Pppd lcp timeout sending config-requests mac
This indicates a faulty peer implementation. Solution : enable debug mode, start the tunnel manually, and look for the cause of the problem in the output. Check the rest of this document. See below for one known cause. Compression methods. These methods are not supported for two reasons - they are patent-encumbered, and they cause some packets to expand slightly, which pppd doesn't currently allow for. BSD-Compress is also patent-encumbered its inclusion in this package can be considered a historical anomaly :- but it doesn't ever expand packets. Neither does Deflate, which uses the same algorithm as gzip.
Symptom : on kernel 2. Diagnosis : the MPPC patch to pppd is not compatible with kernel 2. Solution : either downgrade to the previous kernel or re-emerge ppp without the mppe-mppc flags. Solution : examine the routing table using netstat -rn before and after the tunnel becomes active. We list some possible reasons and actions that can be taken: Possible Reason Action 1.
Solution : manually restrict the MTU on the interface, by adding mtu or some smaller value as an option to the pppd program, either in the peers file for the tunnel, in the options file, or on the command line.
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You can also restrict the MTU on the interface after the tunnel has connected, using a command like ifconfig ppp1 mtu This may prevent path MTU discovery from being necessary. Double-click the connection to try again. Concentrate on block-box analysis using tcpdump at the end points you have access to. PPP 2. It is then up to the server what level of encryption is adopted. A client cannot require a method of authentication of itself, but it can refuse a method offered.
The "require" forms of these options are intended for use by servers, and if used on a client will force authentication of the server by the client, which will generally fail. ConfReq Proposal These options and values are desired. These options and values are acceptable. The ConfAck reply will contain the options and values.
All the options are recognised by the peer, but some of the values in the options are unacceptable. The ConfNak reply will contain the options that were unacceptable, but with values that are acceptable. The options are not recognised or not acceptable for negotiation by the peer e. The ConfRej reply will contain only the options that are unacceptable.
On receipt of a ConfRej, the local system must not include the options in any following ConfReq. By comparing the packets with what should be happening, you may determine what the cause of a problem might be. Then, in another window or console, start the tunnel.
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Start tcpdump in one window:. Internet addresses of your client and server, usernames and passwords are included in a binary tcpdump. This information may allow someone to gain equivalent access to protected networks. If you do not want to give away this information, convert it to text and remove it before sending the log to someone else.
Usernames and passwords from your chap-secrets file may be included in the debug log if you are using the old ppp-mppe package. If you do not want to give away this information, remove it before sending the log to someone else.
Or, if the problem is occuring after a successful connection report: pppd call tunnel logfd 2 nodetach debug dump. The tunnel can be started in a way that will wait for the first packet to be sent before it establishes the connection to the server. This is called "demand" mode. See our diagram for how it works.
You must start the tunnel using the pppd command rather than pptp. If you normally have to define specific routes to have the tunnel work to your satisfaction, you will have to define these routes once the PPP interface for the tunnel is created, even though the tunnel is not yet connected. Otherwise, packets that should start the tunnel will be sent out the normal interface instead of the tunnel interface.
The persist option can also be used. This causes the tunnel to be retried if it disconnects. Also check the maxfail option, as the default 10 usually causes the tunnel to eventually stop.
Use 0 to say that it should never give up, but remember that this could cause huge amounts of data flow over a long time if the tunnel ever fails in a way that causes PPP to keep trying. The pptpconfig GUI cannot be used for demand mode, as of , because it does not set up the routes before starting the pppd process, and it does not show the log of the connection attempt until it succeeds.
However, despite these restrictions, if you wish to try it, type demand in the Options for pppd field on the Miscellanous tab, then start the tunnel. Reworked root privilege advice following mail from Peter Young. Added new solution for MPPE required but peer negotiation failed involving a recent patch to pppd. I expected that it should come to ether1 instead. However, I cannot decide if it is OK or wrong, and if for example some route is missing from pppoe to eth1 etc.
Probably it OK, is it? The PPPoE interface is the one that actually receives the traffic. So any tracing, firewall settings, etc should be done only on the PPPoE interface.
When you like you can put a "drop" rule on all traffic on ether1 input and forward and you will see that it remains at 0. The only exception is when you can manage your provider's router via your MikroTik, that traffic will be via ether1. The above also means that you need to change the default "drop all new traffic from ether1" rule in the MikroTik firewall set to set the input interface to your PPPoE interface because that is where the internet traffic arrives.
Eventually we found ISP guys and me that the problem is on my iphone. It means not only discontinued support of VPN connection made directly from iphone to VPN server, but it seems that hotspot created on iphone somehow filters GRE protocol before handing it traffic over to mobile network.
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Currently I configured L2TP server that is supported by Apple and is successfully transported via hotspot enabled on iphone and mobile network without limitations. Thanks to You all for help.
Re: PPTP connection failing with LCP timeout
Who is online Users browsing this forum: No registered users and 24 guests. Plugging the phone line into my mac and using PPP with similar settings resulted in an audible modem handshake, but after that, it failed. The PPP error log pasted in full below had these lines which seemed to indicate the software PPP handshake was where it was going wrong:.
In the end, I found a workaround after much googling - there are many phrases in the error log that pop up in various packages, so it wasn't easy. A big hand to Lonesome Amoeba where I finally found a good description, and a workaround. In short: turn 'Connect using a terminal window' on. This leads to an empty dialog with a single 'ok' button when the modems have done their hardware handshake, but PPP is yet to begin. After clicking ok, the dialog disappears, and PPP succesfully connects.
Weird, very un-maclike, but at least it gave me connectivity up there in the mountains.