pptpd)
Oct 12 18:50:49 production pppd[1921]: novjccomp#011#011# (from /etc/ppp/options.pptpd)
Oct 12 18:50:49 production pppd[1921]: ipparam 66.104.246.168#011#011# (from command line)
Oct 12 18:50:49 production pppd[1921]: proxyarp#011#011# (from /etc/ppp/options.pptpd)
Oct 12 18:50:49 production pppd[1921]: 192.168.97.1:192.168.97.10#011#011# (from command line)
Oct 12 18:50:49 production pppd[1921]: nobsdcomp#011#011# (from /etc/ppp/options.pptpd)
Oct 12 18:50:49 production pppd[1921]: require-mppe-128#011#011# (from /etc/ppp/options.pptpd)
Oct 12 18:50:49 production pppd[1921]: mppe-stateful#011#011# (from /etc/ppp/options.pptpd)
Oct 12 18:50:49 production pppd[1921]: pppd 2.4.5 started by root, uid 0
Oct 12 18:50:49 production pppd[1921]: Using interface ppp0
Oct 12 18:50:49 production pppd[1921]: Connect: ppp0 <--> /dev/pts/1
Oct 12 18:50:52 production pppd[1921]: MPPE 128-bit stateless compression enabled
Oct 12 18:50:52 production pppd[1921]: Unsupported protocol 'IPv6 Control Protocol' (0x8057) received
Oct 12 18:50:52 production pppd[1921]: Unsupported protocol 'Apple Client Server Protocol Control' (0x8235) received
Oct 12 18:50:52 production pppd[1921]: Cannot determine ethernet address for proxy ARP
Oct 12 18:50:52 production pppd[1921]: local IP address 192.168.97.1
Oct 12 18:50:52 production pppd[1921]: remote IP address 192.168.97.10
Oct 12 18:50:52 production pppd[1921]: pptpd-logwtmp.so ip-up ppp0 chris 66.104.246.168
Sono sconcertato ...