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• PHP/Linux File Permissions

  - by user1733435

  May I ask a question about file permission. I set up Ubuntu server where Apache got running. I have simple php upload form and able to upload file to /var/www/site/uploads as follows. sandbox@sandbox-virtual-machine:/var/www/site/uploads$ ll total 1736 drwxrwxrwx 2 www-data www-data 4096 Oct 18 02:53 ./ drwxrwxrwx 3 sandbox sandbox 4096 Oct 18 00:42 ../ -rw-r--r-- 1 www-data www-data 145998 Oct 18 02:53 3d wallpaper pic.jpg -rw-r--r-- 1 www-data www-data 166947 Oct 18 02:53 3D Wallpapers 9.jpg -rw-r--r-- 1 www-data www-data 1451489 Oct 18 02:53 6453_3d_landscape_hd_wallpapers_green.jpg Is there anyway to upload files and they show up as -rw-r--r-- 1 sandbox sandbox 145998 Oct 18 02:53 3d wallpaper pic.jpg -rw-r--r-- 1 sandbox sandbox 166947 Oct 18 02:53 3D Wallpapers 9.jpg -rw-r--r-- 1 sandbox sandbox 1451489 Oct 18 02:53 6453_3d_landscape_hd_wallpapers_green.jpg so that I could straight away feed them to waiting/running shell script. Right now waiting script(move,checksums,rename,resize,etc) unable to do anything to uploaded files with attributes of www-data. If I just do as local account, such as sandbox@sandbox-virtual-machine:/var/www/site/uploads$touch testfile then the script is able to run as I would like to. Any suggestion would be grateful,thanks in advance as well. Thanks for everyone giving help to me,that I was able to progress. Now I am close to getting solved and append the output sandbox@sandbox-virtual-machine:/var/www/site/uploads$ ll total 388 drwxrwxrwx 2 www-data www-data 4096 Oct 18 04:22 ./ drwxrwxrwx 3 sandbox sandbox 4096 Oct 18 04:17 ../ -rw-r--r-- 1 sandbox sandbox 166947 Oct 18 04:21 3D Wallpapers 9.jpg -rw-r--r-- 1 sandbox sandbox 219808 Oct 18 04:20 adafruit_pi.png -rw-rw-r-- 1 sandbox sandbox 0 Oct 18 04:22 test How may I set permission to uploaded files like 'test' only w difference in middle group. Such as adafruit_pi.png Vs test. Which statement shall I insert to php code,please?

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• InterVLAN routing on a HP V1910 series switch

  - by tintix

  Recently bought a HP V1910-16G switch (former 3com 29??) with IPv4 routing capabilities. After unpacking I did a firmware upgrade to the latest 5.20 Release 1513P06. I did set up additional VLANs (#2 and #3) and VLAN interfaces for those. The problem is that connected PCs on different VLAN's can't ping each other. Looks like VLAN routing doesn't even work. So here's my setup: VLAN ID VLAN interface 1 10.0.0.21/24 2 10.0.5.1/24 3 10.0.6.1/24 Have one PC connected to VLAN 2 (IP address 10.0.5.2, default gateway 10.0.5.1) and a second PC connected to VLAN 3 (IP address 10.0.6.2, default gateway 10.0.6.1) Routing table: Destination IP Mask Next Hop 0.0.0.0 0.0.0.0 10.0.0.1 10.0.0.0 255.255.255.0 10.0.0.21 10.0.0.21 255.255.255.255 127.0.0.1 10.0.5.0 255.255.255.0 10.0.5.1 10.0.5.1 255.255.255.255 127.0.0.1 10.0.6.0 255.255.255.0 10.0.6.1 10.0.6.1 255.255.255.255 127.0.0.1 127.0.0.0 255.0.0.0 127.0.0.1 127.0.0.1 255.255.255.255 127.0.0.1 The first PC can't ping the second PC one and vice versa. They only can ping their own gateways and that's all. What I'm doing wrong?

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• VLAN with trunk to avoid broadcast storm in a network with redundant paths

  - by liv2hak

  I have 6 Juniper switches (EX - 2200) connected to each other as shown in the network topology. I have two PC's that I am using PC1 - (used for configuring the 6 switches via minicom) PC2 - to monitor the traffic between the switches via the Ports that are marked with arrows in the diagram. STEP 1: I create a new vlan On Switch 3 (SW3) that includes Port 12 and Port 22. I also assign l3-interface to the vlan (vlan_2) with ip address - 192.168.1.7. Now I plug-in Port 0 of Switch 3 on PC2. Now I try pinging 192.168.1.7 from PC2 (192.168.1.10) I want to know what will happen? My postulation is that I will not be able to ping SW3 from PC2.This is because SW3 (Port 12 and Port 22) is a part of a vlan_2 and vlan_2 logically breaks up broadcast domains and so 192.168.1.7 will not be reachable from 192.168.1.10. Now I have an l3-interface on SW1 with IP 192.168.1.1 using default vlan( vlan-id 0). Similarly I have enabled IP on SW2 - 192.168.1.2 SW3 - 192.168.1.3 SW4 - 192.168.1.4 SW5 - 192.168.1.5 SW6 - 192.168.1.6 all using default vlan. I create VLAN2 with the following configuration SW3 - Port 12,Port 22. SW6 - Port 14 I create VLAN3 with the following configuration SW3 - Port 0 SW6 - Port 0 I also configure a VLAN trunk between SW3 and SW6 using the following commands. edit interfaces ge-0/0/12 set unit 0 family ethernet-switching port-mode trunk edit interfaces ge-0/0/12 set unit 0 family ethernet-switching vlan members all There is a redundant path in the network as the loop between SW3 and SW6 is closed.There is no broadcast storm in the network? What is the reason for this? I have not enabled STP or RSTP.still there is no broadcast storm.what is the reason for this. (Please ignore the CISCO symbol on the switches in the diagram.All swithes are Junper EX 22-00.)

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• A Domain Admin user doesn't have effective Administrative rights on a Domain Computer

  - by rwetzeler

  I am a developer who is setting up a virtual domain environment of testing purposes and am having trouble with the setup. I have created a new DC on a new Forest... call it dev.contoso.com. I have setup a virtual internal network for all machines that are going to be apart of this virtual test environment and have given each machine a static IP address in the 192.169.150.0 subnet. I have added machine1.dev.contoso.com to the domain dev.contoso.com. I have also provisioned a user account (adminuser) in the domain and made that user a member of Domain Admins group. Upon logging into machine1 using my newly created Domain Admin account, I cannot access/run any files on machine1. When I go into the advanced permissions for the c:\ folder and goto properties - Security Tab - Advanced - Effective Permissions and search for the dev\adminuser (mentioned above), I get an error saying: Windows can't calculate the effective permissions for admin user What do I need to do to get Administrative rights on Machine1? I am using Server 2008 R2 for both the AD controller and machine1.

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• DNS setup problems with Windows Azure VPS

  - by jbigelow

  What is the proper to setup the A record (or CNAME) for a Windows Azure VPS? I can't connect to my website after setting up IIS and believe I don't have the correct DNS setup. I created a small VPS instance with the default Windows Server 2012 configuration. I RDP'd in and added the Webserver role. In my DNSMadeEasy control panel I added an A record with my Public Virtual IP Address. In IIS I went to the default website and added bindings for the hostname of my website, so I should be able to type mywebsite.com and see the IIS 8 splash screen, but instead my browser cannot connect. I attempted to navigate to the site by typing in my Virtual IP address into the browser and still cannot connect. I RDP'd back into the machine and turned off Windows Firewall. No change, still cannot navigate to my website. From within IIS I double checked my binding. If I click "browse *:80" I can bring up my website in IE with the http:// localhost address. If I click "browse mywebsite on *.80" IE says "This page cannot be displayed.", from within the RDP session I can view the site if I navigate to http:// 127.0.0.1 but not if I navigate to my Virtual IP, nor can I view the page if I try navigating to http:// mywebservername.cloudapp.net I'm thinking I must be fundamentally not understanding how do DNS setup with Azure VPS but my initial Google searches aren't turning up any helpful information. (spaces added after the http:// so serverfault doesn't try and render them as valid urls.)

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• Is my dns server being attacked? And what should I do about it?

  - by Mnebuerquo

  I've been having some intermittent dns problems with a web server, where certain isp's dns servers don't have my hostnames in cache and fail to look them up. At the same time, queries to opendns for those hostnames resolve correctly. It's intermittent, and it always works fine for me, so it's hard to identify the problem when someone reports connectivity problems to my site. In trying to figure this out, I've been looking at my logs to see if there are any errors I should know about. I found thousands of the following messages in my logs, from different ip's, but all requesting similar dns records: May 12 11:42:13 localhost named[26399]: client 94.76.107.2#36141: query (cache) 'burningpianos.com/MX/IN' denied May 12 11:42:13 localhost named[26399]: client 94.76.107.2#29075: query (cache) 'burningpianos.com/MX/IN' denied May 12 11:42:13 localhost named[26399]: client 94.76.107.2#47924: query (cache) 'burningpianos.com/MX/IN' denied May 12 11:42:13 localhost named[26399]: client 94.76.107.2#4727: query (cache) 'burningpianos.com/MX/IN' denied May 12 11:42:14 localhost named[26399]: client 94.76.107.2#16153: query (cache) 'burningpianos.com/MX/IN' denied May 12 11:42:14 localhost named[26399]: client 94.76.107.2#40267: query (cache) 'burningpianos.com/MX/IN' denied May 12 11:43:35 localhost named[26399]: client 82.209.240.241#63507: query (cache) 'burningpianos.com/MX/IN' denied May 12 11:43:35 localhost named[26399]: client 82.209.240.241#63721: query (cache) 'burningpianos.org/MX/IN' denied May 12 11:43:36 localhost named[26399]: client 82.209.240.241#3537: query (cache) 'burningpianos.com/MX/IN' denied I've read of Dan Kaminski's dns cache poisoning vulnerability, and I'm wondering if these log records are an attempt by some evildoer to attack my dns server. There are thousands of records in my logs, all requesting "burningpianos", some for com and some for org, most looking for an mx record. There are requests from multiple ip's, but each ip will request hundreds of times per day. So this smells to me like an attack. What is the defense against this?

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• Failed to bring up eth1 in a dual ips solution in ubuntu

  - by lxyu

  I'm using ubuntu 12.04. I tried to assign two ips to two ethernet cards in my server. The content of /etc/network/interfaces is like this: auto lo iface lo inet loopback auto eth0 iface eth0 inet static address 114.80.156.a netmask 255.255.255.224 gateway 114.80.156.b auto eth1 iface eth1 inet static address 114.80.156.c netmask 255.255.255.240 gateway 114.80.156.d a b c d have different values, which means the two ips are in different vlans. But I can only bring up eth0 with this command: $ /etc/init.d/networking restart RTNETLINK answers: File exists Failed to bring up eth1. ...done. I have checked the question here which shows the same problem like the one I encountered: Can only bring up one of two interfaces But it seems it's not really solved. And in my situation, I need the 2 ips to use 2 different gateways. So how to fix this problem? Edit1, changed the example config ip from 192.168.0.0/16 subnet to another 'real' subnet. Edit2, the purpose of doing this is fairly simple. Because the ip range I previous in don't have more room for new servers, and I have to move to another ip range. So I want to make the public servers bind to 2 ips for the transition period. I only have really limited knowledge about routing and subnet. @BillThor @rackandboneman, would you please give me some keywords or links on how to setup route for 2 ips? and @Mike Pennington, how do you know I speak chinese?

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• dnsmasq(as DHCP server) isn't working in KVM+libvirt envirmont

  - by user2681054

  I'm using dnsmasq as DHCP server in VM environment. But It didn't working. I disabled basic DHCP feature in libvirt. <network> <name>default</name> <uuid>84da0678-e56d-8fc2-6f8b-e8eba784849a</uuid> <forward mode='nat'/> <bridge name='virbr0' stp='on' delay='0' /> <mac address='52:54:00:7B:64:0B'/> <ip address='192.168.122.1' netmask='255.255.255.0'> </ip> </network> As you can see, I removed this tag! <dhcp> <range start='192.168.122.2' end='192.168.122.254' /> </dhcp> And I installed dnsmasq in Host machine. During installation dnsmasq, there was an error message about 127.0.0.1.(dnsmasq: failed to create listening socket for 127.0.0.1) So I commented out listen-address option, and added dhcp-range/dhcp-option options, like this. listen-address=127.0.0.1 dhcp-range=192.168.122.100,192.168.122.200,24h dhcp-option=option:router,192.168.122.1 That's all I've done with dnsmasq. But guest VM couldn't get IP address from host which is dnsmasq server running. After that , I installed isc-dhcp-server instead of dnsmasq.... and it works! But I still want to use dnsmasq instead of isc-dhcp-server. Are there any helping hands? I disabled host machine's firewall. I've heard that libvirt basically use dnsmasq. Is this the reason why I couldn't use dnsmasq in libvirt environment?

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• Problems sending email using .Net's SmtpClient

  - by Jason Haley

  I've been looking through questions on Stackoverflow and Serverfault but haven't found the same problem mentioned - though that may be because I just don't know enough about how email works to understand that some of the questions are really the same as mine ... here's my situation: I have a web application that uses .Net's SmtpClient to send email. The configuration of the SmtpClient uses a smtp server, username and password. The SmtpClient code executes on a server that has an ip address not in the domain the smtp server is in. In most cases the emails go without a problem - but not AOL (and maybe others - but that is one we know for sure right now). When I look at the headers in the message that was kicked back from AOL it has one less line than the successful messages hotmail gets: AOL Bad Message: Received: from WEBSVRNAME ([##.###.###.###]) by domainofsmtp.com with MailEnable ESMTP; Mon, 18 Jun 2012 09:48:24 -0500 MIME-Version: 1.0 From: "[email protected]" <[email protected]> ... Good Hotmail Message: Received: from mail.domainofsmtp.com ([###.###.###.###]) by subdomainsof.hotmail.com with Microsoft SMTPSVC(6.0.3790.4900); Thu, 21 Jun 2012 09:29:13 -0700 Received: from WEBSVRNAME ([##.###.###.###]) by domainofsmtp.com with MailEnable ESMTP; Thu, 21 Jun 2012 11:29:03 -0500 MIME-Version: 1.0 From: "[email protected]" <[email protected]> ... Notice the hotmail message headers has an additional line. I'm confused as to why the Web server's name and ip address are even in the headers since I thought I was using the SmtpClient to go through the smtp server (hence the need for the username and password of a valid email box). I've read about SPFs, DKIM and SenderID's but at this point I'm not sure if I would need to do something with the web server (and its ip/domain) or the domain the smtp is coming from. Has anyone had to do anything similiar before? Am I using the smtp server as a relay? Any help on how to describe what I'm doing would also help.

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• Can I run a mix of static addressing and NAT?

  - by aroth

  Let's say that an ISP offers a plan with 5 static IP addresses, but I have more than 5 devices, many of which (such as a networked printer, for instance) I do not want or need to have a static IP address. So the topography I'm planning goes something like: ISP -> Router -> Switch -> Computer (static address) -> Computer (static address) -> Printer (DHCP/NAT) -> Tv (DHCP/NAT) -> (...) -> Wireless Devices (DHCP/NAT) Generally speaking, is it possible to run a network like that? If not, then what sort of setup do I need so that I can assign static addresses just to the things that need them, and use DHCP/NAT for everything else? Also, what internal networking devices will consume a static IP address? I'm pretty sure the router will, correct? Does the switch also?

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• Windows 2003 Active Directory Integrated DNS zone not registering non-domain computers

  - by Jeff Willener

  I'm not a networking guy by all means, I'm just a developer who dabbles enough to get into trouble and I'm there. So bear with me... :) At my office I have a Windows 2003 Domain Controller which also services DNS. On the domain I have a handful of computers and other misc. equipment/toys. For the DNS I only created a Forward Lookup Zone for my domain (mydomain.com). I run a lot of VM's so generally I have everything on the domain, however some of those VM's are not and only in a 'Workgroup'. I also have another laptop which belongs to another domain (otherdomain.com) which is here 100% but I use it for other purposes and has to belong to the otherdomain.com. With all that said, I have two questions: I have found any computer not on mydomain.com does not register it's IP address even though 'Register this connections address in DNS' is set to in the 'Advanced TCP/IP Settings' for the nic. Where have I messed this up? On the laptop which is registered on otherdomain.com, when I do a nslookup for a computer on mydomain.com (e.g. nslookup devbox1) it appends otherdomain.com as the suffix (e.g. queries devbox1.otherdomain.com). Same thing occurs if I use the fully qualified name. In the 'Advanced TCP/IP Settings' for that nic, I can 'Append these DNS suffixes' of mydomain.com but I fear that will hose my DNS lookups when I VPN to otherdomain.com. So what is the correct approach to resolve this issue? Do I add both mydomain.com and otherdomain.com in that order?

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• When I ping Internet addresses like yahoo or Google, I get 2 reply packets and 2 lost packets.

  - by navi

  I have Airtel broadband and a Tata broadband connection. i have around 50 PCs connecting through an airtel broadband connection. Both are dsl connections with my phone line going into dsl modems and an Ethernet cable going from dsl modem directly into a switch. Currently, only airtel connection is connected with static IP on my private lan and using the airtel ISP DNS servers as DNS IP address and the default gateway is 192.168.1.1 (IP add. of the dsl modem). All PCs are connected in a work group. When in full use, my users complain of certain web pages are not opening. When I ping Internet addresses like Yahoo or Google I get 2 reply packets and 2 lost packets. I suspect that a single broadband connection is not able to sustain 50 simultaneous downloads/browsing. Is there any device which connect to both DSL and make one line so that its give me high speed simultaneous browsing. Help needed urgently. Thank you all to those who reply.

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• Cannot establish a network connect to VMWare Fusion VM

  - by twolfe18

  I am running Snow Leopard 10.6.2 (not the server edition) with VMWare Fusion 3.0.0 and I trying to get my Ubuntu 9.10 x86_64 VM working. I am using a bridged connection, and I have an internet connection FROM the Ubuntu VM (I can download updates, ping websites, etc), but I cannot connect TO the Ubuntu box from any other device on my network. I am trying to get Mongrel up on the Ubuntu VM for some Rails stuff, but it's not working. I know Mongrel/Rails is not the problem because if I start the server on the Ubuntu VM, background the process, and then wget the index page, it works. I just cannot connect to the site from another IP. I have tried using a static IP and a DHCP IP configuration on the Ubuntu VM, neither work (for incoming connections, both work for outwards). I have port scanned the Ubuntu VM, and it appears that all ports are closed. However, the Ubuntu VM does respond to pings. I noticed a similar question here: http://serverfault.com/questions/99757/setting-up-a-bridged-network-with-vmware-fusion, but no answer. Any ideas?

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• Ubuntu 10.04 Server on Hyper-V Server R2 has sluggish install and command line

  - by Paul Hobart

  I've installed Ubuntu Server 10.04 (64 bit) on a Hyper-V Server R2. I've encountered two issues that I think are related: Very slow install Very slow command prompt The text-mode installer goes through a series of text-based prompt windows. It takes 7-10 seconds for each of these windows to draw on the screen. The end result is that every time I answer a prompt and hit enter I wait for 15 seconds while the screen redraws line by line. I can literally see each line of text being drawn (like the old 300 baud modems days). Once done installing, scrolling on the command line is super slow. For instance, if a simple command, like "ls", causes the screen to scroll, it will scroll very slowly. This happens on a fresh install. The server functions as a LAMP server and an OpenSSH server, but that's it (I don't even have any Virtual Hosts set up yet). AND this only happens on the Virtual Machine console. I access the console through Hyper-V Manager and don't have this problem on any of my other Virtual Machines. Also, this problem does NOT happen when accessing a shell through OpenSSH. How can I improve this performance issue?

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• ProCurve network expansion

  - by Blue Warrior NFB

  I've hit a bit of a wall with our network scale-out. As it stands right now: We have five ProCurve 2910al switches connected as above, but with 10GbE connections (two CX4, two fiber). This fully populates the central switch above, there will be no more 10GbE Ethernet connections from that device. This group of switches is not stacked (no stack directive). Sometime in the next two or three months I'll need to add a sixth, and I'm not sure how deep of a hole I'm in. Ideally I'd replace the core switch with something more capable and has more 10GbE ports. However, that's a major outage and that requires special scheduling. The two edge switches connected via fiber have dual-port 10GbE cards in them, so I could physically put another switch on the far end of one of those. I don't know how much of a good or bad idea that would be though. Is that too many segments between end-points? Some config-excerpts: Running configuration: ; J9147A Configuration Editor; Created on release #W.14.49 hostname "REDACTED-SW01" time timezone 120 module 1 type J9147A module 2 type J9008A module 3 type J9149A no stack trunk B1 Trk3 Trunk trunk B2 Trk4 Trunk trunk A1 Trk11 Trunk trunk A2 Trk12 Trunk vlan 15 name "VM-MGMT" untagged Trk2,Trk5,Trk7 ip helper-address 10.1.10.4 ip address 10.1.11.1 255.255.255.0 tagged 37-40,Trk3-Trk4,Trk11-Trk12 jumbo ip proxy-arp exit

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• How can I bridge a VM to a remote network?

  - by asciiphil

  I have a system running QEMU/KVM (via libvirt). One of its VMs needs to have a presence on a subnet that is not local to the VM host. I have a Linux system on the remote subnet. Is there a way to set up some sort of tunneled bridge to cause the VM to appear present on the remote system? This will be a temporary situation (hopefully just until the VM owner can configure their system) and network performance and long-term maintainability aren't really issues. To give some more concrete information: My VM host has IP address 192.168.54.155/24. The VM has IP address 192.168.65.71/24. I have a remote system at 192.168.65.254/24. Both the VM host and remote system are running Scientific Linux 6.5. I do not control the network or routing in between the VM host and remote system. I do not have access to the guest OS on the VM. I would like traffic to the VM's IP address to end up at the VM even though its host isn't directly connected to the appropriate network. I've tried using iproute2's tunnelling, but Linux won't let me add a tunnel to a bridge. I've considered using some sort of iptables mangling to route traffic over the tunnel and make the VM think it's on the right network, but I'm not sure whether there are better approaches. What's the best way to accomplish this hack?

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• How to change mod_rewrite to avoid {REQUEST_FILENAME} in order to get around 255 character URL limit?

  - by Jeremy Reimer

  According to this answer: max length of url 257 characters for mod_rewrite? there is a maximum 255 character hard limit based on the file system for using mod_rewrite. According to the accepted answer, there are two solutions: Change the URL format of your application to a max of 255 characters between each slash. Move the Rewrite rules into the apache virtual host config and remove the REQUEST_FILENAME. I cannot use the first method, so I am trying to figure out the second. I have put the Rewrite rules into the Apache virtual host config as requested. However I cannot figure out how to remove the REQUEST_FILENAME and still have my web application framework (Dragonfly) still work. Here is the portion of the rewrite rules that I moved from .htaccess into the virtual host config file of Apache: RewriteCond %{REQUEST_FILENAME} !-d RewriteCond %{REQUEST_FILENAME} !-l RewriteCond %{REQUEST_FILENAME} !-f [OR] # if don't want Dragonfly to process html files comment # out the line below (you may need to remove the [OR] above too). RewriteCond %{REQUEST_FILENAME} \.(html|nl)$ # Main URL rewriting. RewriteRule (.*) index.cgi?$1 [L,QSA] I've tried removing {REQUEST_FILENAME} and it just breaks the framework in various ways. How do I rewrite this without using {REQUEST_FILENAME}?

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• Read Only Domain Controllers and DNS zone updates

  - by Mike M

  I have a Windows 2003 domain and just added a new DC that runs 2008 R2. I updated the schema accordingly for both forest and domain levels. I also made sure to run /rodcprep at the time I did this. I have a branch office with a 2008 R2 file/print server that is a read-only domain controller (DC). The one problem I have been having is with AD-integrated DNS records updates. In the data center, we had to make an IP address change on a particular server. All our other sites' DCs (2003) updated the record fine. The 2008 R2 DC in the data center also updates its record fine. However, the RODC in the branch office does not. So if I nslookup the target server on a 2003 DC, the IP address is correct. Same with the 2008 R2 DC in the data center. But an nslookup on the branch office RODC still pulls in the old IP address. Moreover, any new records we've created (e.g., just added a new terminal server) do not get updated on the branch RODC either. Is there something simple I'm missing? How do I get the RODC to sync its AD-integrated DNS records with the rest of my world? Thank you in advance for your responses. Mike

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• How to connect through a proxy using Remote Desktop?

  - by scottmarlowe

  So I've got a home server running Windows Server 2003. I use a dual network card setup and Routing and Remote Access to link the internal, private network to the external connection. The external connection hooks directly to my cable modem (so no routers or other devices sitting between). The problem I'm having is that I can't connect remotely from a location outside the house (so connecting to the server's external connection) to the server using either Remote Desktop or VNC. I have enabled both ports in Routing and Remote Access's firewall to allow access, and I have enabled Remote Desktop in Windows Server 2003. The odd thing is that I can access my home server's SVN repository and I can even ping the server's IP. I am using the IP to attempt to connect, though I use a dyndns.com provided name to connect to my SVN repository, so it shouldn't make a difference (I know the IP is getting resolved correctly). Any ideas on where to start diagnosing this one? I haven't seen anything in my server's event log. If any other info is needed, let me know. Thanks. UPDATE: One last piece of information: We use a proxy server at work, which I'm nearly 100% sure is the culprit. I have a workaround--if I connect to our VPN (even though I'm already inside the building) I am able to connect to my home server. This is with VNC. However, is there a way to connect through a proxy using Remote Desktop? ONE MORE UPDATE: Indeed, it was the http proxy I'm sitting behind at work that was causing the issue. An acceptable workaround is to use my VPN connection to bypass the proxy, and I'm in!

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• Issue resolving names on Hyper-V guest with Routing and Remote Access

  - by John Sheehan

  I've got a Win2k8 standard server running Hyper-V with a Server 2003 web guest instance running. The host is publicly available on the internet. I've created an Internal Private network in the Hyper-V Virtual Network manager. I've set the host IP for that virtual adapter to 192.168.0.1. I've set the IP on the guest to 192.168.0.2. They can ping each other and share files. I can't browse the web on the guest though. NSLOOKUPs are working. I've tried setting the DNS server setting on the guest to 192.168.0.1 and something external like Google's 8.8.8.8 server to no avail. Windows firewall is disabled on the internal virtual network. I've tried it with both DNS installed on the host and without it. I'm not sure which RRAS/NAT settings are relevant to pass on so ask if you need me to clarify anything. How do I get outbound internet working on the guest VM?

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• How to add commands of windows to local shell of XShell 4

  - by dylanninin

  XShell is a very powerful tools to ssh remote computers such as Unix/Linux. And it has built some internal commands for you to run within your Windows. Xshell:\> help Internal Commands: new: Creates a new session. open: Opens a session or the session dialog box. edit: Opens the Session Property dialog box for a session. list: Lists information of all available sessions. 'ls' and 'dir' do the same. cd: Changes the current working directory. clear: Clears the screen/address/command history. help: Displays this help. '?' does the same. quit: Quits Local Shell. 'exit' does the same. ssh: Connects to a host using the SSH protocol. telnet: Connects to a host using the TELNET protocol. rlogin: Connects to a host using the RLOGIN protocol. sftp: Connects to a host to transfer files securely. ftp: Connects to a host to transfer files. External Commands: ipconfig: Configures TCP/IP network interfaces. ping: Sends ICMP ECHO_REQUEST packets to network hosts. tracert: Prints the route packets take to network host. netstat: Displays current protocol statistics and current TCP/IP network connections. nslookup: Resolves a hostname to IP address. For more information, type 'help command' for each command. ex) help telnet But these commands are limited, so how to add commands of windows to local shell of XShell 4

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• How to prevent nginx from locking files on mounted samba partition in Centos 6

  - by Bruce Kirkpatrick

  I'm using nginx 1.3.8 inside a centos 6.3 virtualbox 4.2.4 virtual machine. The system is running the latest software available via yum update. The host OS is windows 7. The site files nginx is serving are on mounted samba partition, which is a folder on the host Windows system. I.e., inside linux, nginx paths are referring to /home/vhosts and this is mounted from D:\vhosts\ on windows. The samba partition is mounted as root with 777 privileges. /etc/fstab looks like this, but with real ip, username, password: //hostip/vhosts /home/vhosts cifs username=username,password=SECRETPASSWORD,uid=root,gid=root,file_mode=0777,dir_mode=0777,rw,_netdev 0 0 I.e. linux/nginx reads from the windows share, and not the opposite. in /etc/samba/smb.conf, I have tried to disable all samba locking features, but it seems to have no effect even after rebooting the virtual machine. locking=no share modes=no oplocks = no level2 oplocks = no kernel oplocks =no I'm receiving "Access is denied" errors in Windows or linux when attempting to overwrite the javascript file in windows that has been accessed at least once with nginx. If I run "service nginx reload", the lock is removed and I'm able to save the file. That's why I think it is nginx causing the lock. The same problem occurs with directories. However, that may be a different issue not related to the use of samba. I'm using samba so that I can manage the source code outside of the virtual machine. Also note that after I run "service nginx reload", the file I'm editing is actually automatically deleted from the windows host. SOLVED: I just reviewed my nginx.conf file. It appears the "open_file_cache" feature is what is causing the lock and deleted files. When I set this option to open_file_cache off;, My problem is resolved. I will repost as the answer when it allows me to do so.

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• simple network between xp & 7 with cross cable problem...

  - by LostLord

  hi my dear friends : i have a simple network between xp & 7 windowses with cross cable (2 pc home)... ===================================================================== the one with 7 is mother and have 2 lan device (onboard + pci) A. onboard is like this when u go to tcp/ip v4 properties:(4 adsl internet) obtain an ip... preferred dns server : 81.91.129.67 alternate dns server : 4.2.2.4 shared...no permission 4 change so every thing is ok for internet on windows 7. B. the other lan pci card that is connected to pc with xp is like this : 192.168.2.11 255.255.255.0 0.0.0.0 empty empry computer name : cougar workgroup : nethome homeNetwork is disabled (i think that is 4 2 pc's with 7 os not xp) every thing is off in network options except file & printer sharing in public area ===================================================================== pc with xp os is like this : 192.168.2.12 255.255.255.0 192.168.2.11 (mean gateway) 4.2.2.4 8.8.8.8 computer name : tiger workgroup : nethome ===================================================================== at last my little net is ok... mean both have internet , both can see each other by their ip (\\192.168.2.11 or \\192.168.2.12) my problem is when in pc with xp type \\cougar it shows an error about network path! but in pc with 7 \\tiger works perfec. what is the problem in system with xp ? in few days ago this network was ok (search by computer name) when both os were xp , so there is no problem with my cable or devices. another problem is i can not find tiger in my network list in 7 pc \ why? is something wrong with my network? thanks 4 future advance best regards

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• Are Colocation Cross Connects Worth While

  - by SvrGuy

  We currently operate three clusters of collocated machines in different data centers. Recently, I became aware that our newest data center will offer to cross connect us to a bandwidth provider free of charge. In the past, I never really investigated a cross connect for bandwidth because I figured that the rates would be similar to what we are paying the colo now and that it would reduce our resiliency (because we would only be using one or two carriers for IP, where as the colo uses, say 8 different providers). Then I saw an ad for hurricane electric internet services (http://he.net/cgi-bin/ip_transit_quote) that gave a price for IP transit at $1/Mbs, which is much better than the $30/Mb we pay for the blended bandwidth. What are people out there typically paying for bandwith via cross connect and how hard is to setup? Is my understanding that what you do is open agreemetns with two or three ISPs, cross connect to them and then configure your top of rack router on their network. Can you really get IP transit down to a couple of dollars per megabit per month just by doing the routing yourself? Or, is my understanding of cross connection fundamentally wrong?

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• Ubuntu 12.04 glusterfs volume failed to mount at boot time

  - by user183394

  I have just setup 7 KVM guests, all running Ubuntu 12.04 LTS 64bit Minimal server to test out glusterfs 3.2.5 from the Ubuntu official repo. Two of them form a mirrored pair (i.e. replica 2), and five of them are clients. I am still new to this file system and would like to gain some "hands-on" experience. The setup was mostly uneventful, until I put in the following into each glusterfs client's /etc/fstab: 192.168.122.120:/testvol /var/local/testvol glusterfs defaults,_netdev 0 0, where 192.168.122.120 is the IP address of the first "glusterfs server". If I issue either a manaul mountall or a mount.glusterfs 192.168.122.120:/testvol /var/local/testvol on CLI, a mount shows that the volume is successfully imported. But once a client is rebooted, after it comes back up, the volume is not mounted! I searched the Internet, and found this article, but since I am not running both client and server on the same node, IMHO it's not strictly applicable. So, as a kludgy "get-around", I put in a sleep 3 && mount.glusterfs 192.168.122.120:/testvol /var/local/testvol into each client node's /etc/rc.local. It seems to be able to get the volume mounted on each node, as far as I can tell. But this is quite ugly, and I would appreciate a hint as to how to resolve this glusterfs-non-boot-time-mounting issue correctly. Note that I used the IP address of the first "glusterfs server" although the /etc/hosts of all nodes have been populated with their hostnames. I figured that the use of IP address is more robust. --Zack

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