Hey everyone,
So, I’ve been messing around with tun2tap for a while now, trying to get it to work for some network tunneling stuff. Anyone here actually got it running smoothly?
I’m kinda stuck at the moment—like, it *seems* to work, but then packets just vanish into the void or something. Am I missing a config step? Or is it just finicky af?
Also, is tun2tap even the best tool for this? Or should I just ditch it and try something else? Would love to hear if anyone’s got tips or hacks to make it less of a headache.
Thx in advance!
Hey! I feel your pain with tun2tap. It can be a real headache sometimes. I had the same issue with packets disappearing—turns out I forgot to set the MTU correctly on the tap interface.
Try running `ifconfig tap0 mtu 1400` (or whatever your tap interface is called) and see if that helps. Also, double-check your routing tables. Sometimes packets vanish because they’re not being routed properly.
If you’re still stuck, maybe give `tunctl` a shot? It’s a bit simpler than tun2tap for basic tunneling. Good luck!
tun2tap is definitely finicky, but it’s worth the effort if you get it right. I’d recommend checking out this guide: [link to a tun2tap guide]. It walks you through the config step-by-step.
Also, make sure your firewall isn’t blocking the traffic. I spent hours troubleshooting only to realize iptables was silently dropping packets. 🙃
If you’re open to alternatives, OpenVPN with tap mode might be easier to set up for your use case.
Yo, tun2tap is a beast, but once you tame it, it’s solid. The packet vanishing thing is usually a routing issue. Run `tcpdump` on both ends to see where the packets are getting lost.
Also, check if your kernel supports tun/tap properly. Some distros need extra modules loaded.
If you’re done with the hassle, maybe try WireGuard? It’s way simpler and faster for most tunneling needs.
Honestly, tun2tap is a bit outdated imo. I switched to `socat` for most of my tunneling needs, and it’s been way less frustrating. You can do something like `socat TUN:192.168.1.1/24,tun-type=tap -` and it just works.
But if you’re set on tun2tap, make sure your tap interface is up and running before you start sending traffic. Sometimes it’s the little things.
Thanks for all the tips, everyone! I tried adjusting the MTU and running tcpdump, and it looks like the packets are getting lost at the tap interface. I’ll double-check the routing tables and permissions next.
Also, I’m curious about WireGuard and ZeroTier—anyone have experience using them for similar setups? I might give them a shot if tun2tap keeps being a pain. Appreciate the help!
tun2tap can be a pain, but it’s powerful once you figure it out. I had the same issue with packets disappearing, and it was because I didn’t set the IP address on the tap interface correctly.
Try this:
`ifconfig tap0 192.168.1.1 netmask 255.255.255.0 up`
Then check your routes with `ip route`.
If you’re still stuck, maybe try `sshuttle`? It’s not the same as tun2tap, but it’s great for tunneling and way easier to set up.
I feel you, tun2tap is a bit of a black box sometimes. One thing that helped me was running it in verbose mode (`-v` flag) to see where it’s failing. Also, make sure your tap device has the right permissions—sometimes it’s a simple permission issue.
If you’re open to alternatives, check out `ZeroTier`. It’s not tun2tap, but it’s super easy to set up and works great for network tunneling.
tun2tap is tricky, but it’s doable. The packet vanishing thing is usually a routing or ARP issue. Try running `arp -a` to see if your devices are talking to each other properly.
Also, make sure your tap interface is bridged correctly if you’re using it in a VM or something.
If you’re done wrestling with it, maybe give `SoftEther` a try. It’s a bit more user-friendly for tunneling.
