similar to: How to diagnostic UDP discovery failed situation

I found the server(1.1.1.1) didn’t receive the MTU probe from client, so I add iptables -A INPUT -p udp —port 443 -j ACCEPT. After this, I see one packet matching on the server side, and the MTU negotiation works, but when I tear down the tinc, and re-establish the tinc connection, the counter of below UDP/443 never increase, and also my other tinc nodes never add this statement on iptables, but

Hi all, I am currently deploying tinc as an alternative to OpenVPN. My setup includes a lot of nodes and some of them are sitting together behind the same router on the same network segment. (E.g. connected to the same switch.) I noticed, that those nodes do never talk directly to each other via their private ip-addresses, but instead use the NATed address they got from the router.

Hi, All Due to some routing rotation purpose, I use crontab to add below info: 0 * * * * echo Subnet = 54.169.128.0/17 >> /etc/tinc/myvpn/hosts/aws_sgp 0 * * * * echo Subnet = 54.169.0.0/17 >> /etc/tinc/myvpn/hosts/aws_sgp 1 * * * * /usr/sbin/tincd -n myvpn -k 1 * * * * /usr/sbin/tincd -n myvpn --debug=3 30 * * * * sed -i '/54.169.128.0\/17/d' /etc/tinc/myvpn/hosts/aws_sgp

Tinc team: I'm creating a vpn for my work laptop and vps and got trapped, here are my config files: on laptop: *tinc.conf Name = envy13 Device = /dev/net/tun ConnectTo = main *hosts/main Address = <my vps ext ip address> Port = 655 Subnet = 10.0.0.1/32 *hosts/envy13 Port = 655 Subnet = 10.0.0.2/32 *tinc-up #!/bin/sh ip link set myvpn up ip addr add 10.0.0.2/32 dev myvpn ip route add

Hi, Guus Thanks a lot for your suggestion, actually I did something else as below. But one question here is if I don’t add "/sbin/ifconfig myvpn 10.0.0.1 netmask 255.255.255.0”, it seems the crontab wouldn’t trigger tinc-up, and then the ip addr of myvpn wouldn’t be configured, then it will prompt the error of "Can't write to Linux tun/tap device (tun mode) /dev/net/tun:

Hello, Since the present tinc documentation is not very clear about this, please explain the following: is it mandatory to include the local IP address classes in the global VPN address class? Namely, please consider the following setup (which works great in practice): 1. A tinc VPN, full mesh, with n nodes (n > 3) 2. tinc runs on the firewall, which is also the default gateway for each

1. Is there any tools/command, we can show the subnet where a certain tinc nodes learnt? So that I can know the weight for certain subnet(in real time), instead of go back to the node’s (who advertise the subnet) configuration file to check. 2. So far in order to change the weight of a subnet, or something else, I have to reset the tinc daemon( tincd -k -n myvpn and then tincd -n myvpn) in

Hi all, I'm back again with my speed issues. The past issues where dependant of network I used. Now I run my tests in a lab, with 2 configurations linked by a Gigabit switch : node1: Intel Core i5-2400 with Debian 7.2 node2: Intel Core i5-3570 with Debian 7.2 Both have AES and PCLMULQDQ announced in /proc/cpuinfo. I use Tinc 1.1 from Git. When I run an iperf test from node2 (client) to

Hi, Tinc experts Diagram as below, A is trying to access host X behind C: A >> B >> C — “host X" B is the tinc server for A, but also B is the tinc client to connect to C. My question is, if I only use one VPN (/etc/tinc/myvpn), then the host configuration for B will be tricky. As the tinc server to A, B’s host config (/etc/tinc/myvpn/hosts/B) needs have the Subnet = X/32,

Hi Tinc Groups again, Now i can set syslog. But my problem still the same. When i check Tap0 configure. I know idea what's wrong that i set. I set up tap follow these. ifconfig tap0 hw ether fe:fd:00:00:00:00 ifconfig tap0 192.168.1.1 netmask 255.255.255.0 ifconfig tap0 -arp But i notice in my routing table have 2 myvpn. Like these, myvpn * 255.0.0.0

There is no concept of "client" or "server" in tinc. tinc is purely peer-to-peer. "ConnectTo" statements only indicate which node will attempt to establish the initial connection, but once the connection is established, direction does not matter. It is unclear from your message which node is responsible for which subnet. If X/32 truly belongs to C, then simply set

Hi, Etienne In addition, is there any option or switch can turn of the automatic direct connection? For the example below, even A has the route to C and can establish UDP connection directly, but I need the traffic to go through B, how can I achieve that easily? (instead of remove something from A’s routing table, or manually block the connection between A and C) > On 1 May 2017, at 6:28 PM,

Hi all, thanks for making Tinc available - it works well and I managed to get a decent configuration going in only a few hours, great :) I am building a VPN for my cloud servers (hosted at DigitalOcean, they use Linux and KVM). I am on Ubuntu 12.04 with Kernel 3.0.8-36, and tinc is at version 1.0.16. From a functional point of view, everything works like a charm! But I am wondering, if there is

Hi. I'm in desperate need of some good advice. I have a tinc network with 16 nodes. It's a star topology where all nodes are connecting to the one node (Node1) that have a static IP. Node 1 accepts incomming connections Node 2 through 16 connects to Node1 One of the nodes (Node5) stopped working a while ago (2 - 3 weeks or so), other than that everything was working fine. Today I

Hi, Etienne I took a look for the below host configuration parameter (IndirectData), the default is no. For the below example: A ConnectTo B, B ConnectTo C: If IndirectData = no (default), then A wouldn’t establish direct connection with C, but will be forwarded by B. If IndirectData = yes, then A will try to establish direct connection with C, even though A don’t have the statement of

Hello, I have been reading through the documentation and trying to set up a very small VPN as a test for a larger rollout that I would like to complete in the future but cannot get this working. The configuration seems like it should be relatively simple, so I'm most likely missing something basic but I just cannot see what I'm doing wrong. At the moment I am trying to get this working

Dear Guus, while improving the PMTU Discovery algorithm, I found the following behavior in the method "send_udppacket": 1) The code checks, whether the data size is smaller than the MTU, thus if it fits into a single UDP packet. If not, you send the packet via TCP. 2) The data is compressed, changing its size. (Usually, making it smaller, but that's not always

Howdy Folks, I've got a 5 node setup here. My server "home" is the primary server that all other servers connect to. The configs on all the servers look like this: # cat /etc/tinc/home/hosts/node1 Subnet = 10.2.0.0/16 Address = 192.168.2.1 <RSA KEY> # cat /etc/tinc/home/hosts/node2 Subnet = 10.3.0.0/16 Address = 192.168.3.1 <RSA KEY> Etc. All the hosts are setup

Hi, All Recently, one of my tinc client always suffer connection drop, I was suspect the connection was not stable to cause this issue, and BTW, I’ve set the PingTimeout to 10 seconds already, but this situation still happens a lot sometimes, but when the connection drop happens, the connection recovery pretty fast, normally in a minutes. In order to deep dive into the cause, or proven the

Hi Guus, while checking the source code, I stumbled upon PMTU Discovery. I've got a question regarding the process of sending/receiving PMTU packets. As I understand, the packet flow is like this: 1 .Tinc creates a packet with a specific payload length to send it as an PMTU probe. (The data part is just some random bytes.) 2. This packet gets compressed and sent