Recent Questions

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 -- anywhere anywhere state RELATED,ESTABLISHED ACCEPT all -- anywhere anywhere ACCEPT tcp -- anywhere anywhere tcp dpt...

I am ruing 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 sessions). I could set the files/folder to inherit permissions of 777. This is fine for a development server I suppose, but I would like to do this the right way, not just the fast way. What permissions...

I have a home network built around an ancient computer that I've tued into a router, ruing 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 ruing CyanogenMod 12.1 (equivalent to Android 5.1). This device can coect to my wireless network, but most network operations (e.g. downloading things) result in timeouts, requiring retries. Fetching emails over IMAP is particularly terrible, almost invariably resulting in timeout exceptions. If a coection succeeds, it's fast, but getting the coection to succeed is problematic. It is only on this network that I'm...

I am trying to setup an OpenVPN server on my desktop that I will coect to on my laptop (both ruing 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 recognized as an inteal or exteal command, operable program or batch file" error. Is there something else i'm missing or need to install? Let's block ads! بخوانید...

When iPhone is plugged in computer ruing 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...

You don't need to reserve any space, but the less space you use the longer the SSD will last - the logic for spreading out writes is spread evenly over the disk by the drive (ie wear leveling is not an OS or file system level thing). Further, you should not need to worry too much about wear on a decent quality SSD on typical workstation loads - the number of read-write cycles is quite high. Its generally a good idea to at least 10% and preferably 20% of a partition free from a point of view of speeding up writes and reducing fragmentation - this is, however, less important in an SSD then a hard drive as SSD's barely suffer from fragmentation issues. Other things to bear in mind when purchasi...

Issue I'm following this great how-to and all goes well until packer needs to shutdown the newly provisioned which fails with Caot 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 Capitan 10.11.5 VirtualBox - 5.1.2 r108956 Packer - 0.10.1 Boxstarter - Current Master (last commit eb1cd9f86a2a8b1ee54cc14cc2c23ace93e01b96) Log 2016/07/26 15:33:26 ui: ==> virtualbox-iso: Unregistering...

Would choosing between SHA-512, RIPEMD-160, or Whirlpool have any impact on the actual performance of a truecrypt partition once it's mounted or not? Thank you ...

To make this simple: When I try to play Overwatch (or any game, using Overwatch as the example) on my Lenovo Y570 on its own LCD, it averages about 30 FPS, with the sound quality going down with it, until the sound is audibly slideshow-ing. However, when I hook up a Lenovo P2770HD laptop and output my video there, I easily hover around 60 FPS. What interests me most is that the resolution increases, so that's not an issue (1366x768 -> 1920x1080). Completely dumbfounded as to what could possibly cause this. All the info you need to know about my computer: http://pastebin.com/Prs6DZSq Let's block ads! بخوانید...

In an indoor environment, I have more than 10 clients are coecting to an AP, pinging 50000 byte of packet size. Then I add another 10 clients, pinging 50000 byte of packet size. After ruing few hours, start to see 3-4 devices encountered tx-ccq low % (eg. 1 - 5%). I tested the AP with LANforge tool, it can support up to 50-60 concurrent users. However, this is not tally with what I tested in real environment. Not sure what is the root cause of this dropped tx-ccq issue. Any idea to improve the multiple unicast performance in this AP? Any advise is appreciated. Let's block ads! بخوانید...

I have postgres 9.3 on win7. I have fixed ability to login (md5 fix in configuration) and now I would like to tweak the performance. Give the service more resources (more RAM). How do I do that? (either editing config and restarting or I also have pgAdmin III installed). Let's block ads! بخوانید...

I have 16G ram and 2T hard drive, then added 120G Samsung SSD as new boot C: (had shop do it) and 2 things happened. The performance was much better for Win boot, but sometimes on opening a drive or a directory that green bar that paints on top of the box would take a minute maybe even 4 mins to slowly paint. Other times no issue at all, fast. At the same time Search all of a sudden would miss both files and directories that were actually there. Think the 2 are related.Image Of Slow Green Bar Anyone have same issue, whether relate to or not a SSD addition? Any thoughts on a solution? Took it back to shop twice, they could not figure it out, besides the fact they set directories to "Videos" f...

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... Let's block ads! بخوانید...

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 coect through telnet i get message in logs saying caot get RSA private key from file /etc/postfi/ssl/mydomain.key.unencr I am all out of ideas. Postfix conf: smtpd_tls_cert_file=/etc/postfix/ssl/mydomain.net.crt smtpd_tls_CAfile=/etc/postfix/ssl/root.crt smtpd_tls_key_file=/etc/postix/ssl/mydomain.net.key.unenc...

I am ruing 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? Let's block ads! بخوانید...