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  • Error! File In use: SQLSERVER

    - by Asad Butt
    I am trying to copy a database from one folder to another. There is no program at all running except operating system.(I mean all windows shut) I keep getting this : The action cannot be completed because the file is open is another program close file and try again Try again, Try again , Try again ......... what the hell on earth is holding that file and how can I carry on with copy / delete / overwrite files(DB) as this problem is something very common. Thanks

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  • Symlink error when installing MySQL via Homebrew

    - by Asad Syed
    Trying to install MySQL via Homebrew. The install seems to work fine but i get an error: "Error: The linking step did not complete successfully The formula built, but is not symlinked into /usr/local You can try again using `brew link mysql'" Naturally, after this I ran: brew link mysql Which spat out: Error: Could not symlink file: /usr/local/Cellar/mysql/5.5.20/include/typelib.h /usr/local/include is not writable. You should change its permissions. So I ran it with sudo and got a "cowardly refusing to brew link mysql".

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  • Rate-Limit affects All clients or single IP?

    - by Asad Moeen
    Well up-til now I've considered iptables rate-limit commands with the "recent" module to work for each IP Address. For example rate-limit rule of 20k/s will trigger only if a single IP exceeds 20k/s rate and not if 4 different IPs exceed 5k/s rate. Please correct me if I considered this wrong as I've only used these rules for TCP/ UDP. But today I tried similar rules for ICMP and applied 4/s Input/Output. But then on trying to ping-test from just-ping.com I could see packet loss on almost all IP Addresses. How could that happen because if it worked for each IP Address then it wouldn't be triggering the rule because I believe each IP from just-ping has a rate of probably 1/s. I still think the first one is true because if it wasn't then my GameServer would block everyone if the combined rate ( in case of more connected players ) increased the threshold. This hasn't happened up til now so the ICMP thing really confused me. Thank you.

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  • Socks5 proxy "Dante" leaves many child processes stuck in FIN_WAIT2 / CLOSE_WAIT state

    - by Asad R.
    I'm running dante v1.2.1 as a SOCKS proxy server. The proxy works fine but at the end of the day there are around 40-50 or more child processes of sockd running even though there are no active connections. lsof shows that the child processes all have sockets in the CLOSE_WAIT and FIN_WAIT2 state. These child processes stay in this state unless I manually killall/restart the daemon. I'm running Gentoo Linux on a 2.6.24-23-xen kernel. I recently upgraded from dante v1.1.19-r4 which was giving me the exact same problem. Is this a configuration issue with Dante, my system, or is it a coding issue in the dante code?

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  • Expert iptables help needed?

    - by Asad Moeen
    After a detailed analysis, I collected these details. I am under a UDP Flood which is more of application dependent. I run a Game-Server and an attacker is flooding me with "getstatus" query which makes the GameServer respond by making the replies to the query which cause output to the attacker's IP as high as 30mb/s and server lag. Here are the packet details, Packet starts with 4 bytes 0xff and then getstatus. Theoretically, the packet is like "\xff\xff\xff\xffgetstatus " Now that I've tried a lot of iptables variations like state and rate-limiting along side but those didn't work. Rate Limit works good but only when the Server is not started. As soon as the server starts, no iptables rule seems to block it. Anyone else got more solutions? someone asked me to contact the provider and get it done at the Network/Router but that looks very odd and I believe they might not do it since that would also affect other clients. Responding to all those answers, I'd say: Firstly, its a VPS so they can't do it for me. Secondly, I don't care if something is coming in but since its application generated so there has to be a OS level solution to block the outgoing packets. At least the outgoing ones must be stopped. Secondly, its not Ddos since just 400kb/s input generates 30mb/s output from my GameServer. That never happens in a D-dos. Asking the provider/hardware level solution should be used in that case but this one is different. And Yes, Banning his IP stops the flood of outgoing packets but he has many more IP-Addresses as he spoofs his original so I just need something to block him automatically. Even tried a lot of Firewalls but as you know they are just front-ends to iptables so if something doesn't work on iptables, what would the firewalls do? These were the rules I tried, iptables -A INPUT -p udp -m state --state NEW -m recent --set --name DDOS --rsource iptables -A INPUT -p udp -m state --state NEW -m recent --update --seconds 1 --hitcount 5 --name DDOS --rsource -j DROP It works for the attacks on un-used ports but when the server is listening and responding to the incoming queries by the attacker, it never works. Okay Tom.H, your rules were working when I modified them somehow like this: iptables -A INPUT -p udp -m length --length 1:1024 -m recent --set --name XXXX --rsource iptables -A INPUT -p udp -m string --string "xxxxxxxxxx" --algo bm --to 65535 -m recent --update --seconds 1 --hitcount 15 --name XXXX --rsource -j DROP They worked for about 3 days very good where the string "xxxxxxxxx" would be rate-limited, blocked if someone flooded and also didn't affect the clients. But just today, I tried updating the chain to try to remove a previously blocked IP so for that I had to flush the chain and restore this rule ( iptables -X and iptables -F ), some clients were already connected to servers including me. So restoring the rules now would also block some of the clients string completely while some are not affected. So does this mean I need to restart the server or why else would this happen because the last time the rules were working, there was no one connected?

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  • Dos/ Flood Lag even though Port not Saturated

    - by Asad Moeen
    My GameServers had been under some UDP Floods due to which they generated outputs to the attacker which gave the GameServers some huge lags. Thanks to friends at ServerFault that upon different kind of testing, I was able to successfully block the attack. My question is actually something else but it is important to know how the GameServers reacted to the attack and if the machine kept stable or not: 300kb/s Input would cause GameServer to generate 2mb/s Output. So as the Input Rate kept increasing, output rate would reach so high that it would no longer be possible for the GameServer to control it and hence it would give a huge Lag until the attack is stopped. Usually the game server starts to lag when it sends out something greater than 5mb/s and under that is controllable. Theoretically, I was able to receive a 60mb/s output from my GameServer on inputting 10mb/s. Its just the way the GameServer works if not protected. Now on some of my machines, only the GameServer under attack lagged and although the server was generating 60mb/s output, rest of the gameservers on other ports would run fine without lags on the same machine. But there was another machine which also runs on a 100 MBPS Network port, even 1 mbps input ( and ZERO output because attack is blocked ) even on an unused port would give a constant yellow line ( on the Lag-o-Meter ) to all the clients on all GameServers indicating lag because that line is actually blue under normal conditions. It would remain the same even on 50mbps or 900mbps input. I tried contacting the host about it because I believe its the way their Network is bridged, but they can't help me about it. Anyone else knowing about such issues because if 900mbps input does not Saturate the port, how can 1mbps input lag the servers although port is not saturated and enough bandwidth is available?

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  • PSAD Firewall/ UDP flood?

    - by Asad Moeen
    Well I'm actually trying to block a UDP Flood on the Application port because the string "getstatus" is causing my application to make large output due to a small input to the attacker's IP. I installed PSAD firewall to do the job. psad -S shows 3000,000 logged packets at the application port and top ports in Scan but does not block the IP of the attacker however other IP Addresses with small number of connections are dropped. I'm thinking that since output is also being made to the attacker, this is why its not getting blocked because iptables rate-limiting is also exactly doing the same thing and not blocking the IP where outgoing connection is also made. Any guesses why it won't work?

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  • Substiting a line through PHP in SSH

    - by Asad Moeen
    I've already setup SSH usage in PHP and most of the things work. Now what I want to do is that I'm looking to edit a line in a file and replace it back. It works directly on the server but can't seem to get it working with PHP files. Here is what I'm trying. $new_line1 = 'Line $I want to add - The $I has to go into the file as it is'; $new_line2 = 'Ending $text of the line - $text again goes into file; $query = "Addition to line"; $exec1= 'cd /root; perl -pe "s/.*/' ; $exec2= '/ if $. == 37" Edit.sh > Edited.sh'; $new="$exec1$new_line1$query$new_line2$exec2"; $edit="cd /root/mp; cp Edited.sh Edit.sh"; echo $ssh->exec($new); echo $ssh->exec($edit); Now the thing is that running the perl command directly in SSH works without any errors but when I run this through PHP I get the error: Substitution replacement not terminated at -e line 1. I want to know why would it work this way and not that?

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  • IPtables - Accept Arbitrary Packets

    - by Asad Moeen
    I've achieved a lot on blocking attacks on GameServers but I'm stuck on something. I've blocked major requests of game-server which it aceepts in the form "\xff\xff\xff\xff" which can be followed by the actual queries like get status or get info to make something like "\xff\xff\xff\xff getstatus " but I see other queries if sent to the game-server will cause it to reply with a "disconnect" packet with the same rate as input so if the input rate is high then the high output of "disconnect" might give lag to the server. Hence I want to block all queries except the ones actual clients use which I suppose are in the form "\xff\xff\xff\xff" or .... so, I tried using this rule : -A INPUT -p udp -m udp -m u32 ! --u32 0x1c=0xffffffff -j ACCEPT -A INPUT -p udp -m udp -m recent --set --name Total --rsource -A INPUT -p udp -m udp -m recent --update --seconds 1 --hitcount 20 --name Total --rsource -j DROP Now where the rule does accept the clients but it only blocks requests in the form "\xff\xff\xff\xff getstatus " ( by which GameServer replies with status ) and not just "getstatus " ( by which GameServer replies with disconnect packet ). So I suppose the accept rule is accepting the simple "string" as well. I actually want it to also block the non-(\xff) queries. So how do I modify the rule?

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  • PHP / SSH2 Multi-threading

    - by Asad Moeen
    I'm basically done using SSH2 with PHP. Some may already that while using it, the PHP code actually waits for all the listed commands to be executed in SSH and when everything is done, it then gives back the results. Where that is fine for the work I am doing, but I need some commands to be multi-threaded. $cmd= MyCommand; echo $ssh-exec($cmd); So I just want this to run in parallel 2 times. I googled some stuff but didn't get along with it. For a basic thing, I came across to this way posted by someone but it didn't work out for me. for ($i = 0; $i < 2; $i += 1) { exec("php test_1.php $i > test.txt &"); //this will execute test_1.php and will leave this process executing in the background and will go to next iteration of the loop immediately without waiting the completion of the script in the test_1.php , $i is passed as argument . } I tried to put it this way exec("echo $ssh-exec($cmd) $i test.txt &"); in the loop but either it never entered the loop or the echo $ssh-exec failed. I don't really need a very neat multi-threading. Even a single second delay would do good, thank you.

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  • Sonicwall networking

    - by Syed
    My Sonicwall LAN subnet is 192.168.1.0/24 X0: LAN IP 192.168.1.253 I also have intranet router 192.168.1.108 routing to 192.168.2.0/24 network. Internet is through WAN (X1) is all working fine. My LAN PC's can connect to intranet 192.168.2.0/24 via static route from LANsubnet to 192.168.2.0/24 as 192.168.1.108 as gateway. Now I have LAN2 10.2.1.254 (10.2.1.0/24)on X4 port. I can access Internet from LAN2, now I want to allow intranet from LAN2. What static routes do I need to make this work?

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  • OS X multiple use of same machine via VNC

    - by Hassan Syed
    I'm wondering if I can connect to my wife's mac via VNC while she is logged in herself. I wouldn't be surprised if this isn't possible, although the machinery should be there with "fast-user-switching" support. So, if I create a profile for myself and I log in (and enable the VNC server/sharing for my profile), and then my wife switches to her own account which she uses on the physical console. Will I be able to use the mac ?

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  • Integrating BizTalk Server and StreamInsight paper

    - by gsusx
    With all the holidays madness I didn't realized that my "Integrating BizTalk Server and StreamInsight" paper is now available on MSDN . This paper was originally an idea of the BizTalk product team and intends to present some fundamental scenarios that can be enabled by the combination of BizTalk Server and StreamInsight. Thanks to everybody who, directly or indirectly, provided feedback about this paper: Syed Rasheed, Mark Simms , Richard Seroter , Roman Schindlauer and Torsten Grabs from the StreamInsight...(read more)

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  • New Best-in-Class Solutions in Supply Chain Planning - Part 2

    Hear Nadeem Syed, Oracle Group Vice President, Advanced Planning Products discusst Oracle's recently announced best-in-class Supply Chain Planning solutions: Advanced Planning Command Center, Demand Signal Repository, Spare Parts Planning and Manufacturing Operations Center. Gain an understanding of the capabilities of these ground-breaking planning solutions and what types of enterprises can benefit from them.

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  • New Best-in-Class Solutions in Supply Chain Planning - Part 1

    Hear Nadeem Syed, Oracle Group Vice President, Advanced Planning Products discusst Oracle's recently announced best-in-class Supply Chain Planning solutions: Advanced Planning Command Center, Demand Signal Repository, Spare Parts Planning and Manufacturing Operations Center. Gain an understanding of the capabilities of these ground-breaking planning solutions and what types of enterprises can benefit from them.

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  • custom events in child userControls c# .net or Child to Parent Communication in UserControls

    - by Asad Malik
    Okay here is the scenario: I have a parent "SalesUC" UserControl which contains a "itemDetailsUC" UserControl, as well as a status label. (plz see sample below) What I want: If there occurs any exception in itemDetailsUC, it should be able to communicate the exception text to parent control (i.e. SalesUC). Remember: the "ItemDetailsUC" is also used in other controls that may or may not have status label. any suggestions, answers... please. Framework: .net 3.0/3.5 Language: c# Domain: Windows Application, WinForms, etc. Sample ScreenShot regards.

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  • Alternative to Turbo C

    - by Asad Jibran Ahmed
    My university is hosting a Programming Competition, and have decided to support Turbo C (the 16-bit DOS version) as a valid programming environment. I have just read that PC^2, the software that is going to be used to auto-judge the competition, does not support 16-bit programs. So, is there any alternative to Turbo C that I can use. I need the same header files, and the compiler would need to support all the outdated C standards that Turbo C supports. But the output needs to be 32-bit. Is there any compiler that can satisfy these conditions?

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  • Microsoft Quotation

    - by Asad Jibran Ahmed
    I don't know if this is the right place to ask this question, but I honestly have exhausted my self searching for the last hour. I am looking for a quotation made about Microsofts software. It goes something along the lines of: "They may make 2nd grade crappy software, but by God they know how to design interfaces" It was by a somewhat popular open source personality about the lack of good interface design in open source software. Does any one know the exact quotation? It will be a great help if someone can point me in the right direction.

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  • Lambda Expressions

    - by Asad Khan
    Can somebody explain me lambda expressions & what they can be used for. I have googled for it & have a rough idea. most of the examples give c# code. How about lambda expressions in plain old C...?

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  • why licenced code is packed and then is reviewable using Disassembler at the same time ?

    - by Asad Butt
    Is it legal / ethical to copy code for any reason, or utilize it (like code review) from the .Net framework or any other .Net based API using Reflector or similar tools ? If it is, what advantages do Microsoft and other licence based softwares have for packing there code ? If it is not, Why can we use ILDasm and Reflector ? Another way of saying this is Why to pack it up if it is fine to review it ? probably I am missing some bits in the question, any one who feels, could ask this question in a better way, is most welcome to edit. Thanks

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  • When making a branch in TortoiseSVN, what do "head", "working copy", and "specific" revisions mean?

    - by Asad Butt
    A new user of Tortoise SVN, working over source control. I have a Visual Studio solution which consists of 5 webAppliation projects. I need to take one out and work over it in a branch. When I try to branch it, It is asking me of one of these options head revision in repository specific revision in repository working copy revision Problem 1: What exactly are these ? I am confused with "head revision" and "working copy", as they appear same to me. EDIT: Problem 2: Why cant we branch from Repository GUI itself, (would be head revision) ? Problem 3: Can you list the steps, needed to branch from a directory !

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