X-Git-Url: https://tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=README;h=195946b9c42d8ff69414a670d3bce85e8fc2cbdd;hp=7c0fe125e0608ce16ee6b02b78959892be0c88dd;hb=52575a573c1d87ee125a54a2e0b4044698904cae;hpb=f18e30dab3c208fd353af11e365791035534f444 diff --git a/README b/README index 7c0fe125..195946b9 100644 --- a/README +++ b/README @@ -1,5 +1,5 @@ -This is the README file for tinc version 1.0. -Installation instructions may be found in the INSTALL file. +This is the README file for tinc version 1.0pre3. Installation +instructions may be found in the INSTALL file. tinc is Copyright (C) 1998,1999,2000 Ivo Timmermans , Guus Sliepen and @@ -11,6 +11,22 @@ the Free Software Foundation; either version 2 of the License, or (at your option) any later version. See the file COPYING for more details. +Security statement +------------------ + +In august 2000, we discovered the existence of a security hole in all +versions of tinc up to and including 1.0pre2. This had to do with the +way we exchanged keys. Since then, we have been working on a new +authentication scheme to make tinc as secure as possible. The current +version uses the OpenSSL library and does authentication in much the +same way as the SSH protocol does. + +Cryptography is a hard thing to get right. We cannot make any +guarantees. Time, review and feedback are the only things that can +prove the security of any cryptographic product. If you wish to review +tinc or give us feedback, you are stronly encouraged to do so. + + Requirements ------------ @@ -30,18 +46,21 @@ use this feature, you may supply a netname via the -n or --net options. The standard locations for the config files will then be /etc/tinc//. Because of this feature, tinc will send packets directly to their destinations, instead of to the uplink. If this -behaviour is undesirable (for instance because of firewalls or -other restrictions), please use an older version of tinc (I would -recommend tinc-0.2.19). +behaviour is undesirable (for instance because of firewalls or other +restrictions), please use an older version of tinc (I would recommend +tinc-0.2.19). -In this version, MAC addresses are stripped off before encoding and -sending a packet. When the packet reaches its destination, the MAC -addresses are rebuilt again. They then have the form -FE:FD:aa:bb:cc:dd. aa, bb, cc and dd are taken from the destination -and source IP address. See the manual for more detailed information. +In order to force the kernel to accept received packets, the +destination MAC address will be set to FE:FD:00:00:00:00 upon +reception. The MAC address of the ethertap or tun/tap interface must +also be set to this address. See the manual for more detailed +information. tincd regenerates its encryption key pairs. It does this on the first activity after the keys have expired. This period is adjustable in the -configuration file, and the default time is 3600 seconds (one -hour). If you send a USR2 signal to the daemon, it'll regenerate -immediately. +configuration file, and the default time is 3600 seconds (one hour). + +This version supports multiple subnets at once. They are also sorted +on subnet mask size. This means that it is possible to have +overlapping subnets on the VPN, as long as their subnet mask sizes +differ.