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• Why might one host be unable to access the Internet, when it can ping the router and when all other hosts can?

  - by user1444233

  I have a Draytek Vigor 2830n. It's kicking out a 192.168.3.0 LAN. It performs load-balancing across dual-WAN ports, although I've turned off the second WAN to simplify testing. There are many hosts on the LAN. All IPs are allocated through DHCP, most freely allocated from the pool, but one or two are bound to NIC MAC addresses. All hosts can access the Internet, save one. That host (192.168.3.100 or 'dot100' for short) gets allocated an IP address (and the right gateway address, DNS server addresses, subnet etc.) dot100 can ping itself. It can ping the gateway, and access the latter's web interface via port 80. It's responsive and loss-free (sustained ping over a couple of minutes reports no data loss). Yet, for some reason that evades me, dot100 can't ping an external IP address or domain name. I suspect it's never been able to, because it was getting some Internet access from a second adaptor (different subnet), but that's now been turned off, which exposed the problem. In dot100, I've tried: two operating systems (Windows 8 and Knoppix), to rule out anti-virus programs etc. two physical adaptors two cables, on each adaptor two IPs (e.g. .100 and .103 assigned by Mac and .26 from the pool) both dynamic and assigned (MAC-bound) DHCP-allocated IPs but none of this experiments yielded any variation in the result. dot100 is a crucial host. It's a file server for the network, so I need it to be reliably allocated a consistent IP. Can anyone offer a potential solution or a way forward with the analysis please? My guess My analysis so far leads me to believe it's a router issue. I've checked the web interface very carefully. There are no filters setup in Firewall - General Setup or Filter Setup. I suspect it's a corrupted internal routing table, but the web UI shows this as the Routing table: Key: C - connected, S - static, R - RIP, * - default, ~ - private * 0.0.0.0/ 0.0.0.0 via 62.XX.XX.X WAN1 * 62.XX.XX.X/ 255.255.255.255 via 62.XX.XX.X WAN1 S 82.YY.YYY.YYY/ 255.255.255.255 via 82.YY.YYY.YYY WAN1 C 192.168.1.0/ 255.255.255.0 directly connected WAN2 C~ 192.168.3.0/ 255.255.255.0 directly connected LAN2

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• How to find ip address of my Asus RT-AC86U in Access Point mode?

  - by WilliamKF

  I'm using an Asus wireless router model RT-AC68U and can connect fine to the internet using it wirelessly. I configured the router to be an Access Point, but having done so, I can no longer locate the GUI to adjust the router as I have no idea what its IP Address is anymore. The router is plugged into a cable modem and router which is a model SMCD3G is a business class gateway labeled Comcast Business IP Gateway. This gateway is assigning ip addresses in the range 10.1.10.XX and I went to the web interface at 10.1.10.1 and listed the connected devices and see my laptop which is connected to the Asus access point along with a few other devices, but none of the devices listed are the Asus router (I tried all the six ip addresses listed). How can I determine the IP Address of my Asus router in access point mode so I can see the GUI interface again to control the router other than by doing a factory reset?

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• iSCSI - what's faster?

  - by Unplugme71

  I have a DroboPro that is currently connected to a GS748TS switch. Also connected to the switch is a server and few workstations. Which method would be better in performance? Add a NIC to the server. Direct connect the DroboPro via iSCSI to the new NIC. Add a NIC to the server. Create a dedicated VLAN for the new NIC and Drobo. Add a NIC to the server and attach it to a separate switch. DroboPro connects to the switch. Becomes a private network, similar to a VLAN. DroboPro has a single ethernet connection. Server has a single ethernet connection (currently). Workstations each have a single ethernet connection.

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• Closing telnet connection gracefully from session mode itself without going to telnet prompt.

  - by Kumar Alok

  a normal telnet connection is like this: telnet localhost 22 Trying 127.0.0.1... Connected to localhost. Escape character is '^]'. SSH-2.0-OpenSSH_4.2 ^] telnet close Connection closed. I want to close it from telnet session itself without coming to telnet prompt by pressing. My requirement is that if i press some control character from telnet session itself like CTRL+A so it will come out of session and close it automatically. something like this: $ telnet localhost 22 Trying 127.0.0.1... Connected to localhost. Escape character is '^]'. SSH-2.0-OpenSSH_4.2 ^A Connection closed. $ I tried all the options given at the man page and tried to do some $HOME/.telnetrc file tests but couldn't achieve it, as telnetrc will execute all the commands written in it with the given host whenever a telnet to that host is done. Can anyone help me in this, like how it can be achieved.

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• How to configure 2nd network card for use in VMWare Workstation?

  - by Timo

  Hi all, I am using VMWare Workstation 6.5, connected to my network with a bridged adapter so that the virtual machine OS (Windows XP) has its own IP adress. This just worked out of the box. Now my host machine (Windows Vista) has an additional network card that is directly connected to another computer using a crossover cable (and fixed IP adress 10.1.1.4, while the "main" network connection is using DHCP with IP in the 192.68.0.* range). How can I use that network connection as well in the virtual machine? Do I need to bridge my 2nd network adapter to some VMnetX adapter? Do I need to add a host virtual adapter? I do not know much about networks, and the VMWare network settings really confuse me :-) Thanks, Timo

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• Multiple interfaces to one IP address?

  - by Delan Azabani

  At present, I have: a Netgear router with DHCP off at 192.168.0.1 my computer eth0 at 192.168.0.2 wlan0 at 192.168.0.2 The wlan0 interface always connects to the router, while the eth0 interface connects to other computers with crossover and acts as a dnsmasq DHCP server for network boot and installation. If I use the Gnome NetworkManager to enable both connections, that is, with wlan0 connected to the router/internet and eth0 to another computer, both as 192.168.0.2, I cannot access the internet while eth0 is connected. Why is this? How can I configure my computer to follow wlan0 for Internet usage, but use eth0 for itself (the latter is working but blocking wlan0).

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• Windows 7 Utlimate x64 - No Internet access

  - by rafek

  I've just installed Windows 7 Ultimate x64. As all of my computers at home I've connected to my router via wifi (open/wep). And what has happened is that Wireless Connection is Connected but with No Internet access -- my ipconfig says: Autoconfiguration IPv4 Address : 169.254.33.161 Subnet Mask : 255.255.0.0 Default Gatewawy : (empty) After ipconfig /renew I get: An error occurred while renewing interface Wireless Network Connection : unable to contact your DHCP server. Request has timed out. [..] I'm looking for a solution for 2 hours now...

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• Time capsule on windows 7

  - by Kiva

  Hi guys, I have a time machine to backup my mac book pro. All work fine with it. Now, my girlfriend have a PC on windows 7. She wants to backup her PC with cobian backup on the time machine. But her PC doesn't see the time capsule, so it's impossible to connect it. The Time capsule is connected on my box adsl with wifi and the mac and the pc are connected on the box with wifi. Why windows doesn't see the TC ? I installed "bonjour" on the PC but nothing worked. Thanks for your help.

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• Website not available everywhere

  - by Cedric Reichenbach

  Today I noticed my website http://mint-nachhilfe.ch/ was down, but other people (located in different networks) said it looks up from there. When I came home, I double-checked, and I can really reach it from here. Also, this website considers it down. Some facts: It's a Tomcat webapp, connected to an Apache2 server. I restarted both, no change. Another (ruby on rails) application is connected to this Apache2, which I couldn't reach either, but is considered online by above check website. At any point, I could directly connect to the Tomcat over http://mint-nachhilfe.ch:8080! I don't know how to go on searching for the root error. I assume it's related to the Apache2 server, but how could that be?

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• Running rsync on network connect

  I have one mac which is always on and is my main computer. I also have a MacBook and I'm trying to Sync my iphoto library. So I can successfully use rsync to sync files. I'm using a cron to have it run once a day. In reality the macbook isn't always on, so I'm looking for a way to run rsync when ever the two computers are connected on the same wifi network. So I'm guessing the best place is to somehow run rsync when the airport is connected. Whats the best way

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• Running rsync on network connect

  - by user40495

  I have one mac which is always on and is my main computer. I also have a MacBook and I'm trying to Sync my iphoto library. So I can successfully use rsync to sync files. I'm using a cron to have it run once a day. In reality the macbook isn't always on, so I'm looking for a way to run rsync when ever the two computers are connected on the same wifi network. So I'm guessing the best place is to somehow run rsync when the airport is connected. Whats the best way

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• Exchange 2003 HTTP Account Error

  - by Ryaner

  We are trying to get one of our users connected to our Exchange 2003 server using the HTTP method as they already have an existing Exchange account on another server. The setup goes through and they appear to get connected fine however none of the subfolders are listed. Instead we get one folder of "Error-Pls file a Bug". The usual Google search just throws up nothing useful. Does anyone know how to fix this? Or has anyone actually gotten Outlook (2003 or 2007) to connect to an Exchange 2003 server?

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• No dialogues can be heard in a movie with a 5.1 audio

  - by Karthikeyan KC

  I recently purchased 'PHILIPS DSP56U' 5.l multimedia system and got it connected with my laptop. All the speakers are connected good and all the channels responded well for the test sounds. The stereo music tracks and other normal movies (stereo) plays good. I'm having a problem with playing a movie with a 5.1 audio track. I can hear the background soundtrack, weapon effects, but I cannot hear the dialogues (which I assume to be a separate track). I'm using VLC to play the movie and it would be grateful if someone help me through this :)

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• Why does unpartitioned Hitachi HDS5C3020 drive start consuming 50% more power 15 minutes after boot?

  - by Pro Backup

  In a Debian 6.0.6 system there are 74 pieces of 2TB Toshiba DT01ABA200 drives. These drives are identified as Hitachi HDS5C3020BLE630 drives running firmware revision MZ4OAAB0. 64 Drives attached via HP SAS expander cards to an LSI 2008 SAS controller, another 5 drives are connected directly to the mainboard, 4 drives are connected to a Sil based PCI controller and last 1 drive is only powered and has no data cable connected. The controller LSI and Sil card's their onboard BIOS are both disabled and the mpt2sas and sata_sil modules are removed from the Linux debian 2.6.32-5-amd64 #1 SMP Sun Sep 23 10:07:46 UTC 2012 x86_64 GNU/Linux kernel. The mpt2sas module is loaded after boot using a modprobe command in /etc/rc.local. These 74 drives are not partitioned, neither formatted and also not mounted. The system consumes: with 0 drives: 70.6 - 70.9 Watt (also 15 minutes after boot); with 74 drives: 330 - 360 Watt, just after boot (is equivalent to 3.5 - 3.9W per drive in idle state); with 74 drives: 420 - 466 Watt, each time in the 15th minute of uptime (is equivalent to 4.7 - 5.3W per drive in idle state). The drive specification lists 4.7W as read/write, and 3.3W as idle power consumption. The increased power consumption is most likely on the 5V line, because after roughly 1 minute an "over current protection" (OCP) of the power supply (PSU) shuts down the power. The used PSU is a single rail model with an OCP of 122A on the 12V line and 55A on the 5V line. Regression: It doesn't matter whether the drive its APM value is set to disabled or 1 (maximum power saving). The operating system records no read/write activity in /proc/diskstats. The values there are identical (28 read, 0 write operations) as immediately after the modprobe operation. Can't test what happens when booting into the mainboard it's BIOS - to exclude any OS intervention - because the Super Micro X8SI6-F mainboard running firmware 06/27/12 has a bug that incorrectly reads a +74.0 C CPU sensor temperature as "High" in BIOS mode, and shuts down the power after 1 minute. What might be causing the drive read/write activity on all drives in the 15th minute after boot and how to prevent it from happening?

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• Can't turn computer on after re-attaching hard drive

  - by julie

  I have an Eee PC 1008HA. A few days before I got a virus that was preventing the Windows to boot but I could turn the computer on. I opened (disassembled) the Eee PC, then disconnected the hard disk. I connected the hard disk to another computer and copied my files. When I connected again the hard disk to my Eee PC and closed (assembled) it , I cannot turn the Eee PC on. Even when I connect the wire for charging, neither the charging light nor any other lights light up.

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• Can't find synergy config file on Windows

  - by Joel Avery

  New to synergy I connected everything just fine. Both my Windows 7 64bit (server) and 7 32 bit (client) are connected perfectly. However, I can't tell synergy which screen is where because I can't find this config file everyone is talking about. I looked in the root folder of the application, there is no ext/synergy.conf so I went and made one but that isn't working either. Kind of frustrating cause I think its the last step. Anyway any help is much appreciated. I have the newest version from the site but it says version unknown in the application. On Windows it has that cool drag and drop UI to place your screens where you want them but nothing is working for my mouse or keyboard.

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• Why is mount -a not mounting fuse drive properly when executed remotely (via Fabric)?

  - by Jim D

  This is a weird bug and I'm not sure where it's coming from. Here's a quick run down of what I'm doing. I'm trying to mount a FUSE drive to an Amazon EC2 instance running Ubuntu 10.10 using s3fs (FUSE over Amazon). s3fs is compiled from source according to the instructions etc. I've also added an entry to /etc/fstab so that the drive mounts on boot. Here's what /etc/fstab looks like: # /etc/fstab: static file system information. # <file system> <mount point> <type> <options> <dump> <pass> proc /proc proc nodev,noexec,nosuid 0 0 LABEL=uec-rootfs / ext4 defaults 0 0 /dev/sda2 /mnt auto defaults,nobootwait,comment=cloudconfig 0 2 /dev/sda3 none swap sw,comment=cloudconfig 0 0 s3fs#mybucket /mnt/s3/mybucket fuse default_acl=public-read,use_cache=/tmp,allow_other 0 0 So the good news is that this works fine. On reboot the connection mounts correctly. I can also do: $ sudo umount /mnt/s3/mybucket $ sudo mount -a $ mountpoint /mnt/s3/mybucket /mnt/s3/mybucket is a mountpoint Great, right? Well here's the problem. I'm using Fabric to automate the process of building and managing this instance. I noticed I was getting this error message when using Fabric to build s3fs and set up the mount process: mountpoint: /mnt/s3/mybucket: Transport endpoint is not connected I isolated it down the the problem and built a fabric task that reproduces the problem: def remount_s3fs(): sudo("mount -a") Which does: [ec2-xx-xx-xx-xx.compute-1.amazonaws.com] Executing task 'remount_s3fs' [ec2-xx-xx-xx-xx.compute-1.amazonaws.com] sudo: mount -a [And yes, I was sure to unmount it before running this task.] When I check the mount using mountpoint I get: $ mountpoint /mnt/s3/mybucket mountpoint: /mnt/s3/mybucket: Transport endpoint is not connected Done. But if I run sudo mount -a at the command line, it works. Hrm. Here is that fab task output again, this time in full debug mode: [ec2-xx-xx-xx-xx.compute-1.amazonaws.com] Executing task 'remount_s3fs' [ec2-xx-xx-xx-xx.compute-1.amazonaws.com] sudo: sudo -S -p 'sudo password:' /bin/bash -l -c "mount -a" Again, I get that transport endpoint not connected error. I've also tried copying and pasting the exact command run into my ssh session (i.e. sudo -S -p 'sudo password:' /bin/bash -l -c "mount -a") and it works fine. So...that's my problem. Any ideas?

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• Connecting to local Sql server 2005 through Internet

  - by Manish

  Hello My Sql server is on Local Machine, I want to access it through Internet. I Configure Surace manager and Configuration manager of sqlserver 2005 for remote access. My sqlserver is running on port:1433 I am using port forwarding , I can access service of other ports, My Connetion String Is: Data Source=190.190.200.100,1433;Network Library=DBMSSOCN;Initial Catalog=myDataBase;User ID=myUsername;Password=myPassword; But it gives following error when i am trying to connect sql server through internet: A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: TCP Provider, error: 0 - A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.)

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• Can't bring NAT to work

  - by user31738

  Hello, I bought a D-link DIR-300 wireless router and i can't bring NAT to work, i have an ssh and http service i need to forward to the internet. My connection is as follows: I have an ADSL connection, i'm using a ADSL ethernet modem connected and working, it doesnt let me put it on bridge mode. I have my router connected to my adsl modem through ethernet, it gets its ip through DHCP (and i'ts always the same) I have a desktop computer running linux with apache and openssh configured and working, it has fixed ip. I configured the NAT in the modem forwarding port 22 from the router ip to the internet. In the router i setup NAT forwarding port 22 from the desktop computer fixed ip to out there. This setup already worked with a fonera i had before, can anyone help me with this or tell me what kind of tests do i need to do? How can i test if the router is forwarding ports correctly before the modem?

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• Domain Computers Not Listed In Network

  - by Giawa

  Our network computers are all connected to a domain, and I can see them if I search the active directory (I can click 'search active directory' and then select 'computers' and then Find Now, and all of the computers will appear). However, the computers are not listed in the network browser on any of our computers (Win XP, Win7, Linux, etc) which are connected to the domain. DC is running Windows Server 2008 (Windows Server Standard) with a configured DNS and DHCP server. All of the IPs on our local network are static IPs, although I can't see how that would make a difference. I can still connect to computers on the network via \\computer_name, but I cannot browse them in 'network' or in 'my network places'. The computer browser service is not started on the DC, but I tried starting that and it had no effect. DC currently has the firewall configured as 'off' to try to debug this problem. Thanks in advance

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• Use wired LAN adapter by default

  - by Frantumn

  I am trying to find out if there's a way to set up network adapters so that if 2 are connected with network and internet access it will choose one over the other. Scenario: I have seen several computers running Windows 7 or Windows 8 where you are connected to a wireless network, working perfectly. Then when you plug in an Ethernet cable, it still shows the network icon in the taskbar as wireless. I would like to have my computer set up so that if there's an Ethernet cable plugged in, it uses that, and not the wireless adapter. 1) Is this possible / How? 2) Why does it stay on wireless over wired when given the option for both?

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• DCHP and Router load testing

  - by John H

  I manage a campground wifi network with an average of 10 - 60 active users. I have encountered issues where the router starts acting flaky (failing to assign DHCP or failing to pass traffic) without any clear warning (low cpu utilization, etc). I upgraded the router a couple times and ended up with a Netgear ProSafe VPN router that seems to be handling the traffic. The interesting thing is that the Netgear has lower specs than the Buffalo router it replaced, indicating the issue is with the DD-WRT firmware. While I'll be pursuing this issue on the dd-wrt forums, I need a way to test routers. My vision is having 1-2 computers connected on the LAN side and 1-2 computers connected on the WAN side. I want the LAN computers to be generating various type of traffic and connections, as well as requesting DCHP addresses. A few notes: The wireless aspect should be a non-issue. Most clients would connect to a wireless bridge and come into the router through a network cable. I had a monitoring server with Nagios running check_dhcp against the router. This server was connected directly by a network cable, eliminating wifi bridges and other devices from the equation. This question is somewhat related, but not exactly: Load testing wireless LANs I am going to look at IxChariot. While I'd ideally like to use a 1 computer on each side running Linux and preferably free software, I can entertain running Windows, multiple computers, or non-free software. Total bandwidth doesn't seem to be the issue. I can transfer large files all day. Even on the busiest days, the users seemed to only pull ~5Mbps. There is very little "LAN to LAN traffic" and most of it might never have reached the main router. The issue I need to test for seems to be tied to active users, or more appropriately, active sessions. I know active users or active clients is a meaningless term from a router standpoint and wouldn't mind having more appropriate terms to use. Summary: I need a way to test a routers ability in handling traffic from a large number of clients. My current strategy is to purchase a router, deploy it, and see how it fails in the live environment.

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• How can I enable anonymous access to a Samba share under ADS security mode?

  - by hemp

  I'm trying to enable anonymous access to a single service in my Samba config. Authorized user access is working perfectly, but when I attempt a no-password connection, I get this message: Anonymous login successful Domain=[...] OS=[Unix] Server=[Samba 3.3.8-0.51.el5] tree connect failed: NT_STATUS_LOGON_FAILURE The message log shows this error: ... smbd[21262]: [2010/05/24 21:26:39, 0] smbd/service.c:make_connection_snum(1004) ... smbd[21262]: Can't become connected user! The smb.conf is configured thusly: [global] security = ads obey pam restrictions = Yes winbind enum users = Yes winbind enum groups = Yes winbind use default domain = true valid users = "@domain admins", "@domain users" guest account = nobody map to guest = Bad User [evilshare] path = /evil/share guest ok = yes read only = No browseable = No Given that I have 'map to guest = Bad User' and 'guest ok' specified, I don't understand why it is trying to "become connected user". Should it not be trying to "become guest user"?

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• Wired and wireless conections: force Windows to connect to laptop through Ethernet?

  - by danielkza

  I have a desktop connected to the internet and to my home network through Wi-Fi, and a latptop connected to said desktop through an Ethernet cable. But Windows seems to only reach the laptop through Wi-Fi: I want to transfer files through the wired connection instead. Setting up Internet Connectin Sharing and disconnecting the laptop from Wi-Fi altogether doesn't seem like the most elegant solution to me. I also thought about going to the hosts file and setting up the IP address manually, but that would make the laptop completely unavailable if it's not wired, which happens quite often unfortunately. Is there any way for me to tell Windows to use the wired connection for a particular host if possible, and fallback to any other route it finds otherwise?

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• Facebook doesn't work on computer, but work on mobile device, both use the same router

  - by sasa

  I have a very strange problem and I'm thinking that can be problem with dns or something similar, but not sure and don't know how to solve. My computer is connected to router and every site works fine except facebook (Chrome and Firefox). Chrome shows "Error 101 (net::ERR_CONNECTION_RESET): The connection was reset." But, on mobile device witch is connected to the same router facebook works fine (Fb application and Delphin browser). Pinging facebook works fine. Clearing cookies and cache didn't help. Also, I performed antivirus and antimalware scan and there is nothing. What can be a problem? Update: I'm also connect notebook on that wifi router, and on it works fine. nslookup facebook.com Server: UnKnown Address: 192.168.1.1 Non-authoritative answer: Name: facebook.com Addresses: 2a03:2880:2110:3f01:face:b00c:: 2a03:2880:10:1f02:face:b00c:0:25 2a03:2880:10:8f01:face:b00c:0:25 69.171.224.37 69.171.229.11 69.171.242.11 66.220.149.11 66.220.158.11

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