8 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Hello, So I was finally able to get mpd5 working as a vpn server, however I am not able to use encryption. I have a feeling it's this entry in the logs, can someone decipher what this means for me & tell me if it can be fixed? I know ng_mppc is related to mchap, but I'm not sure what I'm supposed... (0 Replies)
Discussion started by: dpreviti
0 Replies
2. IP Networking
I try to setup a VPN Server (pptpd on Debian 5) to route an IP to my home PC when i login to the VPN - this works so far, i get the IP but then it is dead.
i cannot connect to anywhere, and only ping my IP - nothing else.
Any info on that?
I just want to have a static, external IP on the... (1 Reply)
Discussion started by: William_E
1 Replies
3. Debian
Dear All
My scenario is
Debian with PPTP Server in which I am able to connect to through other machines. Ive enable echo 1 > /proc/sys/net/ipv4/ip_forward and through client machine i can browse internet as well
I created another pptp client in debian server which connects to another... (0 Replies)
Discussion started by: kazimnaim
0 Replies
4. Emergency UNIX and Linux Support
Hi guys.
I am going to build a Linux VPN server(PPTP) for my friend but here is the problem:
He don't know Linux and command line to manage users, monitor server, etc
anyone knows a good GUI for this problem? I need some solution like nttacplus (2 Replies)
Discussion started by: majid.merkava
2 Replies
5. Emergency UNIX and Linux Support
Hi there.
Here is a crazy question:
can we connect to a L2TP vpn server Through a PPTP VPN server(I mean when connecting to a pptp server)? (1 Reply)
Discussion started by: majid.merkava
1 Replies
6. UNIX for Dummies Questions & Answers
Hi ,
I am a newbie to unix,linux i have a fedora core 4 linux. I had set it up as a pptp vpn client to a windows pptp server. Everything was working fine. Recently i saw that there were many attempts to hack into the root login using ssh. so i changed the ssh port,the ssh portocol to 2. And... (0 Replies)
Discussion started by: qais
0 Replies
7. UNIX for Advanced & Expert Users
Long story short, I have an issue with getting my VPN to connect to my w2k3 server box when I include the block all rule in my pf.conf:
block log all
Here's the output:
Apr 04 06:04:09.291697 rule 1/0(match): block in on hme0: call 3033 seq 0 gre-ppp-payload (gre encap)
Apr 04... (0 Replies)
Discussion started by: xyyz
0 Replies
8. UNIX for Dummies Questions & Answers
Hey guys, what's up? I'm new to UNIX and I really don't know much. Kinda learning as I go along. I have successfully installed FreeBSD 4.9 and enabled FTP and Telnet services. I'm looking to setup a VPN server on my BSD box but I'm lost. Can anyone guide me in the right way? Much thanks!
-... (2 Replies)
Discussion started by: sirex
2 Replies
PPTP(8) System Manager's Manual PPTP(8)
NAME
pptp - PPTP driver
SYNOPSIS
pptp <pptp-server-IP> <pptp-options> [ppp-options] ...
DESCRIPTION
pptp establishes the client side of a Virtual Private Network (VPN) using the Point-to-Point Tunneling Protocol (PPTP). Use this program
to connect to an employer's PPTP based VPN, or to certain cable and ADSL service providers.
By default, pptp establishes the PPTP call to the PPTP server, and then starts an instance of pppd to manage the data transfer. However,
pptp can also be run as a connection manager within pppd.
OPTIONS
The first non-option argument on the pptp command line must be the host name or IP address of the PPTP server.
All long options (starting with "--") are interpreted as pptp options, and a fatal error occurs if an unrecognised option is used.
All command-line arguments which do not start with "-" are interpreted as ppp options, and passed as is to pppd unless --nolaunchpppd is
given.
--phone <number>
Pass <number> to remote host as phone number
--nolaunchpppd
Do not launch pppd but use stdin as the network connection. Use this flag when including pptp as a pppd connection process using
the pty option. See EXAMPLES.
--quirks <quirk>
Work around a buggy PPTP implementation, adopts special case handling for particular PPTP servers and ADSL modems. Currently recog-
nised values are BEZEQ_ISRAEL only
--debug
Run in foreground (for debugging with gdb)
--sync Enable Synchronous HDLC (pppd must use it too)
--timeout <secs>
Time to wait for reordered packets (0.01 to 10 secs)
--nobuffer
Completely disables buffering and reordering of packets. Any --timeout specified will be ignored.
--idle-wait <secs>
Time to wait before sending a control connection echo request. The RFC2637 default is 60 seconds.
--max-echo-wait <secs>
Time to wait for an echo reply before closing the control connection. The RFC2637 default is 60 seconds.
--logstring <name>
Use <name> instead of 'anon' in syslog messages
--localbind <addr>
Bind to specified IP address instead of wildcard
--loglevel <level>
Sets the debugging level (0=low, 1=default, 2=high)
--test-type <n>
Enable packet reordering tests that damage the integrity of the packet stream to the server. Use this only when testing servers.
Zero is the default, and means that packets are sent in the correct order. A value of one (1) causes a single swap between two
packets, such that the sequence numbers might be 1 2 3 4 6 5 7 8 9. A value of two (2) causes ten packets to be buffered, then sent
out of order but ascending, such that the sequence numbers might be 1 2 3 4 16 6 7 8 9 10 11 12 13 14 15 17 18 19 20. A value of
three (3) causes ten packets to be buffered, then sent in the reverse order, like this; 1 2 3 4 16 15 14 13 12 11 10 9 8 7 6 5 17 18
19 20.
--test-rate <n>
Sets the number of packets to pass before causing a reordering test. Default is 100. Has no effect if test-type is zero. The
result of test types 2 and 3 are undefined if this value is less than ten.
QUIRKS
BEZEQ_ISRAEL
modifies packets to interoperate with Orckit ADSL modems on the BEZEQ network in Israel.
EXAMPLES
Connection to a Microsoft Windows VPN Server
pppd noauth nobsdcomp nodeflate require-mppe-128 name domain\\username remotename PPTP pty "pptp 10.0.0.5 --nolaunchpppd"
Note that the chap-secrets file used by pppd must include an entry for domain\username
STATISTICS
The pptp process collects statistics when sending and receiving GRE packets. They are intended to be useful for debugging poor PPTP perfor-
mance and for general monitoring of link quality. The statistics are cumulative since the pptp process was started.
The statistics can be viewed by sending a SIGUSR1 signal to the "GRE-to-PPP Gateway" process, which will cause it to dump them to the sys-
tem logs (at the LOG_NOTICE level). A better way to present the statistics to applications is being sought (e.g. SNMP?).
The following statistics are collected at the time of writing (April 2003):
rx accepted
the number of GRE packets successfully passed to PPP
rx lost
the number of packets never received, and presumed lost in the network
rx under win
the number of packets which were duplicates or had old sequence numbers (this might be caused by a packet-reordering network if your
reordering timeout is set too low)
rx over win
the number of packets which were too far ahead in the sequence to be reordered (might be caused by loss of more than 300 packets in
a row)
rx buffered
the number of packets which were slightly ahead of sequence, and were either buffered for reordering, or if buffering is disabled,
accepted immediately (resulting in the intermediate packets being discarded).
rx OS errors
the number of times where the operating system reported an error when we tried to read a packet
rx truncated
the number of times we received a packet which was shorter than the length implied by the GRE header
rx invalid
the number of times we received a packet which had invalid or unsupported flags set in the header, wrong version, or wrong protocol.
rx acks
the number of pure acknowledgements received (without data). Too many of these will waste bandwidth, and might be solved by tuning
the remote host.
tx sent
the number of GRE packets sent with data
tx failed
the number of packets we tried to send, but the OS reported an error
tx short
the number of times the OS would not let us write a complete packet
tx acks
the number of times we sent a pure ack, without data
tx oversize
the number of times we couldn't send a packet because it was over PACKET_MAX bytes long
round trip
the estimated round-trip time in milliseconds
SEE ALSO
pppd(8)
Documentation in /usr/share/doc/pptp
AUTHOR
This manual page was written by James Cameron <james.cameron@hp.com> from text contributed by Thomas Quinot <thomas@debian.org>, for the
Debian GNU/Linux system. The description of the available statistics was written by Chris Wilson <chris@netservers.co.uk>. Updates for the
Debian distribution by Ola Lundqvist <opal@debian.org>.
PPTP(8)