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  • Hyper-V 2008 R2 synthetic networking stops working with linux 2.6.32.15

    - by luxifer
    Hi there, so I thought I'd give Hyper-V on Windows Server 2008 R2 Enterprise a try on my Homeserver (yes, it's legit... got it from msdnaa). First thing to throw at it was my firewall which runs IPFire. This distribution currently uses the kernel version 2.6.32.15 and comes with the Hyper-V drivers. So I enabled them and at first they work just fine but after a few minutes they just fail. There are no packages going in or out anymore until I reboot the VM but sometimes even that won't work so the VM just keeps "Stopping" like forever. Emulated networking works fine but it slow and uses more CPU. That way my firewall routes slower than when running under virtualbox on an atom N270. My server has an E6750; VM is limited to 25%, but that should still outperform this atom CPU especially since it's never going anywhere near 100% CPU load, so give me a break! A quick google search led me to people having the same problem (even with other distributions and kernel versions that include those drivers) but no solution yet... I already found this but I can't quite follow the author on the part where he solved the issue - especially since I need two virtual nics for my firewall distro to work (obviously one internal and one external) What am I missing here?

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  • Centos 6.2 Fresh 'Basic Server' install networking issues

    - by RWC
    I've had a /29 provisioned on a network port for a server and am trying to at least configure the machine so I can ssh into it. It's Centos 6.2 x64 with the Basic Server install. Currently not able to ping gateway or any address for that matter. For reference: Default Interface: em2 Network ID: 66.*.*.0/29 Gateway: 66.*.*.1 Broadcast: 66.*.*.7 Please see my following configs: /etc/sysconfig/network-scripts/ifcfg-em2 DEVICE=em2 NM_CONTROLLED=yes ONBOOT=yes HWADDR=Not Important TYPE=Ethernet BOOTPROTO=none IPADDR=66.*.*.2 PREFIX=29 DNS1=8.8.8.8 DNS2=8.8.4.4 DEFROUTE=yes IPV4_FAILURE_FATAL=yes IPV6INIT=no NAME="System em2" NETMASK=255.255.255.248 USERCTL=no $: route -n Destination // Gateway // Genmask // Flags // Metric // Ref // Use // Iface 66.*.*.0 0.0.0.0 255.255.255.248 U 0 0 0 em2 169.254.0.0 0.0.0.0 255.255.0.0 U 0 1003 0 em2 0.0.0.0 66.*.*.1 0.0.0.0 UG 0 0 0 em2 $: route Destination // Gateway // Genmask // Flags // Metric // Ref // Use // Iface 66.*.*.0 * 255.255.255.248 U 0 0 0 em2 link-local * 255.255.0.0 U 0 1003 0 em2 default 66.*.*.1 0.0.0.0 UG 0 0 0 em2 $: cat /etc/sysconfig/network NETWORKING=yes HOSTNAME=excalibur.domain.com GATEWAY=66.*.*.1 Keep in mind that I cannot even currently ping the gateway which is quite confusing for me. My /etc/hosts are configured correctly with the *.2 address. I'm not concerned with getting all of the addresses on the /29 up and running yet, just one so I can at least ssh in. Thanks! Edit: Adding in ifconfig. $: ifconfig em2 Link encap:Ethernet HWaddr XX:XX:XX:XX:XX:XX inet addr:66.*.*.2 Bcat:66.*.*.7 Mask:255.255.255.248 inet6 addr: UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:5536 errors:0 dropped:0 overruns:0 frame:0 TX packets:10 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:2599469 (2.4 MiB) TX bytes: 748 (748.0 b) Interrupt:48 Memory:dc000000-dc012800 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:34 errors:0 etc etc

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  • Networking - intermittent, slow speeds

    - by jack
    Hi all I'm a novice when it comes to networking. I live in a large two storey building that used to be a school and we have an internet connection with BT (british telecoms provider), the connection speed is 12Mb.. Basically our connection is slow and very intermittent and I was wondering if anybody here could provide some help or ideas. There are about 11 people in the building who could be online at any time. We have a router on the ground floor which is bog standard supplied by BT. To provide Broadband access to the 1st and 2nd floors, we used an old switch that the school left, we have a cable running from the router on the first floor to the switch which connects to a wireless router which is configured as a bridge on the 2nd floor supplying broadband access to the 1st and 2nd floors. Additionally we have 3 computers that are connected via the switch through the ethernet sockets left by the school on the ground floor. The router we use on the 2nd floor came in a pack of 2 and cost about £15 (bought by another person). Sometimes the connection is perfectly fine, i.e. early hours of the morning or when everybody is out, we have rang BT who say that the connection cannot cope with the numbers of people online, plus I'm not sure whether each person is streaming etc. Can anybody offer any advice?

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  • CentOS networking BNX2

    - by james moore
    Having some trouble with my NICs. The server starts fine and I can wget/ping etc. However, when I /etc/init.d/networking restart I then receive the following error: Bringing up interface eth0: bnx2: fw sync timeout, reset code = 1030009 SIOCSIFFLAGS: Device or resource busy Consequently, the task fails. I have searched around on google users suggesting to disable PNP in the BIOS but I see no option. Here is some system information: $ ethtool -i eth0 driver: bnx2 version: 2.0.8-rh firmware-version: bc 2.9.1 $ uname -a Linux host 2.6.18-238.9.1.el5 #1 SMP Tue Apr 12 18:10:13 EDT 2011 x86_64 x86_64 x86_64 GNU/Linux $/sbin/lspci | grep Broadcom 04:00.0 PCI brodge: Broadcom EPB PCI-Express to PCI-X Bridge (rev c3) 05:00.0 Ethernet controller: Broadcom Corporation NetXtreme II BCM5700 Gigabit Ethernet (rev 12) 08:00.0 PCI brodge: Broadcom EPB PCI-Express to PCI-X Bridge (rev c3) 09:00.0 Ethernet controller: Broadcom Corporation NetXtreme II BCM5700 Gigabit Ethernet (rev 12) $ lsmod | grep bnx2 bnx2i 81704 0 cnic 109512 1 bnx2i libiscsi2 77765 6 be2iscsi,ib_iser,iscsi_tcp,bnx2i,cxgb3i,libiscsi_tcp scsi_transport_iscsi2 73945 8 be2iscsi,ib_iser,iscsi_tcp,bnx2i,cxgb3i,libiscsi2 bnx2 224780 0 scsi_mod 199001 15 mpt2sas,scsi_transport_sas,mptctl,be2iscsi,ib_iser,iscsi_tcp,bnx2i,cxgb3i,libiscsi2,scsi_transport_iscsi2,scsi_dh,sg,libata,megaraid_sas,sd_mod $ rmmod bnx2; modprobe bnx2 PCI: Enabling device 0000:05:00.0 (0158 -> 015a) PCI: Enabling device 0000:09:00.0 (0158 -> 015a) bnx2: fw sync timeout, reset code = 10300003 Any help would be appreciated as I am at a loss.

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  • Inconsistent movement / line-of-sight around obstacles on a hexagonal grid

    - by Darq
    In a roguelike game I've been working on, one of my core design goals has been to allow the player to "Play the game, not the grid." In essence, I want the player's positioning to be tactical because of elements in the game world, not simply because some grid tiles are more advantageous than others, in relation to enemies. I am fine with world geometry not being realistic, but it needs to be consistent. In this process I have ran into most of the common problems (Square tiles? Diagonal movement, LOS, corner cases, etc.) and have moved to a hexagonal tile grid. For the most part this has been great, and I've not had too many inconsistencies. Recently however I have been stumped by the following: Points A and B are both distance 4 from the player (red lines). Line-of-sight to both are blocked by walls (black tiles). However, due to the hexagonal grid, A can be reached in 4 moves, whereas B requires 5 moves (blue lines). On a hex grid, "shortest path" seems divorced from "direct path", there may be multiple shortest paths to any point, but there is only one direct path (or two in some situations). This is fine, geometry need not be realistic. However this also seems inconsistent, similar obstacles are more effective in some positions than in others. A player running away from an enemy should be able to run in any direction, increasing the distance between the two actors. However when placing obstacles or traps between themselves and enemies, the player is best served by running in one of the six directions that don't have multiple shortest paths. Is there a way to rationalise this? Am I missing something that makes this behaviour consistent? Or is there a way to make this behaviour consistent? I am most certainly over-thinking this, but as it is one of my goals, I should do it due diligence.

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  • Add power over Ethernet without new switches?

    - by dannymcc
    I need to power 16 IP phones over their Ethernet connections. I am in the process of changing our switches and only the phones need PoE, everything else is powered by mains cables. I have contacted the supplier of the phones and for 16 mains leads it will be close to £300. I know it's possible to get a PoE injector that goes between the mains and the phone but I would like to do this as tidily as possible and ideally in bulk. I imagine something that looks like a switch but doesn't actually 'switch' if that makes sense. Basically I want to inject power to 16 devices at once.

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  • House Wiring for Ethernet/Coax/Power

    - by Adam Kragt
    Hoping this is the right place to post, the rest didn't seem to fit. If not, I apologize. Remodeling my house and want to wire up each room with Ethernet/coax wall ports. Both Ethernet, coax and power will be running through the sub-floor. I've read that there needs to be 2 ft between power cables and Ethernet to limit/prevent interference. Is this true? If not, does anyone know what the distance is? Thanks!

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  • How do I get long command lines to wrap to the next line?

    - by BrianH
    Edit It was my .bashrc file. I've copied the same profile from machine to machine, and I used special characters in my $PS1 that are somehow throwing it off. I'm now sticking with the standard bash variables for my $PS1. Thanks to @ændrük for the tip on the .bashrc! ...End Edit... Something I have noticed in Ubuntu for a long time that has been frustrating to me is when I am typing a command at the command line that gets longer (wider) than the terminal width, instead of wrapping to a new line, it goes back to column 1 on the same line and starts over-writing the beginning of my command line. (It doesn't actually overwrite the actual command, but visually, it is overwriting the text that was displayed). It's hard to explain without seeing it, but let's say my terminal was 20 characters wide (Mine is more like 120 characters - but for the sake of an example), and I want to echo the English alphabet. What I type is this: echo abcdefghijklmnopqrstuvwxyz But what my terminal looks like before I hit the key is: pqrstuvwxyzghijklmno When I hit enter, it echos abcdefghijklmnopqrstuvwxyz so I know the command was received properly. It just wrapped my typing after the "o" and started over on the same line. What I would expect to happen, if I typed this command in on a terminal that was only 20 characters wide would be this: echo abcdefghijklmno pqrstuvwxyz Background: I am using bash as my shell, and I have this line in my ~/.bashrc: set -o vi to be able to navigate the command line with VI commands. I am currently using Ubuntu 10.10 server, and connecting to the server with Putty. In any other environment I have worked in, if I type a long command line, it will add a new line underneath the line I am working on when my command gets longer than the terminal width and when I keep typing I can see my command on 2 different lines. But for as long as I can remember using Ubuntu, my long commands only occupy 1 line. This also happens when I am going back to previous commands in the history (I hit Esc, then 'K' to go back to previous commands) - when I get to a previous command that was longer than the terminal width, the command line gets mangled and I cannot tell where I am at in the command. The only work-around I have found to see the entire long command is to hit "Esc-V", which opens up the current command in a VI editor. I don't think I have anything odd in my .bashrc file. I commented out the "set -o vi" line, and I still had the problem. I downloaded a fresh copy of Putty and didn't make any changes to the configuration - I just typed in my host name to connect, and I still have the problem, so I don't think it's anything with Putty (unless I need to make some config changes) Has anyone else had this problem, and can anyone think of how to fix it? Thanks in advance! Brian

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  • How do I get long command lines to wrap to the next line?

    - by BrianH
    Edit It was my .bashrc file. I've copied the same profile from machine to machine, and I used special characters in my $PS1 that are somehow throwing it off. I'm now sticking with the standard bash variables for my $PS1. Thanks to @ændrük for the tip on the .bashrc! ...End Edit... Something I have noticed in Ubuntu for a long time that has been frustrating to me is when I am typing a command at the command line that gets longer (wider) than the terminal width, instead of wrapping to a new line, it goes back to column 1 on the same line and starts over-writing the beginning of my command line. (It doesn't actually overwrite the actual command, but visually, it is overwriting the text that was displayed). It's hard to explain without seeing it, but let's say my terminal was 20 characters wide (Mine is more like 120 characters - but for the sake of an example), and I want to echo the English alphabet. What I type is this: echo abcdefghijklmnopqrstuvwxyz But what my terminal looks like before I hit the key is: pqrstuvwxyzghijklmno When I hit enter, it echos abcdefghijklmnopqrstuvwxyz so I know the command was received properly. It just wrapped my typing after the "o" and started over on the same line. What I would expect to happen, if I typed this command in on a terminal that was only 20 characters wide would be this: echo abcdefghijklmno pqrstuvwxyz Background: I am using bash as my shell, and I have this line in my ~/.bashrc: set -o vi to be able to navigate the command line with VI commands. I am currently using Ubuntu 10.10 server, and connecting to the server with Putty. In any other environment I have worked in, if I type a long command line, it will add a new line underneath the line I am working on when my command gets longer than the terminal width and when I keep typing I can see my command on 2 different lines. But for as long as I can remember using Ubuntu, my long commands only occupy 1 line. This also happens when I am going back to previous commands in the history (I hit Esc, then 'K' to go back to previous commands) - when I get to a previous command that was longer than the terminal width, the command line gets mangled and I cannot tell where I am at in the command. The only work-around I have found to see the entire long command is to hit "Esc-V", which opens up the current command in a VI editor. I don't think I have anything odd in my .bashrc file. I commented out the "set -o vi" line, and I still had the problem. I downloaded a fresh copy of Putty and didn't make any changes to the configuration - I just typed in my host name to connect, and I still have the problem, so I don't think it's anything with Putty (unless I need to make some config changes) Has anyone else had this problem, and can anyone think of how to fix it? Thanks in advance! Brian

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  • Problem with wireless networking

    - by Rodnower
    Hello, I have atheros wifi hardware, intell chipset, gigabyte laptop and CentOS 5 installed. Now I try to use wireless network and get problems. First of all I want to say that I have 2 OS on my laptop, and when I load Windows XP I still may to access to the wireless network. First I try to get it on Linux was to make active wlan0 interface in: system - administration - network but I get: Determining IP information for wlan0... failed. Second I try also was unsuccessfully: [root 1 network-scripts]# ifup-wireless Error : unrecognised wireless request "off" This relevant output of iwconfig is: Warning: Driver for device wlan0 recommend version 21 of Wireless Extension, but has been compiled with version 20, therefore some driver features may not be available... wlan0 IEEE 802.11 ESSID:"" Mode:Managed Frequency:2.462 GHz Access Point: Not-Associated Tx-Power=27 dBm Retry min limit:7 RTS thr:off Fragment thr=2352 B Encryption key:off Link Quality:0 Signal level:0 Noise level:0 Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:0 Invalid misc:0 Missed beacon:0 {output not in the original format} The same things are happen even if I do: modprobe wlan0 (this not get error) Important to say that modprobe not succeed to find ath_pci, tharefor I decide to download latest version of the madwifi driver from http://madwifi-project.org. I extracted this, but when I make this, this is what I get: [root 1 madwifi-0.9.4]# make /bin/sh: line 0: cd: /lib/modules/2.6.18-164.el5/build: No such file or directory Makefile.inc:66: * /lib/modules/2.6.18-164.el5/build is missing, please set KERNELPATH. Stop. I tried to set KERNELPATH, but I think that it was incorrect: [root 1 madwifi-0.9.4]# make KERNELPATH=/lib/modules/2.6.18-164.el5/kernel/ /bin/sh: cc: command not found Makefile.inc:81: * Cannot detect kernel version - please check compiler and KERNELPATH. Stop. Some one have any ideas? Thank you very much for ahead.

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  • Tips on setting up a virtual lab for self-learning networking topics

    - by Harry
    I'm trying to self-learn the following topics on Linux (preferably Fedora): Network programming (using sockets API), especially across proxies and firewalls Proxies (of various kinds like transparent, http, socks...), Firewalls (iptables) and 'basic' Linux security SNAT, DNAT Network admininstration power tools: nc, socat (with all its options), ssh, openssl, etc etc. Now, I know that, ideally, it would be best if I had 'enough' number of physical nodes and physical network equipment (routers, switches, etc) for this self-learning exercise. But, obviously, don't have the budget or the physical space, nor want to be wasteful -- especially, when things could perhaps be simulated/emulated in a Linux environment. I have got one personal workstation, which is a single-homed Fedora desktop with 4GB memory, 200+ GB disk, and a 4-core CPU. I may be able to get 3 to 4 additional low-end Fedora workstations. But all of these -- including mine -- will always remain strictly behind our corporate firewall :-( Now, I know I could use VirtualBox-based virtual nodes, but don't know if there are any better alternatives disk- and memory- footprint-wise. Would you be able to give me some tips or suggestions on how to get started setting up this little budget- and space-constrained 'virtual lab' of mine? For example, how would I create virtual routers? Has someone attempted this sort of thing before: namely, creating a virtual network lab behind a corporate firewall for learning/development/testing purposes? I hope my question is not vague or too open-ended. Basically, right now, I don't know how to best leverage the Linux environment and the various 'goodies' it comes with, and buying physical devices only when it is absolutely necessary.

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  • Networking issues with Linux server (CentOS 5.3)

    - by sxanness
    I have a Linux server hosting our bug tracking software (CentOS 5.2 Kernel 2.6.18-128.4.1.el5) that I have having some strange network problems with. The machine is configured with two NICS, one for the public interface and the other for our server back end network. The problem is that after doing a service network restart I can ping the public interface and it sends anywhere from 200-500 ICMP packets and then all of a sudden I start getting a request timed out error. Strange but as soon as I connect to the private interface the ping starts working again to the public interface. I clearly have a routing issue somewhere. I have a Juniper Router with the following configuration. Interface 0/0 -- Connect subnet to the ISP at our co-location Interface 0/2 -- For our DRAC network Interface 0/3 -- The Server-backend network (plugs directly into a switch that feeds to all the NICs that are on the 10.3.20.x network. Interface 0/4 -- Plugs directly into another switch that feeds our public interfaces, that interface as all the gateways from our public ip rangs as secondary IP addresses. I hope that someone can ask the right questions that can lead me to check things and figure out what is going on. Has anyone had similar problems and what kind of things should I be checking? Routing issue or something even more complicated? [root@fogbugz ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0 # Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ DEVICE=eth0 BOOTPROTO=static IPADDR=72.249.134.98 NETMASK=255.255.255.248 BROADCAST=72.249.134.103 HWADDR=00:16:3E:AA:BB:EE ONBOOT=yes [root@fogbugz ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth1 # Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ DEVICE=eth1 BOOTPROTO=static BROADCAST=10.3.20.255 HWADDR=00:17:3E:AA:BB:EE IPADDR=10.3.20.25 NETMASK=255.255.255.0 NETWORK=10.3.20.0 ONBOOT=yes [root@fogbugz ~]# cat /etc/sysconfig/network NETWORKING=yes NETWORKING_IPV6=no HOSTNAME=fogbugz.dfw.hisg-it.net GATEWAY=72.249.134.97 [root@fogbugz ~]# route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 72.249.134.96 0.0.0.0 255.255.255.248 U 0 0 0 eth0 10.3.20.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1 169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth1 10.0.0.0 10.3.20.1 255.0.0.0 UG 0 0 0 eth1 0.0.0.0 72.249.134.97 0.0.0.0 UG 0 0 0 eth0

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  • Networking issues with Linux server (CentOS 5.3)

    - by sxanness
    I have a Linux server hosting our bug tracking software (CentOS 5.2 Kernel 2.6.18-128.4.1.el5) that I have having some strange network problems with. The machine is configured with two NICS, one for the public interface and the other for our server back end network. The problem is that after doing a service network restart I can ping the public interface and it sends anywhere from 200-500 ICMP packets and then all of a sudden I start getting a request timed out error. Strange but as soon as I connect to the private interface the ping starts working again to the public interface. I clearly have a routing issue somewhere. I have a Juniper Router with the following configuration. Interface 0/0 -- Connect subnet to the ISP at our co-location Interface 0/2 -- For our DRAC network Interface 0/3 -- The Server-backend network (plugs directly into a switch that feeds to all the NICs that are on the 10.3.20.x network. Interface 0/4 -- Plugs directly into another switch that feeds our public interfaces, that interface as all the gateways from our public ip rangs as secondary IP addresses. I hope that someone can ask the right questions that can lead me to check things and figure out what is going on. Has anyone had similar problems and what kind of things should I be checking? Routing issue or something even more complicated? [root@fogbugz ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0 # Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ DEVICE=eth0 BOOTPROTO=static IPADDR=72.249.134.98 NETMASK=255.255.255.248 BROADCAST=72.249.134.103 HWADDR=00:16:3E:AA:BB:EE ONBOOT=yes [root@fogbugz ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth1 # Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ DEVICE=eth1 BOOTPROTO=static BROADCAST=10.3.20.255 HWADDR=00:17:3E:AA:BB:EE IPADDR=10.3.20.25 NETMASK=255.255.255.0 NETWORK=10.3.20.0 ONBOOT=yes [root@fogbugz ~]# cat /etc/sysconfig/network NETWORKING=yes NETWORKING_IPV6=no HOSTNAME=fogbugz.dfw.hisg-it.net GATEWAY=72.249.134.97 [root@fogbugz ~]# route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 72.249.134.96 0.0.0.0 255.255.255.248 U 0 0 0 eth0 10.3.20.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1 169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth1 10.0.0.0 10.3.20.1 255.0.0.0 UG 0 0 0 eth1 0.0.0.0 72.249.134.97 0.0.0.0 UG 0 0 0 eth0

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  • Wireless disabled after connecting ethernet cable

    - by user1716672
    Im using Linux Mint 13. Wireless has always worked fine but stopped yesterday after I connected to the internet via an ethernet cable. I ran: sudo rfkill list gives me: 0: phy0: Wireless LAN Soft blocked: yes Hard blocked: no sudo rfkill unblock 0 sudo rfkill list gives me 0: phy0: Wireless LAN Soft blocked: no Hard blocked: no sudo service networking start results in: networking stop/waiting The contents of /etc/network/interfaces is auto lo iface lo inet loopback Any ideas what I can do?

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  • How to detect 2D line on line collision?

    - by Vish
    I'm a flash actionscript game developer who is a bit backward with mathematics, though I find physics both interesting and cool. For reference this is a similar game to the one I'm making: Untangled flash game I have made an untangled game almost to full completion of logic. But, when two lines intersect, I need those intersected or 'tangled' lines to show a different color; red. It would be really kind of you people if you could suggest an algorithm with/without math for detecting line segment collisions. I'm basically a person who likes to think 'visually' than 'arithmetically' :) P.S I'm trying to make a function as private function isIntersecting(A:Point, B:Point, C:Point, D:Point):Boolean Thanks in advance.

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  • Detect line line collision in an Untangled game

    - by Vish
    Pardon me if this is a repeat question,but I've been searching google for vain since the past few days, I'm a flash actionscript game developer who is a bit backward with mathematics, though I find physics both interesting and cool. Similiar game : Untangled flash game I have made an untangled game almost to full completion of logic. But, when two lines intersect , I need those intersected or 'tangled' lines to show a different color; red. It would be really kind of you people if you could suggest an algorithm with / without math for detecting line segment collisions. I'm basically a person who likes to think 'visually' than 'arithmetically' :) P.S I'm trying to make a function as private function isIntersecting(A:Point, B:Point, C:Point, D:Point):Boolean Thanks in advance. Vishnu Ajit

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  • What resources do you recommend for learning more about TCP/IP, networking, and related areas?

    - by mkelley33
    As a relatively-new Python programmer, I'm finding more and more that networking as it relates to the web and web development is becoming increasingly important to understand. When I was an active C# ASP.NET programmer making smaller websites with less responsibility this knowledge seemed less important, since there was often a "networking" guy performing any tasks beyond acquiring a domain name for a client. Which books, websites, presentations, articles, or other resources would you recommend so that I best understand what's happening between the time a user types a URL and receives the rendered HTML? Thanks!

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  • Power states in Windows

    - by Kurt
    Does anybody know or have a link to documentation on how the Power Manager of Windows, determines to go to the ACPI power states S1-S4? Are there any settings that can be configured? I know that by default states S1-S3 are disabled in Vista and later (they can be enabled by a group policy). Can Windows cycle through these states while for instance an application is actively running?

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  • Intel atom and overall power consumption

    - by amorfis
    I am considering buying of Intel Atom machine. Power consumption is one of my concerns (it is for small server). I know CPU itself consumes a little power, but I heard that chipset consumes much more. Anybody knows how much can such machine consume? I am considering Intel MoBo BLKD945GCLF (chipset: Intel® 945GC Express Chipset with ICH7)

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  • External hard drive that gets its power supply from the PC.

    - by AngryHacker
    I need an external drive to connect to my MacMini. I've been using an 80gb 2.5 drive in an enclosure and it's fine, but now I need a 1.5TB drive. Unfortunately all the 1.5TB drives I found need a separate power supply. I'd like it to be able to feed its power off the USB drive (just like my 80gb drive does). Does something like that exists?

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  • Power and Cooling Cost compared with Server/Hardware Cost

    - by psaccounts
    Has anyone done, or is aware of any, calculations to compare the cost of power and cooling compared to the cost of hardware (servers) in a typical data center? This is to compute a true total cost of ownership of self-hosting servers. Of course real TCO includes: hardware_cost + power + cooling + rental + human_cost + maintenance Is there any study that says something like (TCO - hardware_cost) = 40% of hardware_cost in 3 years? Any pointers will be appreciated.

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  • Cannot find Power Management Tab in XP

    - by Andrew Heath
    I have the problem that when I send my computer to sleep it wakes if you bump the table, floor, burp etc. I have read many threads that say go to Device Manager Mouse Properties Power Management Tab and uncheck the box for wake. My problem is I do not have a Power Management Tab! Anyone know how to enable the tab or stop the mouse from waking my machine? And no, turning it upside down doesn't work either!

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  • No power to HP pavilion dv 1000

    - by Imajica666
    I am working on a friends laptop. I get no power indicator light while plugged in to ac outlet. Will not power on with just the battery. Might this be a case of replacing the system board? I have never broken open a laptop so I am not sure what the best path to take might be. Thanks for any opinions.

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