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• Importing GPG Key

  - by Bodo

  I have problems importing my GPG-Keys into my new installation of debian. I exportet the private-key a few years ago. Now I am trying to get everything running under a new debian. I tried to do gpg --allow-secret-key-import --import private-key.asc But I only get this: gpg: Keine gültigen OpenPGP-Daten gefunden. gpg: Anzahl insgesamt bearbeiteter Schlüssel: 0 which translates to: gpg: No valid OpenPGP-Data found gpg: Number of processed Keys : 0 The file looks correct and starts with --BEGIN PGP PRIVATE KEY BLOCK----- Version: GnuPG v1.4.9 (GNU/Linux) and ends with -----END PGP PRIVATE KEY BLOCK----- what could be wrong?

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• Public IP Routing over Private GRE tunnel

  - by Paul

  I have a GRE tunnel configured between two linux boxes. The tunnel works fine. I can ping from each host the other private ip. Head privateip: 10.0.0.1 publicip: 8.8.8.8 Tail privateip: 10.0.0.2 publicip: 7.7.7.7 The public IP on Tail has the network block 9.9.9.0/23 statically routed over the 7.7.7.7 interface. The idea is to make the 9.9.9.0/23 ips work on servers on the 8.8.8.8 network. I configure the tail host to route the /23 block. I mounted a 9.9 IP on the head server. I can ping the 9.9 ip from the tail to the head. I can't ping the 9.9 ip from the public internet. I think I need to add some other routes because of gateway issues, but I can't seem to wrap my mind around it (not a router guy, just beating my way through something that I have never done before and vaguely understand) --danks

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• Fix bad blocks on Mac hard disk

  - by Andrew Vit

  I have a hard disk that I scanned with TechTool and it reports one bad block. As far as I can tell, TechTool only scans and reports a failure. It doesn't fix anything. Back in the day, Norton Disk Doctor did the job of scanning and flagging (remapping) bad blocks on the Mac. Today we have various tools for fixing up HFS+ directory errors (Disk Utility, fsck, DiskWarrior, TechTool), but I don't know of any tool that will do a surface scan and fix the bad blocks too. What software is available for this? If I know the address of the bad block, is there a low-level terminal utility for marking it?

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• Remote call script as administrator

  - by drupality

  I created a Windows XP bat script to modify etc/hosts file. I want to share this script at other machine, then from another computer I want to invoke these script to modify hosts file at first computer (via LAN). I need some example. I didn't find any example. Is this possible? I try: runas/user:username block.bat On the same machine login as guest but it doesn't work. No errors just "Attempting to call block.bat" and end of invocation. As admin script works ok. Could someone give me any advice?

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• How to prevent yourself from commenting on websites?

  - by MHH

  There is a bunch of browser add ons to either block particular websites (i.e. leechblock, chrome nanny or various OS specific solutions) or block the comment section of a website (i.e. commentBlocker). However, what if you want to be able to read the comment section of all websites, but want to never be able to add comments yourself, on particular sites? Is there anything that will allow this? I'm particularly interested in answers that will work for both windows and mac, and will also work for google chrome, firefox, and safari (note they can be different solutions for each browser/operating system)

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• Cant access a remote server due mistake by setting firewall rule

  - by LMIT

  I need help due a my silly mistake! So for long time i have a dedicate server hosted by register.it Usually i access remotly to this server (Windows 2008 server) by Terminal Server. Today i wanted to block one site that continually send request to my server. So i was adding a new rule in the firewall (the native firewall on windows 2008 server), as i did many time, but this time, probably i was sleeping with my brain i add a general rules that stop everything! So i cant access to the server anymore, as no any users can browse the sites, nothing is working because this rule block everything. I know that is a silly mistake, no need to tell me :) so please what i can do ? The only 1 thing that my provider let me is reboot the server by his control panel, but this not help me in any way because the firewall block me again. i have administrator username and password, so what i really can do ? there are some trick some tecnique, some expert guru that can help me in this very bad situation ? UPDATE i follow the Tony suggest and i did a NMAP to check if some ports are open but look like all closed: NMAP RESULT Starting Nmap 6.00 ( http://nmap.org ) at 2012-05-29 22:32 W. Europe Daylight Time NSE: Loaded 93 scripts for scanning. NSE: Script Pre-scanning. Initiating Parallel DNS resolution of 1 host. at 22:32 Completed Parallel DNS resolution of 1 host. at 22:33, 13.00s elapsed Initiating SYN Stealth Scan at 22:33 Scanning xxx.xxx.xxx.xxx [1000 ports] SYN Stealth Scan Timing: About 29.00% done; ETC: 22:34 (0:01:16 remaining) SYN Stealth Scan Timing: About 58.00% done; ETC: 22:34 (0:00:44 remaining) Completed SYN Stealth Scan at 22:34, 104.39s elapsed (1000 total ports) Initiating Service scan at 22:34 Initiating OS detection (try #1) against xxx.xxx.xxx.xxx Retrying OS detection (try #2) against xxx.xxx.xxx.xxx Initiating Traceroute at 22:34 Completed Traceroute at 22:35, 6.27s elapsed Initiating Parallel DNS resolution of 11 hosts. at 22:35 Completed Parallel DNS resolution of 11 hosts. at 22:35, 13.00s elapsed NSE: Script scanning xxx.xxx.xxx.xxx. Initiating NSE at 22:35 Completed NSE at 22:35, 0.00s elapsed Nmap scan report for xxx.xxx.xxx.xxx Host is up. All 1000 scanned ports on xxx.xxx.xxx.xxx are filtered Too many fingerprints match this host to give specific OS details TRACEROUTE (using proto 1/icmp) HOP RTT ADDRESS 1 ... ... ... 13 ... 30 NSE: Script Post-scanning. Read data files from: D:\Program Files\Nmap OS and Service detection performed. Please report any incorrect results at http://nmap.org/submit/ . Nmap done: 1 IP address (1 host up) scanned in 145.08 seconds Raw packets sent: 2116 (96.576KB) | Rcvd: 61 (4.082KB) Question: The provider locally can access by username and password ?

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• pfSense + DDoS Protection

  - by Jeremy

  I run a gaming community on a colo with a 100Mbps port. I want to buy a very cheap 35 dollar server with the same 100Mbps port, and run pfSense to use as a hardware firewall. I'm dealing with a bunch of 14 year old kids that have access to botnets, so it can become a bit necessary to get something like this. My overall question, is using pfSense on a cheap identical datacenter/port speed server worth it to actually block DDoS attacks? A bit more into detail since I assume you will ask this, the attacks we receive are normally around 1Gbps. We currently run CentOS using CSF Firewall, and even when using a software firewall, we block 500Mbps UDP floods, or just generic attacks pretty easily. Thanks, - Necro

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• Safari 4 - AdBlock Plus

  - by alexus

  Unfortunately I can't use AdBlock Plus for Safari, so what' do you use to block ads assuming you're using Safari?

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• Create mirror software raid with bad blocks hdd. How to check data integrity?

  - by rumburak

  There is error in System event log like this one: "The device, \Device\Harddisk1\DR1, has a bad block." Because of above I created Raid 1 on this disk and other one. I'm using Windows Server 2008 R2 software RAID volumes. Volume in Disk Manager is marked as "Failed Redundancy" and "At Risk". I could command to "Reactivate Disk" and it's starts to re-sync, but after a while it stops and returns to previous state. It stops re-sync on bad block on old disk and creates same error in System event log. Old disk status is Errors, new disk status is Online. How can I check that there is exact copy of the old disk on new one ? It is server machine so I would prefer to keep it running during this check.

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• zram trimming by writing zero pages

  - by qdot

  I'm using ZRAM as a backing block device for /tmp filesystem in the following manner: echo 8000000000 > /sys/block/zram0/disksize mkfs.ext4 -O dir_nlink,extent,extra_isize,flex_bg,^has_journal,uninit_bg -m0 \ -b 4096 -L "zram0" /dev/zram0 mount -o barrier=0,commit=240,noatime,nodev,nosuid /dev/zram0 /tmp chmod aogu+rwx /tmp It works out reasonably well for me - however, there is an issue here - when files are removed, they are not zero'ed, so the ZRAM does not remote the compressed pages. Obviously running dd if=/dev/zero of=/tmp/ZERO bs=1M count={free-space-some-rest}; rm /tmp/ZERO clears it up in the ZRAM - it gets notified of zero-pages and shrinks the store. How can I get ext4 to zero used pages on delete? Also, any other suggestions on how to optimize it?

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• passing URL vars to a wordpress page and pretty-fying it with .htaccess

  - by Jonah

  I have wordpress installed in a directory called welcome, and /welcome/samples is a "page" (created via Wordpress). It's has a php template waiting for a $_REQUEST['category'] When a user goes to /welcome/samples/fun, I want to have "fun" passed to the samples php template in the form welcome/samples/?category=fun But I want the URL to remain in its original form - it's currently replacing the it with the ugly "?cat...etc" # Outside the wordpress block so it won't be overwritten Options +FollowSymlinks RewriteEngine On RewriteRule ^samples/([^/]+)$ /welcome/samples?cat=$1 [R,L] # BEGIN WordPress <IfModule mod_rewrite.c> RewriteEngine On RewriteBase /welcome/ RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule . /welcome/index.php [L] </IfModule> # END WordPress I tried Rewriting with simply samples?cat=$1 but I was getting a 404. I tried putting in the RewriteBase /welcome/ in the first block. without the [R] flag it doesn't work at all. I keep trying different permutations... and failing:( Perhaps I'm missing some basic concepts... thanks if you take the time to even read through this:) ciao

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• fail2ban with Cloudflare

  - by tatersalad58

  I'm using fail2ban to block web vulnerability scanners. It is working correctly when visiting the site if CloudFlare is bypassed, but a user can still access it if going through it. I have mod_cloudflare installed. Is it possible to block users with IPtables when using Cloudflare? Ubuntu Server 12.04 32-bit Access.log: 112.64.89.231 - - [29/Aug/2012:19:16:01 -0500] "GET /muieblackcat HTTP/1.1" 404 469 "-" "-" Jail.conf [apache-probe] enabled = true port = http,https filter = apache-probe logpath = /var/log/apache2/access.log action = iptables-multiport[name=apache-probe, port="http,https", protocol=tcp] maxretry = 1 bantime = 30 # Test Apache-probe.conf [Definition] failregex = ^<HOST>.*"GET \/muieblackcat HTTP\/1\.1".* ignoreregex =

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• eMail with Conflicting Headers not blocked in MS365

  - by John Meredith Langstaff

  On occasion, a company receives eMail with two header fields (“Received” and “From”) containing data that contradict each other drastically. Should they not expect their anti-spam system to flag or block items with contradictions in these fields? For example, they received an eMail which contained [almost exactly] these two headers: Received: from [107.52.51.26] by web315204.mail.ne1.yahoo.com via HTTP; Mon,28 Oct 2013 04:28:04 PDT From: Barry Smith [email protected] Obviously, eMail from an @att.net address isn’t coming from a server on the domain yahoo.com, and Yahoo isn’t forwarding AT&T’s eMail. There were no other headers indicating that the item was sent “OnBehalfOf”, or “Forwarded-by”, or “By_Proxy” or any other such. Should I write a utility to scan incoming eMail for such conflicts, or look more closely at their spam filtering to block this kind of eMail? Their eMail system is Hosted Exchange on MS-365. My central question is, where specifically do I look in MS-365 to get this type of conflicted eMail blocked?

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• Where do I learn about IP blocks and subnets? Or is there just a calculator that does it all for me?

  - by cwd

  Amazon's elastic compute tool (among others) requires the ip block format for their command: ec2-authorize websrv -P tcp -p 80 -s 205.192.0.0/16 I may be doing this wrong, but as far as I can tell I need to use the block format even for a single IP address. 1) So, how would I do that for this IP? 71.75.232.132 Several years ago I took a CCNA class, and I remember going over IPs and subnets, masks, broadcast addresses, class a/b/c networks, etc. However a lot seems to have changed since then - for example I don't think you can tell what "class" a network is in just by looking at it anymore - sometimes they could be multiple classes. 2) Anyhow, my second question is where do I go to get a refresher on all these things? 3) Or should I just be using ipcalc or an online calculator to do it all for me - and if so, which one?

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• How to drop all subnets outside of the US using iptables

  - by Jim

  I want to block all subnets outside the US. I've made a script that has all of the US subnets in it. I want to disallow or DROP all but my list. Can someone give me an example of how I can start by denying everything? This is the output from -L Chain INPUT (policy DROP) target prot opt source destination ACCEPT all -- anywhere anywhere ACCEPT all -- anywhere anywhere state RELATED,ESTABLISHED ACCEPT tcp -- anywhere anywhere tcp dpt:ftp state NEW DROP icmp -- anywhere anywhere Chain FORWARD (policy DROP) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination And these are the rules iptables --F iptables --policy INPUT DROP iptables --policy FORWARD DROP iptables --policy OUTPUT ACCEPT iptables -A INPUT -i lo -j ACCEPT iptables -A INPUT -i eth0 -m state --state ESTABLISHED,RELATED -j ACCEPT iptables -A INPUT -p tcp -i eth0 --dport 21 -m state --state NEW -j ACCEPT iptables -A INPUT -p icmp -j DROP Just for clarity, with these rules, I can still connect to port 21 without my subnet list. I want to block ALL subnets and just open those inside the US.

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• What solutions do I have to enforce memory limit on PHP server?

  - by Zulgrib

  I would like to enforce memory limit on a folder basis (and have it applied on subfolders) but I don't want the user able to change the memory limit. I know I can disable ini_set and I know I can enforce a hard limit or deny ini_set with Suhosin. With the first one, I doubt it will block changing it from the user.ini file, for the second, the user may still be able to change it to the hard limit I enforce with Suhosin. In both cases, I would prefer to not entierly block ini_set because it may have a legit use for other settings. In case it is important, I'm using PHP version 5.4.4 with nginx (PHP in FPM mode)

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• squidGuard hangs during setup

  - by richard

  I have a squid proxy on my Debian-Gnu-Linux-laptop configured to block some web sites. I can set a browser to use this proxy, but I can also configure it to not use it. As I an using it to block some sites. I do not wish and application to be able to bypass the proxy. Is it possible to to configure a fire wall to black outgoing traffic except if sent by the proxy application or user? I would like a simple configurator if possible.

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• Xpath automatization software

  - by holms

  Too sad this topic was closed. But I'm kind of a having the same question. I want to construct xpathes, for common html block which appears on page. For example: you can give two URLs to that software, which will contain SAME html blocks (divs) , but having different content in it. by giving 2 stackoverflow.com url's, software could detect that same div#id is being used once again, and just give XPATH'es of those html blocks like for example. Of course I can find xpath'es my self, as far as I remember, firebug makes it easy,shows xpath of every html block, but this is kind of hard procedure if you want to get xpath'es for LOTS of html elements. so that's why I want this kind of software to help in this routine.

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• Understanding packet flows over RVI

  - by choco-loo

  I'm trying to get a full grasp of firewall filters and how to apply them on a Juniper EX4200 switch - to be able to block ports, police traffic and shape traffic. The network architecture is as follows internet >-< vlan4000 >-< vlan43 vlan4000 is a public "routed" block (where all the IPs are routed to and the internet gw is) vlan43 is a vlan with public IPs with devices (servers) attached There are static routes and RVI's on the EX4200 to send all traffic via vlan4000's gateway to reach the internet. I've set up filters on both input and output of the respective RVI's and VLAN's - with simple counters, to measure traffic flow from a server inside of vlan43 and a server on the internet. Using a combination of iperf for UDP and TCP tests and fping for ICMP tests - I observed the following, icmp vlan43>internet internet>vlan43 unit4000-counter-in 0 0 unit4000-counter-out 0 0 unit43-counter-in 100 100 unit43-counter-out 0 0 vlan4000-counter-in 6 4 vlan4000-counter-out 107 104 vlan43-counter-in 101 100 vlan43-counter-out 100 100 tcp vlan43>internet internet>vlan43 unit4000-counter-in 0 0 unit4000-counter-out 0 0 unit43-counter-in 73535 38480 unit43-counter-out 0 0 vlan4000-counter-in 7 8 vlan4000-counter-out 73543 38489 vlan43-counter-in 73535 38481 vlan43-counter-out 38938 75880 udp vlan43>internet internet>vlan43 unit4000-counter-in 0 0 unit4000-counter-out 0 0 unit43-counter-in 81410 1 unit43-counter-out 0 0 vlan4000-counter-in 18 7 vlan4000-counter-out 81429 8 vlan43-counter-in 81411 1 vlan43-counter-out 1 85472 My key goals are to set up a few filters and policers, as there will be many more VLANs - that all need protecting from each other and the internet. Then globally limit/police all outbound traffic to the internet Block inbound ports to vlan43 (eg. 22) Limit outbound traffic from vlan43 (to the internet) Limit outbound traffic from vlan43 (to other vlans) Limit outbound traffic from vlan4000 (to the internet from all vlans) Route traffic from vlans via specific routing instances (FBF) The question What I want to understand is why there isn't ever any activity on unit4000 or vlan4000 inbound or outbound counter - is this because there isn't a device on this VLAN - and that the traffic is only traversing it? And with regards to the TCP test - why is there twice as many packets on unit43-counter-in, vlan4000-counter-out and vlan43-counter-in - is this counting both the inbound and outbound traffic?

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• C++ Style Comments for Microsoft Word 2008?

  - by user33559

  Hello, I would like to be able use some sort of C++ style commenting for Microsoft Word. E.g. If I have // line of text the entire line should be a comment and should appear in a different colour. Same goes for: /* text block */ I would want text block to be in a different colour than my main text. Another feature that would be nice but not necessary for me to have is some sort of a way to quickly strip all the comments. I have no idea how this could be done, if possible. Any ideas? Thanks.

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• Use Adblock to allow most ads on a site

  - by jrob

  I leave Adblock turned on for all sites by default. I allow ads on some sites. You can do this by adding an exception for a site that is allowed to show ads. This puts a site in the white list. However, I do not know how to allow most ads on a page, but block a specific ad. I am not even sure Adblock will do this. I believe it is all or none. If a site is in the white list, it appears that all other rules are ignored. Is there a way to allow most ads on a website, but still block specific ads?

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• What tangible security are gained by blocking all but a few outgoing ports in a firewall

  - by Frankie Dintino

  Our current hardware firewall allows for blocking incoming and outgoing ports. We have two possibilities: Block certain troublesome ports (unsecured smtp, bittorrent, etc.) Block all but a few approved ports (http, https, ssh, imap-ssl, etc.) I see several downsides with option 2. Occasionally web servers are hosted on non-standard ports and we would have to deal with the resulting issues. Also, there is nothing preventing a malicious or unwanted service from being hosted on port 80, for instance. What are are the upsides?

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• Adding operation in middle of complex sequence diagram in visio 2003

  - by James

  I am using Microsoft Visio 2003 to define static classes with operations/methods and a sequence diagrams referring to these classes. The sequence diagram is almost done, but i realized that i missed one operation in middle of the diagram. When i try to move rest of the sequences down by selecting it as a block, all the operations in the block loose link with static diagrams. ( Methods which were referred to static classes as fun(), became fun, which means that now they no longer refer to static diagrams and any future changes would not be reflected in dynamic sequence diagrams automatically.) The sequence diagrams have grown to A3 size paper and i have many of such diagrams which needs correction. Manually moving the operations one by one would involve lots of effort. Could someone kindly suggest a way to overcome this problem?

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• Decreasing Root Disk Size of an "EBS Boot" AMI on EC2

  - by darkAsPitch

  So I have followed Eric's wonderful article here: http://alestic.com/2009/12/ec2-ebs-boot-resize This was the code basically that helped me increase the default size of the AMI: ec2-run-sintances ami-ID -n 1 --key keypair.pem --block-device-mapping "/dev/sda1=:250" Running Ubuntu 11.10 I didn't even have to re-size the disk afterwards, it was immediately a 250GB drive. How do I go about decreasing the default size of the AMI??? I tried: ec2-run-sintances ami-ID -n 1 --key keypair.pem --block-device-mapping "/dev/sda1=:100" Obviously... but I was told: Client.InvalidBlockDeviceMapping: Volume of size 100GB is smaller than snapshot ####### <250

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• Exploratory Question for Security Admins (/etc/passwd + PHP)

  - by JPerkSter

  Hi everyone, I've been seeing a few issues lately on a few of my servers where an account gets hacked via outdated scripts, and the hacker uploads a cPanel / FTP Brute forcing PHP script inside the account. The PHP File reads /etc/passwd to get the usernames, and than uses a passwd.txt file to try and brute force it's way in to 127.0.0.1:2082. I'm trying to think of a way to block this. It doesn't POST anything except "GET /path/phpfile.php", so I can't use mod_security to block this. I've been thinking of maybe changing permissions on /etc/passwd to 600, however I'm unsure how this will result in regards to my users. I was also thinking of rate-limiting localhost connections to :2082, however I'm worried about mod_proxy being affected. Any suggestions?

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