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• How to backup data from linux servers to linux server (incremental + snapshot)?

  - by wag2639

  We have a handful of hosted servers running RHEL4 and RHEL5 and would like to backup some key folders (I'm thinking /var /srv and /etc) to a local server we have in house. The local server is running Ubuntu 9.10 Server edition. I'm looking for a free (preferably OSS) way to grab (or push) incremental backups to my local server and once a month or so, make a new snapshot for incremental updates in between snapshots. Also, while I'm comfortable with using a command line, others may need to use the system in the future, and I would like some kind of graphical or web interface to browse the backup repository. Suggestions?

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• Change ip route metric

  - by notphunny

  I'm constantly switching between eth0 and wlan0 interface on my archlinux because I often change OpenWrt fw images on my second router (which isn't connected anywhere). So I have problem with my routes when I'm connected to my wlan and want to connect with Ethernet to my router. Both routers are on 192.168.1.1/24 and after connecting to my Ethernet profile eth0 route becomes default one (which is ok for the time), because of smaller metric I guess. So I'm interested, how can I change routes metric so my applications can be connected to the internet (through out wlan)? Maybe there is solution not to use Default Gateway on Ethernet profile, however I still want to know how to change metric. Or default route if there are more then one.

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• Why can't I access the WebUI of my DNS-323 NAS after a firmware upgrade?

  - by anonymous2

  Hi Everyone, I just bought a D-Link DNS-323 NAS Enclosure, and have run into a problem. I read that the firmware that had shipped with (1.07) did not support 2TB drives, so I downloaded firmware 1.08. Turned on the device for thwe first time and went straight to the WebUI (everything looked/worked fine) Proceeded with the firmware update, completed successfully. Rebooted and I cannot access the WebUI. I can see the NAS connected via my router interface I can also ping the ip adress assigned, but I cannot access the WebUI or find it via D-Link easy search software. I have tried the factory reset button, but that does not seem to be doing anything, the square blue light just keeps flashing from the moment the unit is powered on, whether I press the reset button or not, and the symptoms remain the same... PS. I did/do not have any drives installed yet. Please help?

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• Configure Virtualbox guest with static IP, SSH and internet access from host

  - by koskoz

  I have an Ubuntu Server 12 virtualbox guest running on a Windows 7 host which has a dynamic IP (and I don't wanna change this considering it's a laptop and I'm changing network frenquently). I want to have a static IP for my VM and a SSH access from my host but I still want to have the internet access on my VM. I tried added a second host only adapter and configured /etc/network/interface to set eth1 to a static ip, but I can't connect via SSH to it. Setting only adapter1 to host only works for SSH and static IP but I lose the internet access.

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• Is there other usage of Comcast extension cable and splitter?

  - by Tim

  I have an unused Comcast high-speed internet self-install kit from 2006. It has two coils of extension cable, and a splitter, and some screws. The name of the cable is "extension cable" printed on the package. I wonder if that is its actual name? As ethernet cables are always useful, I wonder if the extension cables are totally worthless and should be tossed into a trash can? Or are they usable for some other purposes, or even sellable? Thanks! SVI Digital SV-2G Splitter (5/1000MHz): One interface of the cables: Screws

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• Route gaming data over wireless and everything else through LAN?

  - by Alex

  I have two internet connections available to me. One is via LAN.. not a great ping, but fast downloads. The other is via USB wireless adapter.. good ping, but slow downloads. I want to connect to both of them simultaneously. I want to be able to specify which data or application will use the wireless connection and route everything else through the lan connection. Is this possible, and how would I do it? Windows 7 x64 is my operating system. Here is the data from route print: http://pastebin.com/vsjQRpSM I'm still unsure of how to use this to make all of my data go through the nvidia lan interface, even after reading route /? Also, if I'm able to achieve that, will it override the ForceBindIP?

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• cannot using internet in VMWare

  - by user66247

  I am using VMware Workstation version 7 on Ubuntu 10.10. I installed Windows XP service pack 3 for guest os. Within VMWare, I am using bridge connection that I assigned static IP address to be able to ping host IP address but I cannot ping default router gateway. I also tried to command "/etc/init.d/vmware start" on terminal. All tasks are able to start successfully except "VM communication interface socket family" I am not sure that how to setup network for my VMWare by using wireless. Thanks in advance.

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• Linux clients for Exchange (email and) calendar

  - by jplindstrom

  At $work, the official email solution is Outlook on Windows, connected to an Exchange server. That's problematic for people with Linux on their desktop machine. The Exchange server supports IMAP, and e-mail works fairly well using the usual suspects, e.g. Thunderbird. It also provides the web mail interface, which is fairly crap unless you use IE. (Any other favorite e-mail clients?) The biggest problem is the Outlook Calendar. I still have found no viable Linux client that can replace it. Any recommendations?

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• Duplicate of IPSEC certificate template not displaying

  - by Tim Brigham

  I am working on getting IPSEC working on computers outside my domain. I am unable to get a duplicate of the IPSec Offline Request template to show on the web interface. My CA is 2008 R2 Enterprise and the permissions on the template should be adequate to allow me access (my account has read and enroll). If I publish the original template it functions as desired. I also have other custom templates in use (although using autoenrollment). The duplicate is almost identical to the original, excepting that it has a longer validity period and the private key is marked as exportable. How do I debug at this point?

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• Facing difficulty with migrating from wordpress to Drupal

  - by rakibtg

  One of my blog was build of Wordpress but now i want to use Drupal as the CMS of my Blog. To do so I have deleted all the Wordpress files from my server and the Database and MySQL user which are associated with wordpress blog and uploaded the Drupal files in my server directory where the wordpress files were. But, when i have opened the blog it shows the Wordpress blog! though its been deleted and their should be the Drupal Installation interface. So, i have re-checked my server directories and database, there is not wordpress files and wp database all are deleted, there is only the drupal files, but when i go to the blog to install drupal there is still the Wordpress blog, I have checked the blog in many web browsers and there is not cache memory problem. My hosting server is linux based. can't understand what to do? Any idea? Thanks

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• Installed Windows 7 without formatting disk? Possible?

  - by ile

  I've just installed Win7 but I'm little confused. When booting from XP cd, there is an option to format hard drive. After choosing which partition to format, format process takes usually not less than hour (depends on size of partition), but when I clicked on Format when in Windows 7 installation interface, I received some message (I cant remember what was it, but it was not any error message or something like that) and that was it. After that I choose to install Windows 7 and installation began. "Expanding Windows Files" was the longest process of installation. Was that the part when the hard drive was formatted? I don't understand what happened? Is it possible that my hard drive was not formatted but still installation was successful?

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• Connecting via url to a server that is on the same network as me

  - by Axehead

  Good day, I'm having problems with the ftp server I've just set up. I've already managed to configure my modem and wireless router to open up port 21 and setup ftp in my server. But It seems that when I try to connect to it when I'm in the same network as the server via URL, (ftp://mydomain.com) it redirects me to the modem's web interface. But then when I try to connect to it outside the network using a different internet connection. It succeeds. It also succeeds when I'm in the same network and I go to ftp://192.168.., the server's local IP. Am I supposed to adjust something in the modem or router? Or is this a different problem altogether? BTW I'm using Windows Server 2008 r2 as my server's OS and using IIS for ftp.

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• Can I set up two NICs bridged together and still SSH into the bridging machine?

  - by squinlan

  I have a ubuntu box setup with two NICs. I can bridge them together just fine, but I haven't been able to setup a way to SSH into the box once the connections are bridged together. Here's my /etc/network/interfaces: auto lo iface lo inet loopback auto eth1 iface eth1 inet manual auto eth0 iface eth0 inet manual auto br0 iface br0 inet static address 192.168.33.213 netmask 255.255.255.0 gateway 192.168.33.1 bridge_ports eth0 eth1 bridge_stp off bridge_fd 0 bridge_maxwait 0 This works just fine for bridging, but I'm not able to SSH into the box. I tried setting up another interface on one of the NICs: auto eth0:1 iface eth0:1 inet static address 192.168.33.215 netmask 255.255.255.0 gateway 192.168.33.1 But this really didn't help. Is it possible to ssh into a machine that has all of its NICs bridged? If it is, how?

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• How to secure a new server OS installation

  - by Pat R Ellery

  I bought (and just received) a new 1u dell poweredge 860 (got it on ebay for $35). I finished installing Ubuntu Server (Ubuntu Server 12.04.3 LTS), install apache/mariadb/memcache/php5 works great but I am scared about security. so far I am the only one using the server but eventually more people (friends, friends of friends) will use this server, use ssh etc... I want to know what can I do to secure all the information and not get hacked, both from the web or ssh or ddos and any other attack possible. Does Ubuntu Server does it for you right away? or I have to fix it my self? Thank you EDIT: I installed (so far): All dev tools ssh server LAMP I didn't install: Graphical interface

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• Connecting to a 2.5" laptop drive using USB

  - by user27449

  So I swapped my MBP hard drive with a SSD drive, and I want to connect to my old hard drive. I bought a nextstar 3 external 2.5" drive enclosure that has a USB 2.0 interface. I watched an online video of an older version of the enclosure, and in the video they had a ATA cable to connect to the drive. My enclosure didn't come with anything like that, and there doesn't seem to be a way to connect to my drive (my old drive is a seagate 500gb momentus 7200 RPM). My laptop is about 2 years old now (MBP 17"). The drive doesnt' have pins to connect, it has a wide plug type connector, and a USB connector also (I was able to directly plugin the USB cable to the drive, but didn't connect it to my computer, was just testing thigns out). Is it safe for me to directly connect the cable that came with the enclosure to the drive, and then connect the other end to my computer? Does this single cable provide power and data transfer?

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• Accessing Application Server directly by public IP in citrix Farm

  - by EmilioG

  I have an citrix application server in SiteB and I have a Farm in SiteA. We want to add this server into that Farm in SiteB, and access it from the internet via web interface. SiteA and SiteB are connected via VPN. But we would like to do that in a way the ICA traffic goes directly to the application server public IP (behind NAT) in siteB without using siteA and the VPN to route this traffic. Do you know if this is posible? Maybe there is a way to change the host in the ica file for this server in the webinterface (without editing manually each time)? We are using Citrix 4.5. Thanks in advance.

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• Multiple network interfaces and UDP packets distribution

  - by Robert Kubrick

  I have a Linux server with 2 1Gb network interfaces eth1 and eth2. If I start 2 clients listening to the same multicast address and each client connects through a different NIC (say client 1 listens to the multicast through eth1 and client 2 through eth2), then client 2 gets duplicate UDP packets. If both clients use the same interface eth1 on the other hand, both clients work fine. I have already tried to set arp_filter and proxy_arp to 1 (arp flux issue) but it hasn't solved the issue. Is this a Linux kernel problem? Or is there another way to setup the interfaces correctly?

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• How to attach multiple ipv6 ips to eth1 on debian

  - by Noodles

  I've just got a new server with native ipv6. I want to attach multiple ipv6 ips to eth1, but the only way I can see to do so is to attach them individually: i.e. address 2607:f0d0:xxxx:xxxx::2 address 2607:f0d0:xxxx:xxxx::3 address 2607:f0d0:xxxx:xxxx::4 Is it possible to bind whole subnets of ipv6 to a single network interface on debian? My server host tells me I have 18,446,744,073,709,551,616 ipv6 addresses for that server, surely it gets to be a nightmare to manage if they all have to bound individually (plus ifconfig would look messy). Does anyone have a solution?

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• Our company has 100,000s+ photos, how to store and browse/find these efficiently?

  - by tobefound

  We currently store our photos in a structure like this: folder\1\10000 - 19999.JPG|ORF|TIF (10 000 files) folder\2\20000 - 29999.JPG|ORF|TIF (10 000 files) etc... They are stored on 4 different 2TB D-link NASes attached and shared on our office network (\\nas1, \\nas2, and so on...) Problems: 1) When a client (Windows only, Vista and 7) wishes to browse the let's say \\nas1\folder\1\ folder, performance is quite poor. A problem. List takes a long time to generate in explorer window. Even with icons turned off. 2) Initial access to the NAS itself is sometimes slow. Problem. SAN disks too expensive for us. Even with iSCSI interface/switch technology. I've read a lot of tech pages saying that storing 100 000+ files in one single folder shouldn't be a problem. But we don't dare go there now that we experience problems on a 10K level. All input greatly appreciated, /T

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• Why can't my FreeBSD 6.1 (vmware player client under Win7) do DNS in Bridged mode.

  - by Walter Stickle

  I have a 64-bit FreeBSD 6.1 client, running under Windows 7 (64-bit) via VMWare player 3.0, with networking set to bridge mode. DHCP goes fine on boot... I get correct adress/gateway/nameserver info... I have good connectivity to the world in that I can ping any host I can name by IP addr, (including both of the nameservers in resolv.conf,) ...but I can't resolve any names. Inside the Windows box, the network interface has VMWare Bridge Protocol enabled, and the windows side of things has full connectivity. dig replies with: ;; connection timed out; no servers could be reached ...even if I use "dig @server_ip_addr" to point it at a pingable, working nameserver If I set VM networking to NAT mode, I can get outbound connectivity (with happy DNS) but, of course, can't do INBOUND connectivity, which I need. Thoughts?

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• Three disk (possibly RAID) data recovery

  - by Martin

  I have on my desk three 160 GB disks that were once part of an HP Proliant Windows 2003 Server. They may have been part of a RAID configuration of some sort. They may or may not be damaged in some way. When I interface them via USB, one of them shows up as a drive, but unformatted. The others show up as uninitialized disks in manager. An alternative explanation is that the two drives were simply not unused. What's my first step? I've recovered data off damaged drives before but never had anything to do with RAID configs. How can I even tell if any type of RAID was used?

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• What are the methods of separating network spaces in a LAN?

  - by dash17291

  Please detail me the methods. My thoughts: put the servers in separate (sub)networks the servers are forced to go through the firewall but no NAT is required assign more IP addresses to the internal interface of the server choosing gateway addresses from the clients and servers IP address ranges split DNS Netfilter/{iptables, ipset} could be heavily involved, I'm talking about Linux servers. See for example: Destination NAT Onto the Same Network from internal clients Please do not explain what is NAT or DNS. This is a theoretical question, but my poor English knowledge prevent me to describe it in a fancy fashion.

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• which mail server is better suited for high volume? [closed]

  - by crashintoty

  I'm planning out a project (web/mobile app) that would require a mail server that could handle hundreds of thousands connections per hour (both IMAP/POP and SMTP) and has the ability to interface with PHP (or python or whatever) to dynamically create, delete and check for mailboxes? This is not for spam stuff, I just need my app to generate random mailboxes (and static/permanent ones too) to receive mail and process it for items listed on my service. The little research I've done so far has turned up courier, dovecot, cyrus and haraka. I think the ability to scale and/or load balance (I'm new to these terms, pardon me) would also be a requirement. Any ideas?

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• Can't get port forwarding to work on Ubuntu

  - by Znarkus

  I'm using my home server as NAT/router, which works well. But now I'm trying to forward port 3478, which I can't get to work. eth0 = public interface eth1 = private network $ cat /proc/sys/net/ipv4/conf/eth0/forwarding 1 $ cat /proc/sys/net/ipv4/conf/eth1/forwarding 1 Then to forward port 3478 to 10.0.0.7, I read somewhere that I should run iptables -t nat -A PREROUTING -p tcp -i eth0 --dport 3478 -j DNAT --to-destination 10.0.0.7:3478 iptables -A FORWARD -p tcp -d 10.0.0.7 --dport 3478 -m state --state NEW,ESTABLISHED,RELATED -j ACCEPT I also ran ufw allow 3478 But testing port 3478 with http://www.canyouseeme.org/ doesn't work. Any idea what I have done wrong?

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• Port forwarding using IP Tables

  - by Darider

  I have a server with a LAN facing address of 192.168.5.100 (eth0) and another LAN facing address of 192.168.6.6 (eth1). On this server I have a Virtualbox instance of fedora running an apache webserver (on port 8080) with a bridged interface to eth1 on the host server with address of 192.168.6.7 Users on the 192.168.6.x network can access the Webserver on the Vbox instance (192.168.6.7) with no problems. My question is what kind of iptables entries or commands should be made/executed so as to allow for users on the 192.168.5.x network to access the webserver on the vbox instance. (I'm hoping their url can be something like: http://192.168.5.100:8080)

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