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  • Best way to segment traffic, Vlan or subnet

    - by thebird
    We have a medium sized network of around 200 nodes and are currently in the process of replacing old daisy chained switches with stack-able or chassis style switches. Right now our network is broken up via subnet; production, management, IP, etc each on a separate subnet. Does anyone have an opinion on whether creating Vlan's instead of subnets would be more beneficial? Our general goal is to prevent bottlenecks, separate traffic for security, and to manage traffic with more ease.

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  • Computer name not appearing on network

    - by stib
    I can connect to other computers on my home network (ubuntu + OSX machines) using the IP address, but I can't connect using the netbios name. On the mac the name appears in Finder but if I try to connect (goconnect to server smb://[email protected]) it doesn't work, while smb://[email protected] does. Same with ssh, ping and afp between the macs. This is a intermittent problem. It has worked in the past.

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  • Build a server in KVM linux

    - by Lai Yu-Hsuan
    I owned a linux server. Now there are several users want to build web services on it, but they require different enviroments. For convenience I give a KVM virtual machine root permission to each user. But obviously the linux server has only one IP. How can I deliver the external requests to corresponding virtual machine? (I expect it's somewhat complicated. If so I want at least some docs/websites I can start reading.)

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  • Startup Folder, HKCU/.../Run, HKLM/.../Run. Where Else to Look to Track Down a Mysterious Login Even

    - by Bob Kaufman
    Starting around the time I installed the Office 2010 Beta, Whenever I login, Windows tries to open a file named "Bob", coincidentally the first part of my username. Selecting Notepad to open it, and it contains TCP/IP network settings. I've looked for and deleted unrecognized entries in my StartUp folder, in HKLM/.../CurrentVersion/Run and in HKCU/.../CurrentVersion/Run with no luck. Is there any other place I should be looking for errant entries?

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  • postgresql login from remote

    - by Hellnar
    I want to give remote access to my postresql db (8.2) to computers that are at the same lan, at the default config I have added this line to pg_hba.conf where xxx.xx.xx.xx is the ip of the machine that hosts postgresql. This machine is a windows 2k server. # IPv4 local connections: host all all 0.0.0.0/0 password host all all xxx.xx.xx.xx/24 password There no firewall or such blocking the connection between and `listen_addresses = '*' for postgresql.conf .

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  • How to charge an iPhone on a Windows PC without Installaing iTunes

    - by Martin Hollingsworth
    I want to be able to charge my iPhone on my work computer, which is running Windows Server 2008 SP1 64-Bit. When I plug the iPhone in with the USB cable, it will not charge. Windows attempts to locate a driver for the device but only comes up with a generic Camera device and even if I allow that to be installed, the iPhone still does not charge. I have checked the computer's BIOS settings and did not find anything relating to power on the USB devices. I also tried this on ports at the back of the computer in addition to those on the front. The PC is a Dell Optiplex 780. As far as I can tell USB devices do not charge unless Windows has installed an appropriate driver. Since it is a work computer I do not want to install iTunes which does include a driver. I have a workaround that I will post as an answer for reference.

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  • how to create a home server ?

    - by Eva
    i download appserv and install on my computer and set the default ip in my Default Gateway but when other people want to connect to my home server , they get the error of time out ! what am i going to do ? my server address : http://192.168.210.230/ and my firewall is now off ! also my antivirus pls help me . Thanks in advance

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  • how to create a home server ?

    - by Eva
    i download appserv and install on my computer and set the default ip in my Default Gateway but when other people want to connect to my home server , they get the error of time out ! what am i going to do ? my server address : http://192.168.210.230/ and my firewall is now off ! also my antivirus pls help me . Thanks in advance

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  • SNMP Traps: Telling the difference between sources

    - by MHibbin
    I am logging all incoming SNMP traps to file, for further processing, via: snmptrapd -Lf /path/to/my/file.log So this will log all traps coming in on port 162. Is there a way I can tell the differences between different sources, i.e vendors. I believe this would be the "OID" field but i'm unsure. Any thoughts would be welcomed, if not I will just have to use a lookup with IP addresses, but I'm sure I saw that there is a unique part to each vendor. Cheers

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  • Automator script to do a whois lookup

    - by Snow Crash
    I'd like to take an IP address from my Terminal, right click, select Services Whois and get the results back somehow. This doesn't exist so I'm wanting to create a simple Automator script to do that. But, I'm running into a few problems. This is what I've done - Automator Actions: Get Specified Text xxx.xxx.xxx.xxx Run Shell Script for x in "$@"; do whois $x; done View Results But all I get in View Results is this: ( "" ) Any suggestions?

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  • How to use aliases for remote hosts when accessing locally

    - by alexloh
    I would like to use an alias for a remote host. For example, when instead of "ping giraffe.foo.bar.com" I want to do "ping giraffe", but only when I do it from my own machine. I am able to do this for raw IP addresses by adding an entry in /etc/hosts (ie "123.456.1.0 giraffe"), but it does not seem to work for host names.

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  • Home movie video browser

    - by Jim Hunziker
    I have a bunch of home movies that don't have useful filenames because they came straight off the camera. (I'm using Vista 64, by the way.) Picasa is pretty good for browsing through them and watching them, but it doesn't use my video card for rendering the videos. My CPU gets pegged at max usage, and full screen barely works. Windows Media Player or Quicktime works fine. Is there another application (like Picasa) that can be used for browsing through movies that both uses my video card and shows thumbnails of all the movies in my collection? I'd rather have something nicer than Windows Explorer. (The movies are h.264 AAC 1280x720.)

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  • Attack from anonymous proxy

    - by mmgn
    We got attacked by some very-bored teenagers registering in our forums and posting very explicit material using anonymous proxy websites, like http://proxify.com/ Is there a way to check the registration IP against a black list database? Has anyone experienced this and had success?

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  • arp "who-has tell" on cloned machine

    - by mcmorry
    I have a urgent problem to solve today, but I'm lost. Please help. I've cloned a Virtual Machine hosted on VM Ware ESXi 4.1 The OS is now Ubuntu Server 12.04 LTS, but at the time of cloning it was 10.04 LTS. I fixed the MAC address manually inside /etc/udev/rules.d/70-persistent-net.rules. It is a known problem on Ubuntu. I had to remove the old MAC address and set the new one as eth0. Everything seems to work fine, except ARP. My provider OVH sent me a warning to resolve it today (this is the second day) or they will block my IP! The log contains many lines like this: Tue Jun 5 01:04:29 2012 : arp who-has 178.32.136.212 tell 178.32.136.224 where .224 is the cloned server that is causing problems, and .212 is the cloned one. arp -na returns: ? (178.33.230.254) at 00:07:b4:00:00:02 [ether] on eth0 ? (178.32.136.212) at 00:50:56:09:8e:f1 [ether] on eth0 The first IP is the ESXi machine. The second one should not be there. I'm not an expert and I don't know what else to do to fix this problem. Any help will be very appreciated. Thanks. EDIT: ifcofig on .224: eth0 Link encap:Ethernet HWaddr 00:50:56:01:32:c6 inet addr:178.32.136.224 Bcast:178.32.136.255 Mask:255.255.255.0 inet6 addr: fe80::250:56ff:fe01:32c6/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:399924 errors:0 dropped:465 overruns:0 frame:0 TX packets:241884 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:58006071 (58.0 MB) TX bytes:663603166 (663.6 MB) 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:516216 errors:0 dropped:0 overruns:0 frame:0 TX packets:516216 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:236284275 (236.2 MB) TX bytes:236284275 (236.2 MB) ifconfig on .212: eth0 Link encap:Ethernet HWaddr 00:50:56:09:8e:f1 inet addr:178.32.136.212 Bcast:178.32.136.255 Mask:255.255.255.0 inet6 addr: fe80::250:56ff:fe09:8ef1/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:16014 errors:0 dropped:0 overruns:0 frame:0 TX packets:14511 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:15134444 (15.1 MB) TX bytes:2683025 (2.6 MB) 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:9944 errors:0 dropped:0 overruns:0 frame:0 TX packets:9944 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:1139347 (1.1 MB) TX bytes:1139347 (1.1 MB)

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  • How would you change a home wireless router with a self-signed admin site certificate to be more secure?

    - by jldugger
    littleblackbox is publishing "private keys" that are accessible on publicly available firmwares. Debian calls these "snake-oil" certs. Most of these routers are securing their HTTPS certs with these, and as I think about it, I've never seen one of these internal admin websites with certs that wasn't self signed. Given a webserver on IP 192.168.1.1, how do you secure it to the point that Firefox doesn't offer warnings (and is still secured)?

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  • Strange GET requests in logs

    - by alfred
    I'm getting the following GET requests in my apache logs: 109.230.251.14 - - [29/Mar/2011:16:28:18 +0100] "GET http://209.191.92.114/config/pwtoken_get?login=jackmcphee232&src=ygodgw&passwd=e59e2240415e6f1aba3da72b8f189f4e&challenge=9TbU_9yfZhKmzlHtK9X4OkQlesTH&md5=1 HTTP/1.0" 404 1226 "-" "-" Any idea what it could be and how is that possibly a get request? That IP address seems to point to Yahoo! I'm very confused.

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  • Repeated requests on our server?

    - by pitty.platsch
    I encountered something strange in the access log of our Apache server which I cannot explain. Requests for webpages that I or my colleagues do from the office's Windows network get repeated by another IP (that we don't know) a couple of seconds later. The user agent repeating our requests is Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; InfoPath.2) Has anyone an idea? Update: I've got some more information now. The referrer of the replicate is set to the URL I requested before and it's not the exact same request as the protocol version is changed from 'HTTP/1.1' to 'HTTP/1.0'. The IP is not just one, it's just one of a subnet (80.40.134.*). It's just the first request to a resource that's get repeated, so it seems the "spy" is building up some kind of cache of visited places. The repeater is also picky. I tried randomly URLs with different HTTP status codes and different file patterns. 301s and 200s are redone, 404s not. Image extensions seem to be ignored. While doing my tests I discovered that this behavior seems to be common as I found other clients visiting just after the first requests: 66.249.73.184 - - [25/Oct/2012:10:51:33 +0100] "GET /foobar/ HTTP/1.1" 200 10952 "-" "Mediapartners-Google" 50.17.125.180 - - [25/Oct/2012:10:51:33 +0100] "GET /foobar/ HTTP/1.1" 200 41312 "-" "Mozilla/5.0 (compatible; proximic; +http://www.proximic.com/info/spider.php)" I wasn't aware about this practice, so I don't see it that much as a threat anymore. I still want to find out who this is, so any further help is appreciated. I'll try later if this also happens if I query some other server where I have access to the access logs and will update here then.

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  • Enterprise IPv6 Migration - End of proxypac ? Start of Point-to-Point ? +10K users

    - by Yohann
    Let's start with a diagram : We can see a "typical" IPv4 company network with : An Internet acces through a proxy An "Others companys" access through an dedicated proxy A direct access to local resources All computers have a proxy.pac file that indicates which proxy to use or whether to connect directly. Computers have access to just a local DNS (no name resolution for google.com for example.) By the way ... The company does not respect the RFC1918 internally and uses public addresses! (historical reason). The use of internet proxy explicitly makes it possible to not to have problem. What if we would migrate to IPv6? Step 1 : IPv6 internet access Internet access in IPv6 is easy. Indeed, just connect the proxy in Internet IPv4 and IPv6. There is nothing to do in internal network : Step 2 : IPv6 AND IPv4 in internal network And why not full IPv6 network directly? Because there is always the old servers that are not compatible IPv6 .. Option 1 : Same architecture as in IPv4 with a proxy pac This is probably the easiest solution. But is this the best? I think the transition to IPv6 is an opportunity not to bother with this proxy pac! Option 2 : New architecture with transparent proxy, whithout proxypac, recursive DNS Oh yes! In this new architecture, we have: Explicit Internet Proxy becomes a Transparent Internet Proxy Local DNS becomes a Normal Recursive DNS + authorative for local domains No proxypac Explicit Company Proxy becomes a Transparent Company Proxy Routing Internal Routers reditect IP of appx.ext.example.com to Company Proxy. The default gateway is the Transparent Internet proxy. Questions What do you think of this architecture IPv6? This architecture will reveal the IP addresses of our internal network but it is protected by firewalls. Is this a real big problem? Should we keep the explicit use of a proxy? -How would you make for this migration scenario? -And you, how do you do in your company? Thanks! Feel free to edit my post to make it better.

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  • Write, wall, who and mesg

    - by miniBill
    I want to set up a server with a lot of users so that (in order of importance): Users cannot obtain ip addresses of other users with who, or last Users cannot wall Users can write to each other Users are able to selectively mesg n other users, as opposed to simply blocking everyone Point 1 is easily solved by a 660 on wtmp and utmp, but I don't know how to achieve the other points The server runs Gentoo Linux

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  • Setting up Virtual Hosts with Apache on Windows 2008 server for multiple sites. Complicated setup, including subversion

    - by Roeland
    I am setting up apache on my windows 2008 server at my home. It will serve 2 functions. Subversion hosting to allow me and some others to manage company documents with version control Local website hosting for web development. Will need to run several websites since I generally work on more then one site at a time. Heres what I have done so far. I set up subversion and apache 2.2 using some walk troughs. I changed the default port to 1337. (im a nerd) Using dyndns.com I created a domain to forward to my home ip which is dynamic. ( company.gotdns.org) I then went into my DNS for my company.com and added a record to point repo.company.com to company.gotdns.org At this point people who need access to my file repository can access by going to repo.company.com/repo which is good so far. My question comes on the next step, setting up virtual hosts with apache. Ideally I would like to have my local website be viewable by some others in the company from their homes. So, say I am working on site1, I would like to have them be able to view this by going site1.roeland.bythepixel.com. At the same time, I would like to have site10.wouter.bythepixel.com go to his local setup for site10. What I have done for this: I went into my DNS for company.com and added a record to point roeland.company.com to company.gotdns.org (which translates to my ip). I added code to my httpd-vhosts.conf (listed at bottom) I added code to my host file (listed at bottom) Hah, so of course this doenst work as excepted.. going to site1.roeland.bythepixel.com doesnt bring up my test1 site. Could anyone point me where I may be going wrong? Thanks! hosts: 127.0.0.1 localhost 127.0.0.1 sensenich.roeland.bythepixel.com ::1 localhost httpd-vhosts.conf: <VirtualHost *:80> ServerAdmin [email protected] DocumentRoot "F:/Current Projects/sensenich.com" ServerName sensenich.roeland.bythepixel.com ErrorLog "logs/sensenich.roeland.bythepixel.com-error.log" CustomLog "logs/sensenich.roeland.bythepixel.com-access.log" common </VirtualHost>

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  • linux router setup

    - by nuttsduh
    Hi All, I a trying to setup a a linux router for the first time and i am struggling with the setup. Here how i want to setup it up: ISP line - Linux router - Linksys router - Lan. Linux router has eth0 and eth1 How do i setup this and where do i put my external ip? Many thanks,

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  • How to access Jenkins remotely on Ubuntu 12.04 server?

    - by quincyglenn
    I have installed Jenkins and opened port 8080 on Ubuntu 12.04 server but still can't access Jenkins remotely. Below is the procedures I took. # Install Jenkins, enable UFW and open port 8080 sudo apt-get install jenkins sudo ufw enable sudo ufw allow 8080 sudo ufw reload # Check the status sudo ufw status 8080 ALLOW Anywhere 8080 ALLOW Anywhere (v6) # Locally curl -I localhost:8080 HTTP/1.1 200 OK Server: Winstone Servlet Engine v0.9.10 ... # On an external machine curl -I [ip]:8080 couldn't connect to host

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