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• Cannot connect to FTP server from external host

  - by h3

  I have a FTP server (vsftpd) setuped on a Linux box (Ubuntu server). When I try to connect with a computer on the same network everything works fine as expected. But as soon the IP is external it won't connect.. I first assumed the port was blocked, but then: localserver:$ sudo tail -f /var/log/vsftpd.log Wed Jan 13 14:21:17 2010 [pid 2407] CONNECT: Client "xxx.xxx.107.4" remotemachine:$ netcat svn-motion.no-ip.biz 21 220 FTP Server And it hangs there .. Is there any other ports other than 21 that are required to be open ?

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• Single NFS folder shared across multiple clients

  - by parthi_for_tech

  I'm trying to mount a single NFS folder from server say "/share/folder" to multiple clients up to 32 clients, and the clients tries to access the folder and create files. The problem I'm facing is that when I execute the write command I see only one client is able to access the folder the remaining clients are blocked and not able to proceed to write. So, is whatever I'm trying to do above is correct? Can we write/read files from the same folder on multiple clients? if yes how can I do it prallel? Kindly advice! Thanks

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• Using unsigned drivers in Windows 8

  - by T. Fabre

  I just migrated from Windows 7 x64 to 8, but I can't get my VPN software to run anymore : the SafeNet IKE service (installed by SafeNet SoftRemoteLT GA, used by my VPN provider) cannot start anymore. I found that by default unsigned drivers are disabled on Win8, and that is what is blocking the driver. The System event log tells me that the driver (apparently, C:\WINDOWS\SysWow64\Drivers\IPSECDRV.sys ) was blocked when I try to manually start the service (SafeNet IKE Service). I get the same messages for another driver, crypto.sys found in the same folder. I tried using bcdedit to enable unsigned drivers : bcdedit /set loadoptions DDISABLE_INTEGRITY_CHECKS bcdedit /set testsigning ON After reboot, same error. I tried by booting into Win 8's test mode, same issue. Applying the code signing policy (Enabled, Ignore) does not help either. Running gpresult does show that the policy is applied. Any help welcome.

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• How to apply Outlook Junk Mail rules using Hotmail Connector?

  - by Bobb

  I use Outlook 2010 with Hotmail connector. MS says that you can sync your Outlook rules with your Hotmail but I cant see how. My actual problem is - I add a guy to my Junk blocked senders list (and I check it visually - it is in the list). But I keep receiving emails from this guy. It doesnt go to the Junk folder in Outlook. I need my Outlook to honor the rules locally at least. Is it possible?

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• Finding, which web component is causing problems during page loading

  - by Juhele

  I am using windows version of Firefox 5.0 and last few days I found that on one website (similar focus as stackexchange but in Czech), is something wrong as my browser loads it very slowly (while the connection is ok and never had problems with it). There is also another guy trying to solve the almost the same problem, but no help yet. So I would ask, whether there is some Firefox plugin showing which page components are loading and which could help me to find out the problem. I am writing from office pc so we have blocked all the social networks like FB, Twitter etc. and I also use Adblock Plus - however, deactivating it does not have any effect on it. thanks

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• ssmtp for windows

  - by reox

  I have the following problem with a software that should do mail notification for a biometric entry system: the software does currently only support SMTP over port 25 without TLS/SSL. Which is bad because port 25 is blocked in our network due spam reason and our mailserver only support TLS / SSL logins. so i need a solution to connect to a localhost smtp server which just relays to my ssl host on port 587. i know there is ssmtp for linux, but i need it for windows, because the server app for this biometric stuff only runs on windows... edit: i know there is the IIS SMTP Server, but maybe something different?

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• What type of security problems are mitigated by this .NET architecture?

  - by Jonno

  Given the following physical layout for a .NET web application: DB (sql server, windows) - No public route (no table access, only stored procs) Web Service DAL (iis, windows) - No public route (can be accessed by web server via port 80 and 443) Web Server (iis, windows) - Public route (only via port 80 and 443) What type(s) / examples of attack could be used to compromise the public web server but would be blocked by the Web Service DAL? i.e. can you think of concrete attack types that the DAL stops? Please note, I am interested only in the security aspect, not scaling / fault tolerance / performance / etc. In my mind if the web server has been compromised using an attack over port 80/443, then the same attack would work over port 80/443 to the Web Service DAL box.

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• Sonicwall Global VPN Client fails to connect, despite successful connections from other computers from behind the same router

  - by JesperE

  I've recently been unable to connect to our Sonicwall VPN at work. The Sonicwall client is stuck on "connecting", and the log says "The peer is not responding to phase1 ISAKMP requests". The weird thing is that this is not an issue with my own PC, only my work laptop (Lenovo W530 running Windows 7 64-bit), and this has only appeared recently. This ought to rule out any problems with my ISP blocking VPN, or issues with the router itself. My company's IT department says that they cannot see anything in their logs when I'm trying to connect. My conclusion is that something is wrong on the laptop itself. Disabling the firewall does not help. Can the VPN connection be blocked in other ways? What should I be looking for? EDIT: This problem has "magically" disappeared, without any changes done in my network. I can only assume that this was caused by some network glitch with my ISP.

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• Updating Mcafee Group Shield on Exchange Server

  - by AllanPedersen

  So I don't actually have a problem yet, but I might. You see my fathers company have 10 computers and an exchange server with Mcafee Group Shield. lately they've had issues with mails from customers being blocked. I found both the problem and the solution: Mcafee update so basicly update their Mcafee group shield to the newest service pack and we are all back in buisness.. while I have some limited exchange experience and AD too. I don't have any Mcafee experience. I don't wanna crash their server for a week and have them need to get someone to recover it. So my question in here.. is it supposedly as easy as to click an 'update' button and to reboot your server.. or are there several issues I need to be aware about..? Maybe there is some common issue that goes with updating antivirus on an exchange server that I don't know about..

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• Domain only responding to certain locations?

  - by CuriosityHosting

  I have a client who's been having problems with his site. The server doesn't seem to want to load hes site in certain countries, though other sites are fine. But this site [link removed] only seems to load in the US and Canada. In Europe, the UK, Asia etc, the site seems to be blocked (been like this for a week now). I've looked over the server and it seems fine. Other sites work fine, and the NS are set up properly, pointing to my main server, at http://puu.sh/MIGF Any ideas?

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• Problem with fitting graphics card

  - by Gary Robinson

  I have recently purchased a new radeon hd5670 graphics card. The problem I have is that it is what I might call a double height card. So the end where you fix the card to the case is twice the size of the card it is replacing. But this means that it is blocked by the rear of the network card. The only way I can see it to cut that part of the fixture part out then I won't have a problem. But has anyone any suggestions what I could use? To be clear it is not the actual card it is the fixture part which is 90 degress to the card that is causing the problem. Unless someone knows of another solution - some kind of pci-e extender that I could use as I could easily

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• How do I stop someone from saturating my line & wasting CPU cycles

  - by JoshRibs

  My web host shows inbound & outbound traffic with mrtg. I have a steady 3.5mbps inbound traffic from Nigeria. Even assuming the source IPs & destination ports are blocked with Iptables & verifying nothing is listening on those ports, will the traffic still always pass through the switch & "get" to my server (where my server wastes CPU cycles "dropping" the packets)? Assuming I was setup with a hardware firewall, the traffic would still show in mrtg assuming the firewall is behind the switch? So is there any way to stop someone from saturating your 100mbps line, if they also have a 100mbps line? Other than filing an abuse complaint with the kind folks in Nigeria?

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• Ubuntu doesn't start and I can't login [migrated]

  - by Meph00

  My ubuntu 13.04 doesn't boot anymore. Eternal black screen. If I press ALT+CTRL+F1 I see that it's stucked on "Checking battery state [OK]." I'd like to try to go with sudo apt-get install gdm but I can't login on terminal tty2, tty3 etc. They correctly ask for my nickname, then they make me wait a lot, ask for password and make me wait again. After a lot of time (... a lot) the best I could achieve was visualizing "Documentantion https://help.ubuntu.com". I can never reach the point where I can give commands. Plus, during the long pauses, every 2 minutes it gives a messagge like this: INFO: task XXX blocked for more than 120 seconds. Any suggestion? Sorry for my bad english and thanks everyone for the attention.

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• Log with iptalbes which user is delivering email to port 25

  - by Maus

  Because we got blacklisted on CBL I set up the following firewall rules with iptables: #!/bin/bash iptables -A OUTPUT -d 127.0.0.1 -p tcp -m tcp --dport 25 -j ACCEPT iptables -A OUTPUT -p tcp -m tcp --dport 25 -m owner --gid-owner mail -j ACCEPT iptables -A OUTPUT -p tcp -m tcp --dport 25 -m owner --uid-owner root -j ACCEPT iptables -A OUTPUT -p tcp -m tcp --dport 25 -m owner --uid-owner Debian-exim -j ACCEPT iptables -A OUTPUT -p tcp -m limit --limit 15/minute -m tcp --dport 25 -j LOG --log-prefix "LOCAL_DROPPED_SPAM" iptables -A OUTPUT -p tcp -m tcp --dport 25 -j REJECT --reject-with icmp-port-unreachable I'm not able to connect to port 25 from localhost with another user than root or a mail group member - So it seems to work. Still some questions remain: How effective do you rate this rule-set to prevent spam coming from bad PHP-Scripts hosted on the server? Is there a way to block port 25 and 587 within the same statement? Is the usage of /usr/sbin/sendmail also limited or blocked by this rule-set? Is there a way to log the username of all other attempts which try to deliver stuff to port 25?

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• Deleting slow on X11 emacs

  - by Malvolio

  I'm running GNU Emacs 21.4.1 on a (remote) remote Linux ((CentOS) box, using my MacBook as the X-server. Works fine, unless I try to delete a word, line, or region. Then it locks up for 30 seconds or so. It sounds like a minor thing, but you realize how often you do a delete when you have to stop for 30 seconds every time. My theory is that Emacs is trying to put the text in the X-server cut-and-paste buffer, which is trying to put it in the OSX cut-and-paste buffer and somewhere along the way, the process is blocked until it times out. (My only evidence for this theory is (a) copy-region behaves the same way and (b) deleted text doesn't show up in the buffer.) Any suggestions appreciated. Edit: (setq interprogram-cut-function nil) fixed me right up. Which makes perfect sense. Thanks, Trey.

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• Privoxy rule to block Facebook spying

  - by bignose

  Recently, my server's Privoxy rules to block Facebook's spying have failed. How can I block current Facebook spying links? Since soon after [the inception of Facebook's so-called “Open Graph” cross-site tracking widgets][1] (those “Like” bugs on numerous websites), I blocked them by using this rule (in user.action) on our site's Privoxy server: { +block-as-image{People-tracking button.} } .facebook.com/(plugins|widgets)/(like|fan).* That worked fine; the spying bugs no longer appeared on any web page. Today I noticed that they're all making it past that filter [edit: no, they're not]. SOLUTION: The proxy was being silently ignored, though this was not obvious in the client. The above rule continues to work fine.

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• Setting up a simple proxy

  - by waiwai933

  I'm going to China for a week, and I'd prefer to be able to watch YouTube while I'm there. Since it's blocked, I presume I'm going to need a proxy. I have a Mac and a Linux box at home that I can use, but I'm not sure how complicated setting up a proxy is. From what I understand, I should be able to do it with a browser that supports HTTP 1.1 CONNECT if I connect to my machine at home. Can I do this, and if so, what browser can I use, or if I have misunderstood something, do I have any other simple solutions?

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• Preventing my postfix to send my local users spam

  - by Jack

  I have a postfix/dovecot mail server with 100 different users. When they send an email they need to be authenticated. I successfully use saslauth to achieve this. Few days ago I had a problem. One specific user, probably with a virus or a spam-bot installed in its computer, started to send out through my server thousands of emails in few hours. As result, my ip has been blocked by many isp provider (@aol, @yahoo, and others) and has been listed in many blacklist, making all my 100 users unable to send any email to anyone. What is the best practice to avoid this problem? It would be great if my server could recognize a spamming user and automatically block it. Also, have a limit of, say, 30 emails per hour could be a partial solution. Any idea how to face this problem? Thank you

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• how to report a malicious site (http://newss.gr) to google, microsoft and mozilla so that they will prompt

  - by Jayapal Chandran

  Hi, I completed a project an year ago. Now a few modification were needed. While i try to test there was an index.html with a malicious script which had an iframe to this site's jar file. and kaspersky anti virus blocked it. So i browsed the ftp to find the file and i deleted it. and also disabled directory listing. May be the ftp details of the site owner would have been hacked. I want to report this site to google, msn and mozilla and other antivirus programs. How to do that. any idea? I hope kaspersky would have updated it in their database but still i want to explicitly inform it about this. here is the popup kaspersky showed.

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• How do I configure the Google Chrome / Chromium address bar to perform a search instead of trying to access a file on the local file system?

  - by Daniel Kauffman

  How do I configure the Google Chrome / Chromium address bar to perform a search instead of trying to access a file on the local file system? I would like to be able to enter a file name in the address bar and to see Google search results for that file name similar to what I would see if I searched for the file name using something like https://www.google.com/#q=/path/to/interesting/file I am able to disable the file scheme using either of the following policy settings: "DisabledSchemes": ["file"], Which has been deprecated in favor of: "URLBlacklist": ["file://"], But in either case Google Chrome / Chromium continues to auto-detect that a file name was entered, automatically prepends the file scheme to the file name, and then reports that the webpage is blocked.

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• postfix cannot send email

  - by AKLP

  I'd like to mention that im really new to this so please bear with me. I'm trying to setup a forum software to send emails via postfix but I think my server has the port 25 blocked. I tried running these: works: ping alt2.gmail-smtp-in.l.google.com don't work: telnet alt2.gmail-smtp-in.l.google.com 25 telnet 66.249.93.114 25 tried flushing iptables and then using these rules but didn't work either: sudo iptables --flush sudo iptables -P INPUT ACCEPT sudo iptables -P OUTPUT ACCEPT sudo iptables -P FORWARD ACCEPT sudo iptables -F sudo iptables -X doing a telnet on 25 port to localhost url works but nothing when telnet'ing in none local urls. mail.log: Oct 17 01:20:24 webhost postfix/smtp[3642]: connect to alt2.gmail-smtp-in.l.google.com[2607:f8b0:400e:c03::1a]:25: Connection timed out Oct 17 01:20:24 webhost postfix/smtp[3643]: connect to alt2.gmail-smtp-in.l.google.com[2607:f8b0:400e:c03::1a]:25: Connection timed out Oct 17 01:20:24 webhost postfix/smtp[3642]: 4744380032: to=<[email protected]>, relay=none, delay=2892, delays=2741/0.03/150/0, dsn=4.4.1, status=deferred (connect to alt2.gmail-smtp-in.l.google.com[2607:f$

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• What kind of proxy acl rules should be applied?

  - by user42891

  I try to block sites in squid based on this article. Assuming you would want to block access to Yahoo (e.g http://www.yahoo.co.jp, http://www.yahoo.com, http://www.yahoo.co.in), you would ideally want to block all of the above URLs, if I use a regular expression and try to search something called yahoo it seems to get blocked. We are just interested in applying rules which would be most commonly used across all companies (e.g. social networking sites like facebook, orkut), porn sites (e.g. sex), gaming sites (games), movie & song download sites, and sites where they can upload data (e.g. rapidshare) What would be the common set of effective rules in achieving the above?

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• Can't set up Usermin correctly to allow users to login outside of local network, what am I missing?

  - by thecraic

  I'm fairly new at creating a server, but the biggest problem I am currently having at the moment is getting Usermin set up to be accessible from outside the LAN. I talked to other people that use it and was told that all I need to do is type the url:20000 to access the login screen, but that doesn't work. I have also tried the ip:20000 and that doesn't lead to anything. Instead I get the error message: Error - Bad Request This web server is running in SSL mode. Try the URL https://hostname:10000/ instead. (where hostname is my server's hostname) I know it must be a configuration issue, but I have checked all my settings and as far as I can tell I don't have the ports blocked anywhere. I have the correct ports forwarded on my router and my server firewall doesn't have the port block either. Is there anything I am missing? Any help would be appreciated and I will add more information upon request. Thank You.

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• Intermittent HTTP 401 errors

  - by forthrin

  I am using an Intranet solution which requires basic HTTP login. However, there is an intermittent error which requires me to log in again, and then the server says "Forbidden" whether I give the correct login information or not. To add insult to injury, Safari (and Chrome) seems to show the login dialog for every included resource in the HTML, and it's impossible to cancel this modal dialog sequence, so the whole browser is blocked until I've pressed Esc some 30 odd times. After an hour, I may gain access again, without having really done anything. My questions: What could cause temporal 401 errors? Why do the browsers show the login dialog 30 times per page load (assumedly for every included resource in the HTML from the same domain)?

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• Tracing what program is making a network connnection? (CentOS)

  - by Airjoe

  I was wondering if it is possible to find out which process is trying to make a specific network connection. On a server I support which hosts websites for about 200 users, the iptables firewall keeps blocking, as it should, a connection to 212.117.169.139 on port 80. Firefox reports this as an attack page (and at the least is obvious spam, if not malicious). It seems something on this server is trying to access this site for some reason, and although it's being blocked successfully, the requests seem to be going through every two to sixty seconds and I'd like to be able to find what process or script is doing this so I can handle it appropriately. Besides doing a grep to try and find if this IP is in some file (which probably won't even work because it may be working by hostname or it may be encoded), is there any way to find out some more information? Thanks!

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