Recent Questions

This happens to me quite a lot, and I'd like to know if there's a way to prevent it or a better way to fix it than restarting my computer. The circumstances are very different to existing questions like “DNS server address couldn't be found” for some websites; it goes like this: I tu on my computer (Windows 8.1) and inteet router (which is either a 3G mobile router that I'm waking up from sleep, or a normal wireless router and modem that isn't on all the time because I'm in a country where there...

My Postfix server was working fine until last days but now, I can't receive emails from outside (I mean with an email of different domain name like gmail for example). I must make notice that I can send email from the server to gmail. From what I have seen, I think that issue may be my iptables rules : # iptables -L Chain INPUT (policy DROP) target prot opt source destination ACCEPT tcp -- anywhere anywhere tcp dpt:ssh ACCEPT all -- ...

I am running Ubuntu 16.04 LTS and am using Vagrant to run a Ubuntu 14.04 Server with a LAMP stack setup. I am working on a Laravel 5.2 project, but constantly have issues with the permissions in the storage folder/sub-folders. Currently, the folders are owned by my user/group. Anytime some file needs to be created or written too, I get a permission denied error. I can fix this with by chmoding the files to 777. This however does't fix the issue of having the problem when a new file is made (for ...

I have a home network built around an ancient computer that I've tued into a router, running Debian Wheezy. The wireless part is based on a TP-LINK TL-WN851ND PCI card on the hardware side, and uses hostapd on the software side. Now, I have recently obtained a new phone, on which I am running CyanogenMod 12.1 (equivalent to Android 5.1). This device can connect to my wireless network, but most network operations (e.g. downloading things) result in timeouts, requiring retries. Fetching emails ove...

I am trying to setup an OpenVPN server on my desktop that I will connect to on my laptop (both running windows 8.1 64-bit, with the 64-bit versions of OpenVPN installed). The setup procedure calls for the easy-rsa package, which is no longer included with OpenVPN, but is available separately. I have installed easy-rsa version 3.0.1. The first step in the setup is to run "init-config" in command prompt in the directory "C:Program FilesOpenVPNeasy-rsa", but it fails, giving me the typical "not rec...

When iPhone is plugged in computer running Windows 10 it starts installing drivers. Windows doesn't show UAC screen, or user permission to install drivers. Sure, it is convenient, but what is the security model here? Does it mean that any usb stick can silently gain permission for arbitrary code execution? Or this usb stick would needs a signed certificate to do so? Let's block ads! بخوانید...

My server is under attacked by exim brute force with a fake ip: 2014-05-31 16:05:09 login authenticator failed for ([my_public_ip]) [178.41.179.50]: 535 Incorrect authentication data (set_id=grey) I have some rules to block the origin 178.41.179.50 ip but no success. I try to block the incoming traffic with fake source with my public ip like this: iptables -A INPUT -i eth0 -s my_public_ip -j DROP But it seem take resolve my public ip to DNS instead.So it does not work. Any help ? Let's blo...

I have a dial-up connection with a provider whose DNS server is offline erratically. When I change my DNS using the usual method with the Network and Sharing Center to Google DNS, it asks me to reconnect to apply the changes, but when I do so, everything is cleared. I have also used an app called DNS Jumper but that didn't work either. I would appreciate it if anyone could help me solve this issue. Thanks in advance. Let's block ads! بخوانید...

As the Preferred DNS Server, I found three options; either 127.0.0.1 (loopback address) or 8.8.8.8 or IP address assigned to the server. What should I use for the Preferred DNS Server IP for a new DNS Server or for a new forest? And Why Loopback address is used as the Preferred DNS Server? Please resolve my above queries. Regards GNS Let's block ads! بخوانید...

Issue I'm following this great how-to and all goes well until packer needs to shutdown the newly provisioned which fails with Cannot unregister the machine 'packer-virtualbox-iso-1469510168' while it is locked. See full log below at the end of this question. I've done the following Check no stale VirtualBox VMs are left around with that name (all clear) Update VirtualBox to latest available (5.1.2 r108956) Reboot my host computer but this consistently happens. Environment Host OS - OS X El Capit...

Using the developer tools in Firefox one can see detailed information about requests to and responses from the webserver (HTTP header and content, timing information, status codes and so on). I wonder if there's a possibility to also see similar request loggings for the DNS resolving somewhere that are done before the HTTP protocol even takes over? Or is this handled outside the browser (by some operating system component for example)? Let's block ads! بخوانید...

Is there is a fix for this apparent bug? My computer is using a static IP address, but registers itself automatically with dynamic DNS. If I change the list of DNS servers configured (even just reorder or put in only one of the servers as long as it's different from what was there before) then reboot the machine, the DNS entry gets deleted. This seems like a flaw in the design of dynamic DNS (at least in the Windows implementation). If I run ipconfig /registerdns, it does add the entry back. But...

I'd really like to know if dsniff package as available in Linux is available for Windows environments? Or is there any way I can compile dsniff for Windows and generate executables to do the task? Or are there any similar tools available? Which allow us to generate custom network packets/replay given packets? I know Cygwin is an option, but I'd like to know if there is any tool for Windows. Also, would I need WinPcap for that? Let's block ads! بخوانید...

I have a windows server 2012 R2 box running as my domain controller and I am having some trouble with DNS. I have DNS records setup on the DC for a few sites that we want to have the inteal IP different than the exteal IP. Our main DNS records are on godaddy.com. So for example the DNS record on the DC would be set to 192.168.1.2 mx.foo.com and the one on godaddy would be 173.12.58.1 mx.foo.com. This works fine but the problem I am having is if I make a new DNS record on godaddy the Domain Contr...

When dhcp client contacts dnsmasq's dhcp server to assign ip address, is there a way to send some file to dhcp client using built-in tftp server? dnsmasq.conf file contains following tftp related to info: # Enable dnsmasq's built-in TFTP server enable-tftp # Set the root directory for files available via FTP. tftp-root=/var/ftpd But, I am not sure how to transfer some file using above mentioned information in dnsmasq.conf file to dhcp client (and the location where it should be copied to dhc...

im trying to setup some dns/ptr records for my home network lab, right now i have entry's of "computer1.lab.local" or computer2.lab.local, and im trying to configure my dns to put entry like computer1.lab.local > dhcp-192-168-1-12.lab.local computer2.lab.local > dhcp-192-168-1-13.lab.local i've seen some companies and businesses do that but im not sure how thats done, anyone here know?? This entry passed through the Full-Text RSS service - if this is your content and you're reading it on...

I am running BIND 9.10.3-P4-Ubuntu as an authoritative server for my own domains and to serve DNS for machines in my network. My problem: I am unable to resolve www.cnn.com. All other domains seem to work fine. I realize that there are work-arounds, but I am trying to lea and understand. This problem has me stumped. dig www.cnn.com results in a SERVFAIL (full results below) but... dig www.cnn.com +trace gives an answer (full results below) I have debug logging tued on (results below) but...

Is there a relation between a data compression format (zip, gzip, bzip2, etc.) and it's ability to ease in recovering broken data? I want to store some backups (like tar.gzs) but then I started wondering what could happen if the archive somehow becomes corrupt, like when changing a single bit randomly. Will the entire file become useless or are there mechanisms to minimize damage? Most information I find is purely about storage efficiency and they never seem to mention possible corruptions... Le...

Not a single advice i have came across helped me so far, you are my only hope guys. I registered a free certificate from startssl, and tried to install it on my postfix server. OpenSSL confirms that my private key matches the certificate, unencrypted key is chowned by Postfix user, and all other files are loading pretty well. However, whenever I either send mail, receive mail, or connect through telnet i get message in logs saying cannot get RSA private key from file /etc/postfi/ssl/mydomain.ke...

I am running two HD 7970s in crossfire on my windows 10 rig. Through afterbuer I can see that both cards are working in tandem when bench marking and in most games. However, I have noticed in a few games, Skyrim mainly, that only the master is utilized when playing. The slave card usage does jump up a little bit when first loading different areas, however, it quickly drops back to zero and stays there. Are there some games that just can't use crossfire? Is there some setting I am unaware of? Le...