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  • Does a USB hub affect performance?

    - by user1018733
    I have two devices I want maximum throughput and latency with. (Midi drums and midi keyboard for example) Would connecting both to the same USB port via a hub effectively limit the maximum data transfer rate to 1/2 to each of them? I am assuming yes, but I didn't know if USB hubs had a handshaking and priority giving protocol available (e.g. let the device with the longer built up buffer of data communicate first) Thanks

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  • kerberos NTLM authentication

    - by rockbala
    Hi, Where can I check in Windows Server 2008 that Kereberos/NTLM is the authentication protocol used after the whole network is set up/installed. There is only 1 domain controller with AD services and is not affiliated with any other domains. Regards, Balaji S

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  • Tomcat startup fails with not a valid identifier

    - by Nigel
    I have tomcat 6.0.18 running on one server without a problem. With the exact same settings it fails to launch on my colleague's machine. He's even running from the same folder as me (I've stopped my copy while he tries to make it work) All we get when we fire off tomcat using bin/startup.sh is this: CATALINA_OPTS=-server -Xms768m -XX:+UseParallelGC -Xmx768m -XX:MaxPermSize=256m -XX:PermSize=128m -Djava.awt.headless=true: is not an identifier I had that definition in setenv.sh and moved it into startup.sh - same problem. Any suggestions? My brief look on google seem to indicate multiple IP address issues, but my server has two ethernet cards, and two IP addresses. Thanks.

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  • books about Firewall development

    - by VP
    Hi, i was just asked today, but i couldn't answer precisely so that's why i'm asking here :-) There is any book about Firewall design and implementations (Unix environment and C)? For sure, i could recommend TCP/IP books, and what i did, but there is some design decisions, that are not related with TCP/IP. For sure, i said about the netfilter/iptables (RTFSC) but as well we cannot assume that the netfilter/iptables is the best approach since we don't have too many baselines (ok, we could compare it with PF, but again, read source code to understand design decisions is not always the best way). So if anybody knows a book about this theme, please shoot it!

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  • Getting a permission error when trying to connect to sql database

    - by Matt
    I have a sql server on a dedicated machine, running SQL 2008. I have the IP of the box, a database setup on it. I've built a small script that just does a connection test, and when I run it, I get the following error. Request for the permission of type 'System.Data.SqlClient.SqlClientPermission, System.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed. I've been told by the admin that SQL remote access has been granted for my IP address. Anybody know what's wrong?

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  • checksum error with building an HTTP packet(but over TCP, like syn/ack its ok)

    - by Hila
    I am building a NAT program,I change each packet that comes from our internal subnet, change it's source IP address by libnet functions.( catch the packet with libpcap, put it sniff structures and build the new packet with libnet) I am trying to build an http packet. When I look on wireshark, I see that the new packet that I have built is exectly like the original packet(the only diffrent is that I changed the src port and ip), but there is a checksum error, So the server don't do anything with the packet that I have sent to him, beacuse the cheksum field is wrong. When I send a tcp packet(like syn or ack), the checksum is ok, and the server respons. Is anyone knows what can cause this problem? the new checksum in other packets is calculated as it should be.. but in the HTTP packet it doesn't..

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  • What is the best way to secure a shared git repo for a small distributed team ?

    - by ashy_32bit
    We have a Scala project and we decided to use git. The problem is we are a very small distributed team and we want nobody outside of the team to have even the read only access to our git server (which has a valid IP and is world-accessible in the IP level). I have heard the git-daemon has no authentication mechanism by itself and you should somehow integrate it with ssh or something. What is the best (and easiest) way to make the git server respond only to authorized users ? Or perhaps git-daemon is not for this task ? I may add that I am looking for a simple and straightforward approach. I don't want to compete with github ;-)

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  • postgresql count

    - by dars
    Can this be done in PGSQL? I have a view which I created where hostname,ip, and datacenter are from one table, and ifdesc and if stats from another table. the view output looks like this: hostname | ip | datacenter | ifdesc | ifadminstat | ifoperstat| ---------- ------------------------------------------------------------------ r1 1.1.1.1 dc GigabitEthernet1/1 2 1 r1 1.1.1.1 dc GigabitEthernet1/2 2 2 r1 1.1.1.1 dc GigabitEthernet1/3 2 2 r1 1.1.1.1 dc GigabitEthernet1/4 2 1 r1 1.1.1.1 dc GigabitEthernet2/1 2 2 r1 1.1.1.1 dc GigabitEthernet2/2 2 2 r2 2.2.2.2 dc GigabitEthernet1/1 2 2 r2 2.2.2.2 dc GigabitEthernet1/2 2 2 I need to get a count of "ifadminstat = 2" and "ifoperstat = 2" for all interfaces on each blade, for each router (for example... for r1, how many interfaces on blade 1 (GigabitEthernet1/1-48) have "ifadminstat = 2" and "ifoperstat = 2". I am trying to do the counting in Postgresql then present the results on a website using PHP.

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  • If a server is performing slowly, will ping still appear normal?

    - by blarg
    I'm trying to troubleshoot a periodic slow application problem without direct access to the network. There is a server on one network providing webpages to a VLAN on a different network via a DMZ. I'm told that when the pages were loading slowly the user pinged the server and saw an extremely slow response time. My question is, as ping is minimal in network load and a different protocol from the pages, would a slow ping be caused by a slow server, or would it indicate a slow network?

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  • Shell Scripting For loop Syntax Error

    - by NewShellScripter
    Hello, I am trying to make a simple shell script to ping a source but I am getting bash-2.03$ ./test.sh google.com 10 .5 /home/users/me 16 256 ./test.sh: line 35: syntax error near unexpected token `((' ./test.sh: line 35: `for (( i = 1 ; i <= $totalArguments ; i++ ))' This is the code: #!/bin/bash ip=$1 count=$2 interval=$3 outputDirectory=$4 shift; shift; shift; shift; totalArguments=$# for (( i = 1 ; i <= $totalArguments ; i++ )) do ping -c $count -i $interval -s ${!i} $ip >> $outputDirectory/${!i}results.txt done Can someone tell me what I am doing wrong with the for loop syntax? Thanks!

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  • iPhone: Waiting until selectrow animation finishes before pushing viewcontroller?

    - by Mike
    My code looks like this: NSIndexPath *ip = [NSIndexPath indexPathForRow:15 inSection:0]; [[self tableView] selectRowAtIndexPath:ip animated:YES scrollPosition:UITableViewScrollPositionMiddle]; // Pause needed here until animation finishes [[self navigationController] pushViewController:secondView animated:YES]; Right now it animates the scroll/selection of the row and pushes the view controller at the same time. What I would like it to do is wait until it finishes the scroll/selection and then push the view controller. Is there any possible way of doing this? Thanks

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  • Preventing dictionary attacks on a web application

    - by Kevin Pang
    What's the best way to prevent a dictionary attack? I've thought up several implementations but they all seem to have some flaw in them: Lock out a user after X failed login attempts. Problem: easy to turn into a denial of service attack, locking out many users in a short amount of time. Incrementally increase response time per failed login attempt on a username. Problem: dictionary attacks might use the same password but different usernames. Incrementally increase response time per failed login attempt from an IP address. Problem: easy to get around by spoofing IP address. Incrementally increase response time per failed login attempt within a session. Problem: easy to get around by creating a dictionary attack that fires up a new session on each attempt.

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  • MySQLi insert into prepare error

    - by JPM
    Hi I inserted a lot of stuff into a mysql databse. But now I get an error in the prepare statement. I see Database prepare error. What am I doing wrong? This is my Code: $sql = "INSERT INTO Contact (IP,To,Name,Email,Subject,Text) VALUES ( ?, ?, ?, ?, ?, ? ) "; if (!$stmt = $db->prepare($sql)) { echo 'Database prepare error'; exit; } $stmt->bind_param('ssssss', $ip_contact, $to_contact, $name_contact, $email_contact, $subject_contact, $text_contact); if (!$stmt->execute()) { echo 'Database execute error'; exit; } $stmt->close(); My SQL table looks like this: Contact: - ID int(11) auto_increment primary key - IP varchar(15) - To varchar(5) - Name varchar(20) - Email varchar(20) - Subject varchar(20) - Text varchar(600)

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  • How can I retrieve cookies for webserver A when my project is deployed on webserver B?

    - by medopal
    The project is multiple modules, each of them is deployed to a separate webserver. All of them on the same mainframe. (same IP address) I have a main menu where I login and then list all the available modules on all servers. From here I can click and go to any of them modules. I send cookies in the response (when logging in, say Server A), then on Server B (one of the modules) when I want to go back to the main menu, I check the cookies to see if the user is logged in. The problem is, Server B isn't seeing cookies generated by Server A. So each time I return to main menu, the user will be logged out. Is there anyway to store cookies to be used by multiple virtual webservers (on same IP) or any other idea?

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  • Effective way of String splitting

    - by openidsujoy
    I have a completed string like this N:Pay in Cash++RGI:40++R:200++T:Purchase++IP:N++IS:N++PD:PC++UCP:598.80++UPP:0.00++TCP:598.80++TPP:0.00++QE:1++QS:1++CPC:USD++PPC:Points++D:Y++E:Y++IFE:Y++AD:Y++IR:++MV:++CP:~ ~N:ERedemption++RGI:42++R:200++T:Purchase++IP:N++IS:N++PD:PC++UCP:598.80++UPP:0.00++TCP:598.80++TPP:0.00++QE:1++QS:1++CPC:USD++PPC:Points++D:Y++E:Y++IFE:Y++AD:Y++IR:++MV:++CP: this string is like this It's list of PO's(Payment Options) which are separated by ~~ this list may contains one or more PO contains only Key-Value Pairs which separated by : spaces are denoted by ++ I need to extract the values for Key "RGI" and "N". I can do it via for loop , I want a efficient way to do this. any help on this.

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  • Raw socket implementation in windows?

    - by krishnakumar
    I need to create TCP/IP headers manually for my application. For that i used Raw socket. My system os is win xp (SP3). My code compiles fine :) but it throws a run time error: Initialising Winsock...Initialised successfully. Creating Raw TCP Socket...Raw TCP Socket Created successfully. Setting the socket in RAW mode...Successful. Enter hostname : 192.168.1.152 Resolving Hostname...Resolved. Enter Source IP : 192.168.1.151 Sending packet... Error sending Packet : 10022 I have set IP_HDRINCL to 1. What am i doing wrong? I switched off the firewall too but still get the same result.

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  • How to figure out why ssh session does not exit sometimes?

    - by WilliamKF
    I have a C++ application that uses ssh to summon a connection to the server. I find that sometimes the ssh session is left lying around long after the command to summon the server has exited. Looking at the Centos4 man page for ssh I see the following: The session terminates when the command or shell on the remote machine exits and all X11 and TCP/IP connections have been closed. The exit status of the remote program is returned as the exit status of ssh. I see that the command has exited, so I imagine not all the X11 and TCP/IP connections have been closed. How can I figure out which of these ssh is waiting for so that I can fix my summon command's C++ application to clean up whatever is being left behind that keeps the ssh open. I wonder why this failure only occurs some of the time and not on every invocation? It seems to occur approximately 50% of the time. What could my C++ application be leaving around to trigger this?

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  • What are some ways to identify a logged in user on the web?

    - by farinspace
    Here is the scenario: There are 5 websites (different domain names) that need to share a session. I am using a bit of code on each site which returns a "blank.gif" image and at the same time sets the session (syncing it up to the current session). Each of the sites calls a session-img from each of the other sites. Also, all sites have access to the same database (where the session is stored). This works great on FF and Chrome, but not on IE (or Safari PC)... I need to come up with an alternative method to keep a session active? The app is a small custom CMS, so really only 2-3 people will be using it. I can probably identify user logins by IP and then continue to check for the IP accross all sites... Is there something more granular such as a computer uuid that i can check for?

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  • mysqli insert into database

    - by Simon
    Hello all i have this script and i will not insert into the database and i get no errors :S, do you know what it is? function createUser($username, $password) { $mysql = connect(); if($stmt = $mysql->prepare('INSERT INTO users (username, password, alder, hood, fornavn, efternavn, city, ip, level, email) VALUES (?,?,?,?,?,?,?,?,?,?)')) { $stmt->bind_param('ssssssssss',$username,$password, $alder, $hood, $fornavn, $efternavn, $city, $ip, $level, $email); $stmt->execute(); $stmt->close(); } else { echo 'error: ' . $mysql->error; }

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  • How to change user for more rights on a SFTP client?

    - by Zenklys
    It is always suggested on first step to disable the remote root login for the SSH protocol. I have a low-right user able to connect via SSH and once connected, I simply su in order to gain more rights. Now when using a sFTP client, I use my low-right user and am thus able to do next to nothing. My question is : Is it possible to change user after login using 3rd party client, such as Transmit, Cyberduck, Filezilla ? PS : Mac clients would be great ;)

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  • Windows Server 2003

    - by user229133
    I have a website that is using Windows Server 2003. The site is called https://mysite.com/ and at ip address 111.1.1.1. Now when I log into the site all my relative links that are generated using NavURL (<%# NavURL("Images/Menu/img.gif")%) are saying "http://111.1.1.1/Images/Menu/img.gif" instead of "https://mysite.com/Images/Menu/img.gif". This is causing an error because it needs to be secure. I'm sure there is a setting on the server somewhere to point to the name and not the ip, but I don't know where. Thanks for your help.

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  • OpenSSH (Windows) does not forward X11

    - by Shulhi Sapli
    I'm running Ubuntu 13.04 in VM and I wanted to do X11 forwarding to my host (Win 8), so far it works fine using PuTTY and XMing server for Windows. But I am curious why it doesn't work if I use OpenSSH binaries (it comes together with Git for windows). This is what I've done so far: ssh -X [email protected] (also tried with -Y) then gedit but received error of Cannot open display. echo $DISPLAY came out as empty. So, I try to export DISPLAY=localhost:0.0 but it still won't work. The DISPLAY environment that I set is exactly as when it runs with Putty. I also try changing the DISPLAY to 192.168.2.3:0.0 and other display number as well, but still it won't work. Of course I could just use Putty to make it work, but I was wondering why OpenSSH binaries does not work. I have enabled all settings required in both /etc/ssh/ssh_config and /etc/ssh/sshd_config. If I run with -v option, this is what I get F:\SkyDrive\Projects> ssh -X -v [email protected] OpenSSH_4.6p1, OpenSSL 0.9.8e 23 Feb 2007 debug1: Connecting to 192.168.2.3 [192.168.2.3] port 22. debug1: Connection established. debug1: identity file /c/Users/Shulhi/.ssh/identity type -1 debug1: identity file /c/Users/Shulhi/.ssh/id_rsa type -1 debug1: identity file /c/Users/Shulhi/.ssh/id_dsa type -1 debug1: Remote protocol version 2.0, remote software version OpenSSH_6.1p1 Debian-4 debug1: match: OpenSSH_6.1p1 Debian-4 pat OpenSSH* debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_4.6 debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug1: kex: server->client aes128-cbc hmac-md5 none debug1: kex: client->server aes128-cbc hmac-md5 none debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP debug1: SSH2_MSG_KEX_DH_GEX_INIT sent debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY debug1: Host '192.168.2.3' is known and matches the RSA host key. debug1: Found key in /c/Users/Shulhi/.ssh/known_hosts:2 debug1: ssh_rsa_verify: signature correct debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug1: SSH2_MSG_NEWKEYS received debug1: SSH2_MSG_SERVICE_REQUEST sent debug1: SSH2_MSG_SERVICE_ACCEPT received debug1: Authentications that can continue: publickey,password debug1: Next authentication method: publickey debug1: Trying private key: /c/Users/Shulhi/.ssh/identity debug1: Trying private key: /c/Users/Shulhi/.ssh/id_rsa debug1: Next authentication method: password [email protected]'s password: It seems that there is no request for X11 (I'm not sure if there is should be one too here). Any pointers why it doesn't work?

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  • URL losing port number in every page load

    - by MarceloRamires
    I'm currently taking care of a certain local website. The default port has been changed, and can no longer be not included in the URL due to technical reasons, so now i'm using a certain port in the end of the IP at the URL, for example 100.100.100.100/website.asp no longer works 100.100.100.100:10/website.asp with the port, works. Works, though I can't click in any link or anything and the port vanishes (new page doesn't load). Then I keep the same URL and just include the port at the end of the IP and it works again, until I click in another link inside of it. I have access to changing each link, but I guess that would not be the right approach. How should I procceed ?

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