Recent Questions

Let's say I work for XYZ Ltd and our email addresses are [email protected] . I have three colleagues [email protected]. [email protected], [email protected] . However I get spam with spoofed sender addresses say (apparently) from [email protected] and [email protected] and other obviously randomly generated names. So can I create an Outlook rule to only allow the three or four valid names from the domain and spam folder the rest? Let's block ads! بخوانید...

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 want to create an Outlook mail rule for every company that I deal with so that @xyzcompany.com goes to xyz company folder and @abccompany.com goes to abcompany etc.. without creating a rule for each one. It would have to create folders for new companies that I haven't dealt with. If anyone has any ideas I would be most grateful. Let's block ads! بخوانید...

I'm using FastMail & have a reseller account with which I hope to use one day to manage clients' email accounts. Each account will have 1 Inbox & will allow the creation of multiple aliases on their domain, all of which get delivered to the single inbox. FastMail has a rule-based filing system which will route messages addresses to an alias to a specific folder created to hold messages sent to each alias. However it's not possible to duplicate and copy messages sent to multiple aliases t...

I am wanting to grep for 192.168.22.xxx and 192.168.23.xxx. with a single grep statement where xxx can be any number. I have tried grep -Eo '192.168.2[2][3].[0-9]{1,3}' and grep -Eo '173.235.2[2][3][.][0-9]{1,3}' But this does not retu anything. What is the correct regex I need to be using? Let's block ads! بخوانید...

Typically I'm using MikroTik embeded routers, they're basing on Linux so their firewall settings feel pretty much 1:1 the same as iptables, just commands are a bit different but mechanics the same. Some more advance MTK firewall functionality with raw iptables can be achieved using -m extensions - like connection states or comments for example. I can't find disable option in raw iptables. Is there any iptables extension that allows to temporarily disable iptables rules? By temporarily I mean dis...

I'm trying to crate a mail filerting rule (Outlook 2010) which moves mail from a given sender into a given folder. My observation, though, is that I can only add senders which are in my address list. I can enter a freeform text in the Search field, but if that item is not found in the address list (in the image, I have selected GAL, but even if I select "All"), then it cannot be added to the list of recipients to whom the rule applies. The From button never becomes highlighted. The OK button bec...

I have an interactive system with a computer running Windows 10 in the center. There is no wireless network, only one etheet cable. There is an application running on this machine that sends data to let's say 192.168.10.100. There can be many different computers connected to the central computer, but only one at a time. After pluging in, the computer should receive an IP address (192.168.10.100) and netmask and immediately start receiving data with as little configuration on their side as possib...

I have network with a range 10.0.0.0/24. This means I have 10.0.0.0 to 10.0.0.255, however I cannot use 10.0.0.0 or 10.0.0.255, but I can use anything between that. Why is this? The mask 255.255.255.0 implies that the last digit is the host address, so why can't i use 0 or 255? Let's block ads! بخوانید...

I am running multiple task sequences within a deployment share, with each task sequence I want to set different rules, so I edited my CustomSettings.ini priority to "Priority=TaskSequenceID", and have rules for each task sequence : [Settings] Priority=TaskSequenceID Properties=MyCustomProperty [TASKID01] OSInstall=Y SkipCapture=YES ... Now that each time I try to run a task sequence, I get a prompt message saying "The custom rules file specified does not exit" I have set Gather Local only to...

Here is where I'm getting confused about the working of switch, please advise on below scenarion: 4 PCs are connected to a switch and this switch is aware of their MAC addresses (all 4 PCs). Computer A and Computer D have not communicated ever earlier hence they both don't have their ARP table updated with each other's MAC address. Computer A wants to communicate with Computer D, hence it sends out an ARP request for Computer D's MAC address. This ARP would be a broadcast message (with FF:FF:FF:...

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 do some IP security for members on a web site. One approach we use is to determine the country the connection is coming in on from a number of sources, ARIN/RIPE/LACNIC/APNIC/AFRINIC as well as a few other non standard registries. However, I'm running into problems with connections coming in through RIM servers. Those servers located mostly in Canada and the UK serve as exit points for connections coming in from all over the world. Ideally, I would like to know if there is a way to find out th...

I want to setup a network with about 1000 users. I have access points with no DHCP servers in them. So, I think I might have to put a DHCP server on the network. How can I do that? ...

For some inteal reasons, several people in our company are sharing the same USERNAME when connecting to SERVER, but they connect from different clients and machines. We need to track what each IP address does on the server. Can you suggest how to store the time history of the commands organized by IP address, and not by USERNAME (which would be much easier)? Is that even possible? Specifics: SERVER has Ubuntu 14.04.4 LTS installed, and people are connecting and doing operations on it from both W...

i have four columns that are simplified and look like this item quantity item quantity 102 --- 1 --- 102 --(-3) 103 --- 1 --- 104 --(-1) 105 --- 1 --- 105-- (-1) i want excel to highlight 104 in the third column because it does not exist in the first column, and i also want excel to highlight 102 in the third column because even though it exists in the first column, the absolute value of the number corresponding to it is higher than the corresponding value of 102 in the first column Let's block ...

I just read this on a forum: Chrome 5 has a grab-handle on the address bar, so you can adjust the width allocated to the extension icons and force them into a drop-down menu (indicated by a >> symbol). ...

I have put some scan results from db_nmap in a msf_db workspace called "work1" and I would like to scan it AGAIN with db_nmap. How should I shape my db_nmap command to do so ? Thank you ...

i have to enable port forwarding in my router settings so that i use my exteal IP address and port number to access my PC over inteet. i am creating this but not sure how to do this exactly . please help me in this this is my router port forwarding settings page enter image description here Let's block ads! بخوانید...