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  • Wake for Network Access Apache servr in OS X 10.8, followup

    - by Gary
    Sorry, I can't seem to post this response within the same thread. Thank you both (Zoredache and Gordon) for your answer. But the fix seems temporary. I entered the command you suggested, and it seemed to work: ...smith$ Registering Service ApacheNoDoz._http._tcp.local port 80 DATE: ---Fri 14 Sep 2012--- 12:04:15.813 ...STARTING... 12:04:16.566 Got a reply for service ApacheNoDoz._http._tcp.local.: Name now registered and active So, I checked for it on my G5: Browsing for _http._tcp Timestamp.....A/R Flags if Domain......Service Type...Instance Name (lots of Bonjour printers omitted)... 12:07:38.370..Add.....2..4 local.......... _http._tcp.........ApacheNoDoz 12:07:45.921..Rmv.....0..4 local..........._http._tcp.........ApacheNoDoz So, it was running at 12:07:38, at which time the host was asleep. But, shortly after, the activity seems to have been removed. I don't know why. Does this mean that I can never let the cpu sleep, or is there something else I have to set? Thanks, again.

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  • Windows Server 2008 R2 loses ability to connect to network share

    - by JamesB
    I could sure use some help with this one: I've got two Windows Server 2008 R2 x64 Terminal Servers, as well as several 2003 servers (DNS / Wins / AD / DC). On the two 2008 boxes, every now and then they will get in this mode where you can't map a drive to a random server. I say random server because it's not always the same server that you can't map to. Here is a summary of what I can and can't do: net view \\servername Sometimes this works, sometimes it does not. net view \\FQDN This always works. net view \\IPAddress This always works. ping servername Sometimes this works, sometimes it does not. ping FQDN This always works. ping IPAddress This always works. I've been looking all over for a solution to this. It sure seems like Microsoft would have a hotfix by now. The kicker to this is that it sometimes works great, especially after a reboot. It may run for 2 weeks just fine, but all of a sudden it will fail to resolve the remote server name. It will then be this way for a few days, then it might start working again. Also, while it's in the mode of not working, the other servers have no problem getting there. It's just these 2008 R2 Terminal Servers. Setting a static entry in the Hosts file and LMHosts does not make it work. All servers have static IPs and they are registered in DNS and Wins just fine. Here is a long thread on MS Technet of the exact same problem, but they don't have a good solution. Here is their workaround (It was from June of 2010): Good news - a hotfix is in the works and a workaround has been identified: Root cause is that since this is SMB1 all user sessions are on a single TCP connection to the remote server. The first user to initiate a connection to the remote SMB server has their logon-ID added to the structure defining the connection. If that user logs off all subsequent uses of that TCP session fail as the logon-id is no longer valid. As a workaround for now to keep the issue from happening you will want to have the user not logoff the Terminal Server only disconnect their sessions. Any word from anyone out there about a solution? Any help would sure be appreciated. Thanks, James

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  • Please recommend good books for telemetry / SCADA system design & programming

    - by Mawg
    I am looking at several projects, all with roughly the same fucntionality. Some instruments collect some data (or control some functionality). They commmunicate by Internet (Etehrnet/wifi/GPRS/sasatellite) with a databse server which stores the measurements and provides a browser based means of qeurying the data, prodcuing reports, etc (and possibly also allows control of the remote equipment). Can anyone recommend a good book describing an approach to developing such a software architecture, keeping it generic, which tools, languages. test methods, etc to use? (note to self: ask a similar question about possible existing frameworks)

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  • Programming help Loop adding

    - by Deonna
    I know this probably really simple but Im not sure what im doing wrong... The assignment states: For the second program for this lab, you are to have the user enter an integer value in the range of 10 to 50. You are to verify that the user enters a value in that range, and continue to prompt him until he does give you a value in that range. After the user has successfully entered a value in that range, you are to display the sum of all the integers from 1 to the value entered. I have this so far: #include <iostream.h> int main () { int num, sum; cout << "do-while Loop Example 2" << endl << endl; do { cout << "Enter a value from 10 to 50: "; cin >> num; if (num < 10 || num > 50) cout << "Out of range; Please try again..." << endl; } while (num < 10 || num > 50); { int i; int sum = 0; for (num = 1; num <= 50; num ++) sum = sum + num; } cout << endl << "The sum is " << sum << endl; return 0; } Im just not sure exactly what i'm doing wrong... I keep getting the wrong sum for the total...

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  • linux raw socket programming question

    - by user194420
    Hi all, I am trying to create a raw socket which send and receive message with ip/tcp header under linux. I can successfully binds to a port and receive tcp message(ie:syn) However, the message seems to be handled by the os, but not mine. I am just a reader of it(like wireshark). My raw socket binds to port 8888, and then i try to telnet to that port . In wireshark, it shows that the port 8888 reply a "rst ack" when it receive the "syn" request. In my program, it shows that it receive a new message and it doesnot reply with any message. Any way to actually binds to that port?(prevent os handle it) Here is part of my code, i try to cut those error checking for easy reading sockfd = socket(AF_INET, SOCK_RAW, IPPROTO_TCP); int tmp = 1; const int *val = &tmp; setsockopt (sockfd, IPPROTO_IP, IP_HDRINCL, val, sizeof (tmp)); servaddr.sin_family = AF_INET; servaddr.sin_addr.s_addr = htonl(INADDR_ANY); servaddr.sin_port = htons(8888); bind(sockfd, (struct sockaddr*)&servaddr, sizeof(servaddr)); //call recv in loop

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  • What router settings to use for wireless home network

    - by Question Overflow
    While looking at the setting of my wireless router, I am bewildered by the array of options available. Despite searching on Wikipedia to try to understand the various acronyms, I am still clueless to decide what is the best setting to use although the default works fine. Rather than calling the internet service provider (ISP) to ask them the correct settings, I hope to learn more about the differences between some of the options listed below, so that I would be able to make a more informed decision from now onwards: PPPoE vs PPPoA LLC vs VC-Mux Bridge vs Routed In addition, I would also like to know the significance of the following MTU VPI VCI And whether or when I should manually specify DNS?

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  • Keeping sync in multiplayer RTS game that uses floating point arithmetic

    - by Calmarius
    I'm writing a 2D space RTS game in C#. Single player works. Now I want to add some multiplayer functionality. I googled for it and it seems there is only one way to have thousands of units continuously moving without a powerful net connection: send only the commands through the network while running the same simulation at every player. And now there is a problem the entire engine uses doubles everywhere. And floating point calculations are depends heavily on compiler optimalizations and cpu architecture so it is very hard to keep things syncronized. And it is not grid based at all, and have a simple phisics engine to move the space-ships (space ships have impulse and angular-momentum...). So recoding the entire stuff to use fixed point would be quite cumbersome (but probably the only solution). So I have 2 options so far: Say bye to the current code and restart from scratch using integers Make the game LAN only where there is enough bandwidth to have 8 players with thousands of units and sending the positions and orientation etc in (almost) every frame... So I looking for better opinions, (or even tips on migrating the code to fixed-point without messing everything up...)

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  • Mac OSX Programming for long time Linux geek

    - by DarenW
    I've written software on Linux since 1995 but must get up to speed with app development on the Mac. I have no experience on that platform. Obviously I should get my hands on some appropriate hardware. What are good books, tutorial websites, and other resources for experienced devs getting started on Mac? Not just APIs and app internals, but also including how does one install an app, debug it, etc?

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  • Best network tuning variables for a Linux proxy

    - by smarthall
    What are the best settings to tune so that Linux can handle a very large amount of TCP connections such as would be seen by a proxy server or a webserver? I'm using Centos6 and squid and am seeing a large amount of TIME_WAIT connections backing up until finally the machine stops responding. The machine isn't loaded at the time, and is having trouble making ingoing and outgoing connections. I've had several suggestions of tuning /proc/sys/net/ipv4/tcp_tw_reuse and /proc/sys/net/ipv4/tcp_tw_reuse but they mention bad interactions with load balancers and NAT both of which are used in my situation.

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  • Enter network credentials as part of batch script

    - by Michael
    WinXP: I have several system services that are needed to run some machinery in my lab. The machine these services are running uses a lab login that has administrator rights. Our IS department, unfortunately, has it set up where at some point during the night the login "loses" the privilege level to start/stop these services. The account stays logged in, but the software controlling my hardware becomes unresponsive. In order to get things back up and running, I have to stop the system services and restart them. Because of the security settings, however, I have to re-enter the user password to start the service (even though the user was never logged out). That, I get the "This service cannot be started due to a logon failure" and I have to enter the password. What would be ideal is to have a batch script run before anyone gets into work that stops all of the necessary services, enters the user credentials when prompted, and then restarts them so that everything is ready for first shift to run. I assumed that using the Task Scheduler in Windows would work as it allows you to run batch files with a user's name and password, but this didn't seem to do the trick. With this setup I would arrive to find that all the services are stopped but not started again. (Presumably because the authentication failed.) The batch file is about as simple as it gets, all I have is: net stop "Service1" net stop "Serivce2" etc., then restart in reverse order based on dependency: net start "Service2" net start "Serivce1" What would it take to accomplish what I'm trying to do and restart the services?

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  • How do I REALLY get started programming in Ruby on Rails

    - by Nate
    I can't figure out where exactly to go in order to write the Ruby code itself. I know that I can enter things line-by-line in Terminal (I'm on a Mac), but I'd like to figure out how to start using something like Xdrive (Apple won't allow me to download Xrive because I have OS X 10.5, not 10.6). What steps do I need to take in order to start writing code in a program like xDrive. Thank you in advance.

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  • C socket programming: client send() but server select() doesn't see it

    - by Fantastic Fourier
    Hey all, I have a server and a client running on two different machines where the client send()s but the server doesn't seem to receive the message. The server employs select() to monitor sockets for any incoming connections/messages. I can see that when the server accepts a new connection, it updates the fd_set array but always returns 0 despite the client send() messages. The connection is TCP and the machines are separated by like one router so dropping packets are highly unlikely. I have a feeling that it's not select() but perhaps send()/sendto() from client that may be the problem but I'm not sure how to go about localizing the problem area. while(1) { readset = info->read_set; ready = select(info->max_fd+1, &readset, NULL, NULL, &timeout); } above is the server side code where the server has a thread that runs select() indefinitely. rv = connect(sockfd, (struct sockaddr *) &server_address, sizeof(server_address)); printf("rv = %i\n", rv); if (rv < 0) { printf("MAIN: ERROR connect() %i: %s\n", errno, strerror(errno)); exit(1); } else printf("connected\n"); sleep(3); char * somemsg = "is this working yet?\0"; rv = send(sockfd, somemsg, sizeof(somemsg), NULL); if (rv < 0) printf("MAIN: ERROR send() %i: %s\n", errno, strerror(errno)); printf("MAIN: rv is %i\n", rv); rv = sendto(sockfd, somemsg, sizeof(somemsg), NULL, &server_address, sizeof(server_address)); if (rv < 0) printf("MAIN: ERROR sendto() %i: %s\n", errno, strerror(errno)); printf("MAIN: rv is %i\n", rv); and this is the client side where it connects and sends messages and returns connected MAIN: rv is 4 MAIN: rv is 4 any comments or insightful insights are appreciated.

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  • iPhone basic sheet programming?

    - by ryyst
    Hi, I want to program an "Add"-Window to my application, much like the "Add Contact"-window in the Contacts app or the "Add City"-window in the Weather app. My question is: how do I code the effect of sliding up that Contacts & Weather feature? -- Ry

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  • Java Programming Homework

    - by user1427476
    Write a program to read in a file containing the names of the employ of a company and store them in an array of Strings named Employ []. Read another file containing the Salaries of each employ written in the same order and store them in another array of integers named salary[] (contents of both files are shown below). Finally create a file stating for example. Mr. XYZ receive $75,500.00 per year (Note that salary is stored as integer but displayed here as double with a comma separating thousands. This formatting needs to be done using DecimalFormat Class)

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  • SQL Server 2005 - Enabling both Named Pipes & TCP/IP protocols?

    - by Clinemi
    We have a SQL Server 2005 database, and currently all our users are connecting to the database via the TCP/IP protocol. The SQL Server Configuration Manager allows you to "enable" both Named Pipes, and TCP/IP connections at the same time. Is this a good idea? My question is not whether we should use named pipes instead of TCP/IP, but are there problems associated with enabling both? One of our client's IT guys, says that enabling database communication with both protocols will limit the bandwidth that either protocol can use - to like 50% of the total. I would think that the bandwidth that TCP/IP could use would be directly tied (inversely) to the amount of traffic that Named Pipes (or any of the other types of traffic) were occupying on the network at that moment. However, this IT person is indicating that the fact that we have enabled two protocols on the server, artificially limits the bandwidth that TCP/IP can use. Is this correct? I did Google searches but could not come up with an answer to this question. Any help would be appreciated.

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  • Java programming requirements

    - by hosseinsinohe
    Hi All, I am a C# programmer. I want to learn Java to implement my windows application. But I don't know what IDE and what tools can help me. Please help me to choose best platform and IDE and other tools. Edit: Thank You For Your Helping. And What is Best Ebooks and UserGuids to Learn java.

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  • How two use 2 subnets on one network

    - by BGuy2010
    I have some servers at a colocation. They've given us an IP range,subnet,and gateway. Now we have run out of IP's and they've given us a new range of IP's but with a different subnet and gateway. We have a Juniper NetScreen firewall and a load balancer, and I am not sure how to proceed in order to be able to use these new IPS that are on a different subnet. Do I need to setup a new VLAN? on our firewall? I tried adding one of the new IP's on one of our servers, with the new subnet and gateway. I could ping the alternate gateway, but could not ping the assigned IP from outside or from inside.

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  • Dual SMTP Server issue with Unicast Network Load Balancing

    - by Igor K
    Using two servers with NLB, each box contains IIS and a mail server. Server1 is the primary Server2 runs the backup mail server The problem is the web app sends email to ourselves. When mail is sent from Server2 (via its own SMTP server) to ourselves, it tries to contact Server1, as its the mail server IP. But under Unicast mode of NLB, it cant reach the host via the public dedicated IP address. How can we get round this?

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  • setting up a private network using linksys router

    - by user287745
    scenerio:- a database server running sql server 2005 and sql server management studio 2005 express editions a web server running IIS 5.0v using windows xp pro. two other computer having windows xp and windows 98 i have a linksys router which i use to access point for wireless (laptop) there are 5 sockets behind it four for clients and one for internet. i would like to setup a LAN- something like a private hosting area with two clients. would should i do? where to connect what and what would the changes in settnigs be. right now it uses dhcp or something to assign ips. where will the webserver be attached to the internet socket? where will the db server be attached? any guide, links, help thank you

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  • Object Oriented Programming Problem

    - by Danny Love
    I'm designing a little CMS using PHP whilst putting OOP into practice. I've hit a problem though. I have a page class, whos constructor accepts a UID and a slug. This is then used to set the properties (unless the page don't exist in which case it would fail). Anyway, I wanted to implement a function to create a page, and I thought ... what's the best way to do this without overloading the constructor. What would the correct way, or more conventional method, of doing this be? My code is below: <?php class Page { private $dbc; private $title; private $description; private $image; private $tags; private $owner; private $timestamp; private $views; public function __construct($uid, $slug) { } public function getTitle() { return $this->title; } public function getDescription() { if($this->description != NULL) { return $this->description; } else { return false; } } public function getImage() { if($this->image != NULL) { return $this->image; } else { return false; } } public function getTags() { if($this->tags != NULL) { return $this->tags; } else { return false; } } public function getOwner() { return $this->owner; } public function getTimestamp() { return $this->timestamp; } public function getViews() { return $this->views; } public function createPage() { // Stuck? } }

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  • How to elegantly selectively exclude FreeBSD network traffic from OpenVPN interface by port

    - by Polygonica
    inexperienced sysadmin here. I'm planning on running a net daemon inside a FreeBSD jail through OpenVPN, but want to be able to SSH directly into the jail and use the daemon's web interface daemon without going through the VPN. As I understand it, an OpenVPN tunnel is normally set up as a default virtual internet interface, and so incoming traffic will go out on the OpenVPN interface by default (which is problematic, as this incurs latency). I thought "well, obviously, since all of this traffic is leaving on a handful of ports, I'll just redirect those to the non-VPN gateway." I've tried to look for solutions, but almost all of them involve iptables instead of ipfw (which is default for FreeBSD) and solve slightly different problems. And alternate solutions like using multiple default routes to ensure that incoming traffic on any interface is always sent out on the same interface seem far-reaching and require deep knowledge of all tools involved. Is there an elegant way of ensuring that traffic leaving on specific ports exits on a specified non-default interface using ipfw?

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