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  • Logging communication between two VMs

    - by sYnfo
    Hi, I'm trying to set up "malware lab" described in this paper. So far, I've set up Windows guest system, adding one Host-only Network adapter, and setting this (sorry if the names aren't exactely correct, I don't have an english language version): - IP Address - 10.0.0.3 - Subnet mask - 255.255.255.0 - Default gateway - not set - Preferred DNS - 10.0.0.4 - Alternate DNS - not set And a Linux guest system - Ubuntu 9.04 - with two Network adapters - Bridged (eth0) and Host-only (eth1), and setting eth1 IP Address to 10.0.0.4, leaving the eth0 to be set by DHCP. Then, I have configured iptables as described in the paper, ie.: iptables -F -t nat iptables -F -t mangle iptables -t mangle -P PREROUTING ACCEPT iptables -t mangle -P OUTPUT ACCEPT iptables -t nat -P PREROUTING ACCEPT iptables -t nat -P POSTROUTING ACCEPT iptables -t nat -P OUTPUT ACCEPT iptables -t mangle -A PREROUTING -i eth0 -j ACCEPT iptables -t mangle -A PREROUTING -p udp -i eth1 -d 10.0.0.3 --dport 53 -j ACCEPT iptables -t mangle -A PREROUTING -p tcp -i eth1 --dport 80 -j ACCEPT iptables -t mangle -A PREROUTING -p tcp -i eth1 -d 10.0.0.3 --dport 6000:7000 -j ACCEPT iptables -t mangle -A PREROUTING -i eth1 -j ULOG iptables -t mangle -A PREROUTING -i eth1 -j DROP Now, when I try to ping the windows system from within the Linux system, it does not reply, I guess thats perfectly normal, because iptables is blocking ping responce. Same when I try to ping the Linux system from within the Windows. But when I try to access any web page from within the Windows system, I would expect that this action should get logged by iptables. But thing is, I don't see any of that kind of lines in log file (If I am looking in the right place, that is. :) It is at /var/log/messages, isn't it?). So, what do you think might be the problem here? I should note, that this is the first time I'm using linux, so don't expect ANY working knowledge of Linux at all... :) Also, since english is not my mother tongue, feel free to point out any gramatical mistakes... :) Thanks for any advice.

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  • troubleshooting postifx -> exchange connection issues

    - by Systemspoet
    I have three linux-based mail routers that run postfix and relay mail to our on-premise exchange server as well as to outlook.com, splitting the mail based on ldap atttributes. What I've observed sporadically since upgrading this spring from Exchange 2007 to 2010 is that all three of the mail relays will, for about 20 minutes, fail to connect to exchange. Postfix logs it as "lost connection with exchange.contosso.edu" ; this problem almost always occurs to all three mail relays at the same time, and lasts for slightly under 20 minutes. If I can catch it while it's occuring, and I manually do "telnet exchange.contosso.edu 25" from one mail relay and force a message through (helo, mail from, rcpt to, data, etc), then it clears that relay up. The exchange "server" is actually two machines with the HT role on them, load balanced via windows NLB. I've worked pretty hard to figure out what's happening from the postfix side and I can't see any evidence of any misbehavior. My question is, how do I attack the problem from the exchange side? Is there a connection log, or a debug setting, or something I can do to log all of the inbound connections and tell me what's causing exchange to drop them?

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  • Why is my browser using so much memory?

    - by Steve
    Hi. I've recently had problems with Firefox running very slowly when I have many tabs open; say 20 tabs. My whole system would slow down. I decided to give Google Chrome a try, and it started out fine. But lately I am finding that it too, slows down my whole system. Looking at Task Manager, chrome.exe is using about 250MB of memory in about 6 different entries in task manager. However, when I shut Chrome down, memory usage is reduced by about 600MB. How can this be? (shows drop in memory usage after ending Chrome.) When my system locks up with Chrome having many tabs open, it takes 10 seconds to load the Start Menu, 10 seconds to expand All Programs, and each folder and subfolder, and 30 seconds for the program to be highlighted under my mouse. It also takes 10 seconds to switch to Notepad. Why is Chrome appearing to use so much more memory than Task Manager indicates? Why is my pagefile being used when I have around 1.1GB of memory? Can I set Chrome to run in RAM and not in the pagefile? How can 20 tabs use 600MB? That's 30MB per tab. Thanks for your help.

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  • Allow SFTP in iptables

    - by Kevin Orriss
    I have just purchased a VPS from linode and am going through the setup guide. I have everything running (apache2, php, mysql etc) but I am being denied access via SFTP when using fileZilla to upload a file. Now this is my second time installing the server as I missed a section out the first time. I was able to connect to my server through SFTP on filezilla the first time and the thing I missed out was adding a new user and editing the iptables in the firewall. So it would seem that the guide I have been following has blocked SFTP but allowed SSH. Here is the iptables file: *filter # Allow all loopback (lo0) traffic and drop all traffic to 127/8 that doesn't use lo0 -A INPUT -i lo -j ACCEPT -A INPUT ! -i lo -d 127.0.0.0/8 -j REJECT # Accept all established inbound connections -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT # Allow all outbound traffic - you can modify this to only allow certain traffic -A OUTPUT -j ACCEPT # Allow HTTP and HTTPS connections from anywhere (the normal ports for websites and SSL). -A INPUT -p tcp --dport 80 -j ACCEPT -A INPUT -p tcp --dport 443 -j ACCEPT # Allow SSH connections # # The -dport number should be the same port number you set in sshd_config # -A INPUT -p tcp -m state --state NEW --dport 22 -j ACCEPT # Allow ping -A INPUT -p icmp -m icmp --icmp-type 8 -j ACCEPT # Log iptables denied calls -A INPUT -m limit --limit 5/min -j LOG --log-prefix "iptables denied: " --log-level 7 # Reject all other inbound - default deny unless explicitly allowed policy -A INPUT -j REJECT -A FORWARD -j REJECT COMMIT All I would like is a line I need to put in there which allows SFTP over port 22. Thank you for reading this.

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  • Transfer iptables rules to another server (almost) real time

    - by MrShunz
    I'm running 2 cPanel servers with ConfigServer Security & Firewall plugin. One of the functions of the plugin is to block via iptables (temporarily and/or permanently) IPs which fail various authentications (POP3/IMAP, SMTP, FTP, webmail, mod_security and such). Now, i'd like to push those IP blocks to the border router to drop packets as soon as possible (and doing so protecting the other machines on the network). Keep in mind that after N failed logins IP is blocked for 5 minutes, then re-allowed. If multiple bans occours in an hour IP is blocked permanently and should be unlocked "by hand". So I need a near realtime solution. What I'm looking for is a better way than firing some cronjobs both on cPanels and border router to: dump the rules to file transfer the file to border router (via scp/sftp) load the rules from the file in the border router I'm aware that I will need some scripts to parse and modify the rules as cPanels have one ethernet interface and some aliases while border router has two ehternet interfaces and some loopbacks. All machines involved use Linux. EDIT as per @pjmorse comment. The plugin consists of a bunch of perl and config files. The part I'm intrested in is a process which scans logfiles (lfd) and installs iptables rules (and sends an alert email). Fact is, it upgrades quite often (one or two times a week) and itself is 7000 lines of perl so I'm not comfortable on tampering with it.

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  • disable mystery programs running at startup

    - by pstanton
    Hi and sorry for the ambiguous title... I have a few programs that should run at startup which are 'properly' configured to do so via adding shortcuts to the startup directory: C:\Users\[me]\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup However I have (at least) 4 programs which are also starting up, which I can't find where they are configured or how to disable them. I have tried to find them in the above folder, as well as in the 'startup' section of 'msconfig'. The programs include: Skype (for which I have disabled 'start when windows starts' in its options) Thunderbird (for which I cannot find any option to run-at-startup) Task manager (as above) and some anonymous call to javaw (can't find any more details but it fails anyway) The other strange thing is that it seems like these (at least skype and thunderbird) are running 'as administrator' ... i have deduced this because I am unable to use the file-drag-and-drop feature in both (which is a known problem when running 'as administrator'). If someone could guide me to where these extra programs are configured to run-at-startup I would be very greatful! ps. my user account has the administrator role. EDIT: preferrably without another 3rd party tool...

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  • Is it possible to add a WiFi HotSpot to an already established LAN, keep the two separate, and not modify the primary router?

    - by user12844
    I have a set up where my Cisco ASA is sitting in one facility, providing access to the Internet for two buildings. The two buildings are geographically separated by a Wireless Bridge spanning about 10 miles. All computers and equipment inside the LAN are on the same subnet (its pretty small) and we have WiFi AP's in both locations providing Wired and Wireless access to the LAN. Given all the BYOD (Ipods, and SmartPhones etc...) coming into the office as well as Visiting reps etc... we would like to also provide a non-secure, device independent (the devices cannot see or communicate with each other), and LAN independent (the devices cannot see or use anything on the LAN) HotSpot that anyone could use for their Devices that gives them access to the Internet ONLY without needing a password. I get that this could be possible at the facility with my Cisco if I messed with it and created VLANs etc... but then I would need to get it across my Bridge as well and don't think that would be possible without serious reconfiguration of everything. Would really like some kind of magic drop in solution that can kind of piggy back on my LAN without really needing to do very many if any changes to the current set up.

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  • Issues with "There is already an object named 'xxx' in the database'

    - by Hoser
    I'm fairly new to SQL so this may be an easy mistake, but I haven't been able to find a solid solution anywhere else. Problem is whenever I try to use my temp table, it tells me it cannot be used because there is already an object with that name. I frequently try switching up the names, and sometimes it'll let me work with the table for a little while, but it never lasts for long. Am I dropping the table incorrectly? Also, I've had people suggest to just use a permanent table, but this database does not allow me to do that. create table #RandomTableName(NameOfObject varchar(50), NameOfCounter varchar(50), SampledValue decimal) select vPerformanceRule.ObjectName, vPerformanceRule.CounterName, Perf.vPerfRaw.SampleValue into #RandomTableName from vPerformanceRule, vPerformanceRuleInstance, Perf.vPerfRaw where (ObjectName like 'Processor' AND CounterName like '% Processor Time') OR(ObjectName like 'System' AND CounterName like 'Processor Queue Length') OR(ObjectName like 'Memory' AND CounterName like 'Pages/Sec') OR(ObjectName like 'Physical Disk' AND CounterName like 'Avg. Disk Queue Length') OR(ObjectName like 'Physical Disk' AND CounterName like 'Avg. Disk sec/Read') OR(ObjectName like 'Physical Disk' and CounterName like '% Disk Time') OR(ObjectName like 'Logical Disk' and CounterName like '% Free Space' AND SampleValue > 70 AND SampleValue < 100) order by ObjectName, SampleValue drop table #RandomTableName

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  • Ubuntu server 10.04 disconnects after short periods of inactivity on my site

    - by user57019
    I'm new to Ubuntu (installed it for the first time just a couple of days ago on my server). I've Ubuntu Server 10.04 and am just using the terminal, no GUI like Gnome. So far it's working pretty great except for one big thing. Whenever I go to sleep and there's no activity on my server (it's not a big site so active users drop to 0 during the night), the server kind of disconnects. The only thing that can bring the site back online is to restart the whole server. I've tried disabling powersaving by using setterm but that changes nothing. Even if I wake up the server by pressing any key or so the site wont go back online! I've tried just restarting both Apache and MySQL (I'm using LAMP-server btw) but not even that works. But as soon as I turn the power off and on at the server, everythings work like normal for a couple of minutes of inactivity (~5-15 minutes I'd guess) and then it's down again unless someone logs in to the site and is active. I was previously using XAMPP on my laptop with Windows XP and that worked 24/7 so I don't think it's anything with my router or ISP. This is driving me crazy! My site is down all the time I'm in school as I have no possibility to restart the server if it becomes offline. Does anyone have a clue to what could be wrong?

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  • Locate devices within a building

    - by ams0
    The situation: Our company is spread between two floors in a building. Every employee has a laptop (macbook Air or MacbookPro) and an iPhone. We have static DHCP mappings and DNS resolution so every mobile gets a name like employeeiphone.example.com, every macbook air gets a employeelaptop.example.com and every macbook pro gets a employeelaptop.example.com on the Ethernet interface (the wifi gets a dynamic IP from a small range dedicated for the purpose). We know each and every MAC address of phones and laptops, since we do DHCP static mapping (ISC DHCP server runs on linux). At each floor we have a Netgear stack of two switches, connected via 10GB fiber to each other. No VLANs so far. At every floor there are 4 Airport Extreme making a single SSID network with WPA2 authentication. The request: Our CTO wants to know who is present at which floor. My solution (so far): Every switch contains an table listing MAC address and originating port. On each switch stack, all the MAC addresses coming from the other floor are listed as coming on port 48 (the fiber link). So I came up with: 1) Get the table from each switch via SNMP 2) Filter out the ones associated with port 48 3) Grep dhcpd.conf, removing all entries not *laptop and not *iphone 4) Match the two lists for each switch, output in JSON or XML 5) present the results on a dashboard for all to see I wrote it in bash with a lot of awk and sed, it kinda works but I always have for some reason stale entries in the switch lookup tables, making it unreliable; some people may have put their laptop to sleep, their iphones drop connections after a while, if not woken up and so on..I searched left and right, we are prepared to spend a little on the project too (RFIDs?), does anybody do something similar? I can provide with the script if needed (although it's really specific to our switches and naming scheme). Thanks! p.s. perhaps is this a question for stackoverflow? please move if it so.

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  • processing of Group Policy failed only on 2008 Servers and Name Resolution failure on the current domain controller

    - by Ken Wolfrom
    Spent last 3 months doing a upgrade from 2003 domain to a 2008R2 domain. our last DC was rebuilt (5 total) and brought up on line. After it was put on line we have some 2008 and 2008R2 servers (10 now) getting these errors in the event logs. ERRORS Description: The processing of Group Policy failed. Windows could not resolve the user name. This could be caused by one of more of the following: a) Name Resolution failure on the current domain controller. b) Active Directory Replication Latency (an account created on another domain controller has not replicated to the current domain controller).\ Can duplicate this if we drop to command prompt and run GPUPDATE manually When our users attempt to do a \directory\shared access to shared drive on an affected server get this error.– “THERE ARE CURRETLY NO LOGON SERVER AVAIALBE TO SERICE THE LOGON REQUEST. This is only affecting the 2008 OS and it is a random set of abotu 10 servers out of some 30 with this OS. The Services on the machines are running Ok and login. Able to log in with domain/user to the consoles and via RDP. WE can log onto an affected machine, and can get to the \domainname\sysvol and can see the GPO's Have checked the replication topology of the domain and it states all servers can replicate with no errrors. We went back to the last DC, demoted it, removed DNS and then removed it from the domain and waited 24 hours and issue still persist. Picked one server, removed it from domain, reboooted, and added back to domain with no problems, but still has this behavior. bottom line is we have some servers that the domain will not let any UDP/client server apps or GPO's process ,but the tcp related items seeme to work fine, http, tcp calls, sql and oracle dbs's connect and process. Any inputs on some possible reasons for this issue and fixes. It is only affecting the 2008 servers on a 2008R2 domain.

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  • Shell script to block proftp failled attempt

    - by Saif
    Hello, I want to filter and block failed attempt to access my proftp server. Here is an example line from the /var/log/secure file: Jan 2 18:38:25 server1 proftpd[17847]: spy1.XYZ.com (93.218.93.95[93.218.93.95]) - Maximum login attempts (3) exceeded There are several lines like this. I would like to block any attempts like this from any IP twice. Here's a script I'm trying to run to block those IPs. tail -1000 /var/log/secure | awk '/proftpd/ && /Maximum login/ { if (/attempts/) try[$7]++; else try[$11]++; } END { for (h in try) if (try[h] > 4) print h; }' | while read ip do /sbin/iptables -L -n | grep $ip > /dev/null if [ $? -eq 0 ] ; then # echo "already denied ip: [$ip]" ; true else logger -p authpriv.notice "*** Blocking ProFTPD attempt from: $ip" /sbin/iptables -I INPUT -s $ip -j DROP fi done how can I select the IP with "awk". with the current script it's selecting "(93.218.93.95[93.218.93.95])" this line completely. But i only want to select the IP.

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  • Google Sites (via Apps) setup questions

    - by Dave
    I thought that it would be a piece of cake to set up a Google site via Google Apps, but perhaps my previous (limited) experience with web development has given me unrealistic expectations. I have actually had a really tough time finding help with the exact question that I have, which is: How do I change the home page contents??? You see, I'm used to having hosting with someone like GoDaddy, where I can just ftp in and drop my HTML files in the www folder. From research I have found that this is simply not possible with any flavor of Google Sites. That's fine, I can live with it. So let's say I have www.mydomain.com. When I hit that URL, it redirects me to a very long URL (unfortunately) like https://sites.google.com/a/mydomain.com/sites/system/app/pages/meta/domainWelcome, which just says: Google Apps Welcome to mydomain.com If you are the domain administrator get started creating your home page with Google Sites Great! I want to do that. So I click on the "If you are the..." link and end up at a screen where I can choose a template, a name, and some visibility options. If I click on My Sites, there isn't a "default" site, i.e. the one that www.mydomain.com displays. I figured that maybe I just have to create a site first, so I went ahead and did that. My first test was to create a site that was publicly accessible. I thought that maybe if I did that, the Google would decide that this must be my home page since it's the only one. But it doesn't, and I still get the "Welcome to" page. Under "More Actions", I didn't see anything interesting except for "Manage site". I went in there and had a peek around, and didn't see anything about using this as the default home page. Am I looking for something that just doesn't exist? I can't believe there isn't a way to modify the "domain welcome to" page...

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  • Ubuntu server 10.04 disconnects after short periods of inactivity on my site

    - by Melot
    Hi! I'm new to Ubuntu (installed it for the first time just a couple of days ago on my server). I've Ubuntu Server 10.04 and am just using the terminal, no GUI like Gnome. So far it's working pretty great except for one big thing. Whenever I go to sleep and there's no activity on my server (it's not a big site so active users drop to 0 during the night), the server kind of disconnects. The only thing that can bring the site back online is to restart the whole server. I've tried disabling powersaving by using setterm but that changes nothing. Even if I wake up the server by pressing any key or so the site wont go back online! I've tried just restarting both Apache and MySQL (I'm using LAMP-server btw) but not even that works. But as soon as I turn the power off and on at the server, everythings work like normal for a couple of minutes of inactivity (~5-15 minutes I'd guess) and then it's down again unless someone logs in to the site and is active. I was previously using XAMPP on my laptop with Windows XP and that worked 24/7 so I don't think it's anything with my router or ISP. This is driving me crazy! My site is down all the time I'm in school as I have no possibility to restart the server if it becomes offline. Does anyone have a clue to what could be wrong?

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  • How to find Stolen MacBook with iCloud

    - by user1518089
    My MacBook Air was stolen about 6 weeks ago. Through iCloud and "Find Phone", I have some pictures and a location down to about 2 blocks. The pictures are from the current user taking photos which automatically appear on my local devices. (Yes they probably saw my pictures until I stopped taking them. Yes, they are stupid.) I was thinking about going there and hanging out until I recognized the current users, but it is in a very bad neighborhood and I would be noticed. The police have not done anything. Yes, the MacBook can be locked or a message sent. I am hoping to get it back. Does anyone have ideas on how to track them down? While Find Phone shows their location, it does not report an ip address. Is there a way to get an ip address? Does Facebook face recognition work on strangers? Come on tech geniuses, help me play detective. It does not have Drop Box installed.

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  • RedStation.com is heaven for ddos attackers, How to file complaint?

    - by Ehsan
    Sorry, I don't know where to open this subject. This is not the first time we have faced with a massive DDOS attack from one of servers in RedStation.com and even after we had contacted with their abuse department with it's log there is no cooperation and they don't even like to bother themselves about it. and we don't know how to stop such activity. Do you know how to file complaint against this datacenter? we could not be patient anymore and see they are not care about such things on their network ? it seems like they are heaven for attackers now since they close their eyes to gain more money. I guess some global organization is missing in this matter to investigate such activity and make sure providers are responsible for their services. Here is some of it's log: 2686M 75G DROP all -- * * 31.3-RedStation 0.0.0.0/0 rt: 16167 0.002007 31.3-RedStation -> my-server-ip UDP Source port: 36391 Destination port: 16167 0.002011 31.3-RedStation -> my-server-ip UDP Source port: 38367 Destination port: 16312 0.002014 31.3-RedStation -> my-server-ip UDP Source port: 39585 Destination port: 12081 0.002018 31.3-RedStation -> my-server-ip UDP Source port: 39585 Destination port: 12081 0.002021 31.3-RedStation -> my-server-ip UDP Source port: 38367 Destination port: 16312 0.002025 31.3-RedStation -> my-server-ip UDP Source port: 39585 Destination port: 12081 0.002033 31.3-RedStation -> my-server-ip UDP Source port: 36391 Destination port: 16167 0.002037 31.3-RedStation -> my-server-ip UDP Source port: 38367 Destination port: 16312 0.002040 31.3-RedStation -> my-server-ip UDP Source port: 38367 Destination port: 16312 0.002044 31.3-RedStation -> my-server-ip UDP Source port: 38367 Destination port: 16312 0.002047 31.3-RedStation -> my-server-ip UDP Source port: 39585 Destination Any response would be appreciated

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  • PHP mail() function stopped working on Windows 2008 R2 IIS 7.5. Why?

    - by Karl
    PHP 5.3.13 and as noted IIS 7.5. PHP mail() was working fine until I did 3 things (at the same time). (a) added memory to the server taking it from 4gb to 5gb; (b) ran Windows Update and applied all available updates; (c) removed SQL server installation. Windows 2008 R2 SMTP server still works fine. I know this because I can drop a file in the pickup folder and the mail is delivered. This PHP test script: <?php $to='my_name@another_domain.com'; $subject='Test email using PHP'; $message='This is a test email message'. "\r\n"; $headers='From:[email protected]' . "\r\n" . 'Reply-To:[email protected]' . "\r\n" . 'X-Mailer: PHP/' . phpversion(); mail($to, $subject, $message, $headers, '[email protected]'); ?> creates this entry in the PHP log file: mail() on [C:\www\pgs.com\store\admin\test_php_mail.php:1]: To: my_name@another_domain.com -- Headers: From:[email protected] Reply-To:[email protected] X-Mailer: PHP/5.3.13 PHP's mail.log. When using PHP now, I never see a file dropping on the IIS pickup folder. And on other thing, when using previouly working features on the site (such as password recovery), there is no entry made in the mail.log. (The mail log has just been setup to help solve this problem.) How do I fix this? Or at least how do I diagnose the problem? Thanks.

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  • Configuring iptables rules for HAProxy and others

    - by MLister
    I have the following relevant settings for HAProxy: defaults log global mode http option httplog option dontlognull retries 3 option redispatch maxconn 500 contimeout 5s clitimeout 15s srvtimeout 15s frontend public bind *:80 option http-server-close option http-pretend-keepalive option forwardfor # ACLs ... I have three backends (including a Nginx server) configured in HAProxy, all listening on different ports of 127.0.0.1. And my iptables config is this: *filter # Allows all loopback (lo0) traffic and drop all traffic to 127/8 that doesn't use lo0 -A INPUT -i lo -j ACCEPT -A INPUT -i lo -d 127.0.0.0/8 -j REJECT # Accepts all established inbound connections -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT # Allows all outbound traffic # You can modify this to only allow certain traffic -A OUTPUT -j ACCEPT # Allows HTTP and HTTPS connections from anywhere (the normal ports for websites) -A INPUT -p tcp --dport 80 -j ACCEPT -A INPUT -p tcp --dport 443 -j ACCEPT # Allows SSH connections # # THE -dport NUMBER IS THE SAME ONE YOU SET UP IN THE SSHD_CONFIG FILE # -A INPUT -p tcp -m state --state NEW --dport 22 -j ACCEPT # Allow ping -A INPUT -p icmp -m icmp --icmp-type 8 -j ACCEPT # log iptables denied calls -A INPUT -m limit --limit 5/min -j LOG --log-prefix "iptables denied: " --log-level 7 # Reject all other inbound - default deny unless explicitly allowed policy -A INPUT -j REJECT -A FORWARD -j REJECT COMMIT My questions are: Would the above iptables config work with the settings/options in my HAProxy config? I am also runnning a postgres and a redis server on the same machine, what settings do I need to adjust for these two to enable them work with iptables?

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  • Windows OS level file open event trigger

    - by john
    Colleagues, I have need to run a script/program on certain basic OS level events. In particular when a file in Windows is opened. The open may be read-only or to edit, and may be initiated by a number of means, either from windows explorer (open or ), be selected from a viewing or editing application from the native file chooser, or drag-n-drop into an editing or viewing application. Further, i need the trigger to "hold" the event from completing the action until the runtime on the program has completed. The event handler program may return a pass state, or fail state. If fail state has been returned, then the event must disallow the initially requested action. Lastly, I need to add to the file in question a property or attribute that will contain metadata that will be used by the above event trigger handler program to make a determination as to the pass/fail condition that will ultimately determine if the user is permitted to open the file. Please note that this is NOT a windows event log situation, but one at the OS level file open event. thanks very much for your help. regards, j

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  • windows server 2003 speed issues

    - by farzinSH
    I have a HP server with windows server 2003 and 50 windows XP clients. Since a week and a half the networks speed suddenly drop 2-3 times per day. It gets so slow that none of the clients could work with the HIS program installed on them. We tried so many different things such as replacing the hubs,switches and even some wires. Every time one of these changes solves the problem and the network goes back to its normal state. I checked everything. Even when I disconnected all the clients from the server and connected it to just one computer the problem still remained for 2 hours. I just narrowed down the problem to the couple of likely speculations as follows: viruses? (Updated Kaspersky running on the server shows none) server hardware failure? Physical memory usage on the server? (Because the last time the problem occurred none of the changes above solved the issue so I restarted the server an checked the physical memory usage which was 2 GBs. But I noticed it's increasing over time to over 9 GBs...the server has 16 GBs of RAM.) I surfed the internet and got nothing. Any help would do us a lot....thanks in advance

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  • Methods and practices for managing a network that has no internet connection

    - by FaultyJuggler
    Originally asked in Super User but realized this belongs here. Long story short, I am setting up a network with 32 servers of varying specs that will be used for testing and development. We will be using RedHat Linux, we also do not have a router as of yet and were looking into making one of the servers act as our router/DHCP etc. The small cluster will be on an isolated network with no internet. I can use external harddrives and discs to transfer anything from external sources into machines on the network, so this isn't a locked down secure network, it just won't have a direct connection to the outside world. I've worked on such setups before, but always long after they were setup. So I'm reaching out to see what everyone knows as far as how groups have handled initial setup and maintenance of such a situation. What is the best way to get them all configured and up to date? What are the best ways to automate updates, network wide installs, etc. With the only given that I have large multi-terabyte external hard drives that would be used to drop whatever files are needed onto a central server, how do i then distribute those files and install their contents? I've done perl scripting, some teammates have played with puppet, so we aren't completely in the dark, I just wanted to avoid reinventing the wheel since this is a common challenge.

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  • Display on secondary video card (Nvidia 8400 GS): horrible refresh, bogs system

    - by minameismud
    This is my work computer, but it's a small shop. We do business software development. The most hardcore thing we create is some web animations with html5 and fancy javascript/css. The base machine is a Dell Precision T3500 - Xeon W3550 (3.07GHz quad), 6GB ram, pair of 500GB harddrives, and Win 7 x64 Enterprise SP1. My primary video card is an ATI FirePro V4800 1GB in a PCIe slot of some speed driving a pair of 23s at 1920x1080 through DisplayPort-HDMI adapters. The secondary card is an NVidia GeForce 8400GS in a PCI slot driving a single 17" at 1280x1024 through DVI. On either of the 23" monitors, windows move smoothly, scroll quickly, and are generally very responsive. On the 17", it's slow, chunky, and when I'm trying to scroll a ton of content, Windows will occasionally suggest I drop to the Windows Basic theme. I've updated drivers for both cards, and I've gotten every Windows update relating to video. Specifically: ATI FirePro Provider: Advanced Micro Devices, Inc Date: 6/22/2014 Version: 13.352.1014.0 NVidia 8400 GS Provider: NVIDIA Date: 7/2/2014 Version: 9.18.13.4052 Unfortunately, new hardware isn't really an option. Is there anything I can do software-wise to speed up the NVidia-driven monitor?

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  • Partition Magic 8 made TrueCrypt partition invisible

    - by gmancoda
    Partition Magic 8 took a dump on my TrueCrypt partition... and I let it happen! And now I am left with cleaning up the mess. In short, my encrypted partition is now invisible. TestDisk analysis says of the disk containing the encrypted partition: "Space conflict between the following two partitions". From the googling and searching on various sites, I have learned the following: Hex editing is beyond me. Partition recovery tools are useless. I am not ready to drop the big bucks for professional help. ... that I should have kept an external backup of the Volume header. Now, to get back the volume header, I am planning on recreating the exact same partitions on a new disk of the exact same model, and then encrypting it with the exact same password/keyfiles, and then exporting its volume header to a file. Finally, I hope to be able to restore this volume header on to my damaged drive. Before I undertake this plan, I would like to know if anyone else out there has tried it and, if so, how successful they were. All other suggestions and tips and welcome!! Thanks.

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  • How can I write an excel formula to do row based calculations; where certain conditions need to be met?

    - by BDY
    I am given: An excel sheet contains around 200 tasks (described in rows 2-201 in Column A). Each task can be elegible for a max of two projects (There are 4 projects in total, called "P1-P4" - drop down lists in Columns B and D); and this with a specific %-rate allocation (columns C & E - Column C refers to the Project Column B, and Column E refers to the Project in Column D). Column F shows the amount of work days spent on each task. Example in row 2: Task 1 (Column A); P1 (Column B) ; 80% (Column C) ; P3 (Column D) ; 20% (Column E) ; 3 (Column F) I need to know the sum of the working days spent on Project P3 respecting the %-rate for elegibility. I know how to calculate it for each Task (each Row) - e.g. for Task 1: =IF(B2="P3";C2*F2)+IF(D2="P3";E2*F2) However instead of repeating this for each task, I need a formula that adds them all together. Unfortunately the following formula shows me an error: =IF(B2:B201="P3";C2:C201*F2:F201)+IF(D2:D201="P3";E2:E201*F2:F201) Can anyone help please? Thank you!!

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  • Iptables state tracking

    - by complexgeek
    Hi there. I've just taken over administration of a fairly complex firewall ruleset for a firewall box running Fedora Core 12, and there's one thing about it that is puzzling me. When I run nmap on the gateway from outside the network, I see all the expected services, but also sunrpc on port 111. The INPUT chain has DEFAULT DROP set, and there is no rule allowing port 111. As best I can tell (watching the packet counters before/during/after the scan) it's being allowed by the rule: "-m state --state RELATED,ESTABLISHED -j ACCEPT" but I don't understand why a brand new TCP connection would be considered RELATED or ESTABLISHED. Any suggestions would be greatly appreciated. EDIT: Conntrack modules: nf_conntrack_netlink 14925 0 nfnetlink 3479 1 nf_conntrack_netlink nf_conntrack_irc 5206 1 nf_nat_irc nf_conntrack_proto_udplite 3138 0 nf_conntrack_h323 62110 1 nf_nat_h323 nf_conntrack_proto_dccp 6878 0 nf_conntrack_sip 16921 1 nf_nat_sip nf_conntrack_proto_sctp 11131 0 nf_conntrack_pptp 10673 1 nf_nat_pptp nf_conntrack_sane 5458 0 nf_conntrack_proto_gre 6574 1 nf_conntrack_pptp nf_conntrack_amanda 2796 1 nf_nat_amanda nf_conntrack_ftp 11741 1 nf_nat_ftp nf_conntrack_tftp 4665 1 nf_nat_tftp nf_conntrack_netbios_ns 1534 0 nf_conntrack_ipv6 18504 2 ipv6 279399 40 ip6t_REJECT,nf_conntrack_ipv6 INPUT chain on the filter table: -A INPUT -s 192.168.200.10/32 -p tcp -m tcp --dport 22 -m state --state NEW,ESTABLISHED -j ACCEPT -A INPUT -s 127.0.0.0/8 -i lo -j ACCEPT -A INPUT -p udp -m udp --sport 67:68 --dport 67:68 -j ACCEPT -A INPUT -d 192.168.200.5/32 -i eth0 -j ACCEPT -A INPUT -d 192.168.1.2/32 -i eth0 -j ACCEPT -A INPUT -d {public_ip}/32 -i ppp0 -p tcp -m multiport --dports 22,80,443 -j ACCEPT -A INPUT -d {public_ip}/32 -i ppp0 -p tcp -m multiport --sports 22,25,80,443 -j ACCEPT -A INPUT -d {public_ip}/32 -i ppp0 -p udp -m udp --dport 1194 -j ACCEPT -A INPUT -d {public_ip}/32 -i ppp0 -p udp -m udp --sport 1194 -j ACCEPT -A INPUT -d {public_ip}/32 -i ppp0 -p udp -m multiport --sports 53,123 -j ACCEPT -A INPUT -d {public_ip}/32 -i ppp0 -p icmp -m icmp --icmp-type 8 -j ACCEPT -A INPUT -i eth0 -m state --state NEW -j ACCEPT -A INPUT -d {public_ip}/32 -m state --state NEW -j ACCEPT -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT eth0 is connected to the internal network, eth3 is connected to an ADSL modem in bridge mode, ppp0 is the WAN connection tunneled over eth3.

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