Getting “Cannot ioctl TUNSETIFF tun: Operation not permitted” when trying to connect to OpenVPN
Looks like this is a simple matter of sudo. sudo openvpn client.ovpn worked a treat.
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Monday morning mistake: sudo rm -rf –no-preserve-root /
Boot into the rescue system provided by Hetzner and check what damage you have done. Transfer out any files to a safe location and redeploy the server afterwards. I’m afraid that is the best solution in your case.
Is it possible to generate RSA key without pass phrase?
If you are generating a self signed cert, you can do both the key and cert in one command like so: openssl req -nodes -new -x509 -keyout server.key -out server.cert Oh, and what @MadHatter said in his answer about omitting the -des3 flag.
How to add dependency on a Windows Service AFTER the service is installed
This can also be done via an elevated command prompt using the sc command. The syntax is: sc config [service name] depend= <Dependencies(separated by / (forward slash))> Note: There is a space after the equals sign, and there is not one before it. Warning: depend= parameter will overwrite existing dependencies list, not append. So for … Read more
How can I read pcap files in a friendly format?
Wireshark is probably the best, but if you want/need to look at the payload without loading up a GUI you can use the -X or -A options tcpdump -qns 0 -X -r serverfault_request.pcap 14:28:33.800865 IP 10.2.4.243.41997 > 69.59.196.212.80: tcp 1097 0x0000: 4500 047d b9c4 4000 4006 63b2 0a02 04f3 E..}..@[email protected]….. 0x0010: 453b c4d4 a40d 0050 … Read more
Are SSD drives as reliable as mechanical drives (2013)?
This is going to be a function of your workload and the class of drive you purchase… In my server deployments, I have not had a properly-spec’d SSD fail. That’s across many different types of drives, applications and workloads. Remember, not all SSDs are the same!! So what does “properly-spec’d” mean? If your question is … Read more
What is the difference between Load Balancer and Reverse Proxy?
Your confusion is reasonable – they are often the same thing. But not always. When you refer to a load balancer you are referring to a very specific thing – a server or device that balances inbound requests across two or more web servers to spread the load. A reverse proxy, however, typically has any … Read more
DNS – NSLOOKUP what is the meaning of the non-authoritative answer?
Basically, it’s what the name says it is. An authoritative answer comes from a nameserver that is considered authoritative for the domain which it’s returning a record for (one of the nameservers in the list for the domain you did a lookup on), and a non-authoritative answer comes from anywhere else (a nameserver not in … Read more
Top level domain/domain suffix for private network?
Since the previous answers to this question were written, there have been a couple of RFCs that alter the guidance somewhat. RFC 6761 discusses special-use domain names without providing specific guidance for private networks. RFC 6762 still recommends not using unregistered TLDs, but also acknowledges that there are cases where it will be done anyway. … Read more
How bad is IPv4 address exhaustion really?
It’s very bad. Here is a list of examples of what I have first hand experience with consumer ISPs doing to fight the shortage of IPv4 addresses: Repeatedly shuffling around IPv4 blocks between cities causing brief outages and connection resets for customers. Shortening DHCP lease times from days to minutes. Allow users to choose if … Read more