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• No Outbound Internet on Windows Home Server

  - by Kyle B.

  Could someone provide some steps for me to check my internet connection on my Windows Home Server? It seems to have intermittent connectivity issues and I am unsure of how to diagnose the problem because it is a headless (no monitor, no keyboard) machine so the only way to get to the device is via remote desktop (which works fine). When connected to the machine, it doesn't pull up any microsoft.com sites and some other sites it does pull up (i.e. gmail.com) and some it doesn't (stackoverflow.com). To make matters more complicated, it has worked intermittently in the past for reasons unknown. Are there tools I can use to properly diagnose the reason for the connection failure? I can ping 127.0.0.1 just fine, I have internet working on my other router-connected machines, so I'm not sure why this one would fail. Any suggestions would be much appreciated and up-voted :) ** edit - thanks for suggestions guys, I'm going to try these tonight and will update my post. ** edit #2 - I hoping this is a more permanant fix, but I have both changed my port on the router as well as restarted the router at the same time. The internet (for the moment) appears to be working. I will be sure to try everything we have discussed should this problem persist. Thanks, Kyle

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• SQL Server 2008 Remote Access

  - by Timothy Strimple

  I'm having problems connecting to my SQL Server 2008 database from my computer. I have enabled remote connections as described in this answer (http://serverfault.com/questions/7798/how-to-enable-remote-connections-for-sql-server-2008). And I have added the ports listed on the microsoft support page to our Cisco Asa firewall and I'm still unable to connect. The error I'm getting from the SQL Management Studio is: 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.) (Microsoft SQL Server, Error: 10060) Once again, I have double and triple checked that remote connections are enabled under the database properties and that TCP is enabled on the configuration page. I've added tcp ports 135, 1433, 1434, 2382, 2383, and 4022 as well as udp 1434 to the firewall. I've also checked to make sure that 1433 is the static port that is set in the tcp section of the database server configuration. The ports should be configured correctly in the firewall since http/https and rdp are all working and the sql server ports are setup the same way. What am I missing here? Any help you could offer would be greatly appreciated. Edit: I can connect to the server via TCP on the internal network. The servers are colocated in a datacenter and I can connect from my production box to my development box and vice versa. To me that indicates a firewall issue, but I've no idea what else to open. I've even tried allowing all tcp ports to that server without success.

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• Toshiba Qosmio: Battery Stuck at 60%, does not Charges, PC can't power up, can't remain on with out

  - by Fellknight

  Just like the tittle says, now let me try to give some more detail about the symptoms; The battery is stuck at 60 percent (68% at the moment of this writing).When hovering over the battery icon in Windows 7 Home Premium x64 it reads:"68% available (plugged in, charging)", there's no x or any sing the OS is displaying any error. No matter how much time left connected to the AC adapter the battery doesn't charge, it seems however it continues to discharge at its normal rate when disconnected from the laptop (about 1% each 2 weeks). Now this last symptom is the one i find most strange it "seems" the laptop somehow isn't recognizing the battery because even with the remaining charge of 60%(ish) the laptop wont power up or remain on if disconnected from its AC adapter(if it's on and is unplugged it will immediately turn off). Meaning that even with the battery attached correctly in its right place is as if running the laptop with no battery at all. Toshiba's Utilities haven't detected anything strange (or anything for that matter) with the battery or the hardware. The laptop when in use is connected 90% of the time to a Belkin surge protector (like my 1TB EHD). The protector is working correctly (green light on) and the 1TB HD too, thus a power surge having damaged it's very unlikely. Thnx in advance

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• Why is my RapidSSL Certificate chain is not trusted on ubuntu?

  - by olouv

  I have a website that works perfectly with Chrome & other browser but i get some errors with PHP in CLI mode so i'm investigating it, running this: openssl s_client -showcerts -verify 32 -connect dev.carlipa-online.com:443 Quite suprisingly my HTTPS appears untrusted with a Verify return code: 27 (certificate not trusted) Here is the raw output : verify depth is 32 CONNECTED(00000003) depth=2 C = US, O = GeoTrust Inc., CN = GeoTrust Global CA verify error:num=20:unable to get local issuer certificate verify return:1 depth=2 C = US, O = GeoTrust Inc., CN = GeoTrust Global CA verify error:num=27:certificate not trusted verify return:1 depth=1 C = US, O = "GeoTrust, Inc.", CN = RapidSSL CA verify return:1 depth=0 serialNumber = khKDXfnS0WtB8DgV0CAdsmWrXl-Ia9wZ, C = FR, O = *.carlipa-online.com, OU = GT44535187, OU = See www.rapidssl.com/resources/cps (c)12, OU = Domain Control Validated - RapidSSL(R), CN = *.carlipa-online.com verify return:1 So GeoTrust Global CA appears to be not trusted on the system (Ubuntu 11.10). Added Equifax_Secure_CA to try to solve this... But i get in this case Verify return code: 19 (self signed certificate in certificate chain) ! Raw output : verify depth is 32 CONNECTED(00000003) depth=3 C = US, O = Equifax, OU = Equifax Secure Certificate Authority verify error:num=19:self signed certificate in certificate chain verify return:1 depth=3 C = US, O = Equifax, OU = Equifax Secure Certificate Authority verify return:1 depth=2 C = US, O = GeoTrust Inc., CN = GeoTrust Global CA verify return:1 depth=1 C = US, O = "GeoTrust, Inc.", CN = RapidSSL CA verify return:1 depth=0 serialNumber = khKDXfnS0WtB8DgV0CAdsmWrXl-Ia9wZ, C = FR, O = *.carlipa-online.com, OU = GT44535187, OU = See www.rapidssl.com/resources/cps (c)12, OU = Domain Control Validated - RapidSSL(R), CN = *.carlipa-online.com verify return:1 Edit Looks like my server does not trust/provide the Equifax Root CA, however i do correctly have the file in /usr/share/ca-certificates/mozilla/Equifax...

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• Can't connect two PCs to a Network Switch at the same time (Windows 7)

  - by puk

  I have two computers connected to a network switch and every once in a while one of the computers will lose its internet connection. It's almost always the same computer every time. However, if I play around with the control panel, I can switch it, so that now the other computer is not connected. Restarting either of the computers does not help either. In Windows, the worlds-greatest-trouble-shooter tells me that a network cable is unplugged and that I should try plugging it in...Disabling and re-enabling my NIC does not fix this problem, neither does swapping cables around. When rebooting, the BIOS complains about how the Ethernet Cable is not plugged in. If it's in any way important, My set up at the office is like so: Modem - Routher - Network Switch 1 - Network Switch 2. I have tried turning off the energy saving option for my NIC, and I tried manually setting the link-speed to 100Mbps Full Duplex without any luck. Also, I have a Realtek PCIe GBE Family controller on both computers Does anyone have any idea why this is happening every 5-10 days? EDIT: I have also tried using a completely different Network Switch and the problem still persists as before.

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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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• iSCSI SAN Implementation with several ESXi hosts and two Equallogic SANs

  - by Sergey

  I work for a small state college. We currently have 4 ESXi hosts (all made by Dell), 2 EqualLogic SANs (PS4000 and PS4100) and a bunch of old HP Procurve switches. The current setup is very far from being redundant and fast so we want to improve it. I read several threads but get even more confused. The Procurve Switches are 2824. I know they don't support Jumbo Frames and Flow Control at the same time, but we have plans to upgrade to something like Procurve 3500yl. Any suggestions? I heard Dell Powerconnects 6xxx are pretty good but I'm not sure how they compare to HPs. There will be a 4-port Etherchannel (Link Aggregation) between the switches, and all control modules on SAN will be connected to different switches. Is there anything that will make the setup better? Are there better switches then Procurves 3500yl that cost less than 5k? What kind of bandwidth can I expect between ESXi hosts (they will also be connected to 2824 with multiple cables) and SANs?

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• Why can I not access the internet when Windows 7 finds no issue with the ethernet connection and the network can see my device?

  - by WannabeCoder

  So I just moved from a house to an apartment. In the house and the apartment I had Uverse set up - and in both I had my desktop connected via a ~40 foot long cat5 cable. However, upon moving to the apartment I found that my ethernet connection no longer provides internet. This would seem like a mundane problem if not for: The router can see the computer on the network Windows 7 (the desktop's OS) detects no problems with the ethernet connection. Connections over the internet (i.e. browser windows, Pandora, etc.) do not immediately fail. Instead they load for 2 minutes and then finally give up. Devices connected over the Wifi (PS4, Laptop) access the internet just fine While removing the cat5 cable from my house, I accidentally damaged the locking tab but managed to bend it back into the appropriate position. I would suspect that a bad cat5 cable might be to blame if not for the above issues (thought I've heard bad cat5 cables cause the most nonsensical problems) and the fact that I tested the cat5 cable by having it share internet between my laptop (working internet) to my desktop and it functioned just fine and provided the desktop with internet. My ipconfig /all successfully finds a default gateway, DHCP server, and DNS server. What could possibly be causing the problem?

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• charging light on in laptop with battery removed.

  - by Jus12

  I hope this is the right place for this question. I have an LG R310 laptop. Recently the adapter connector started playing up, so I got a second hand replacement adapter of the same rating. The adapter was a cheap type (I know I made a mistake) and faulty.. it made a low buzzing sound when plugged in and not connected to the laptop. It didn't make the noise when connected to the laptop. Foolishly I used this adapter for several weeks. One day the adapter stopped working. The led didnt work and it was not charging. It had also drained the laptop's battery to 0%. I then got an original replacement adapter. Now I can use the laptop on power but the battery does not charge. The charging light does not come on. The interesting thing is that when I remove the battery the charging light comes on and stays on after I insert the battery back (the battery still does not charge). I need to know if the faulty adapter damaged the motherboard or if its just a problem with the battery. I have a multimeter and I prefer not to open the laptop. Thanks in advance.

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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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• Network Traffic Log

  - by Chris Becke

  Background - On my "home" network I have a Linksys WTR45GL router providing my internet access as well as a wireless AP. Connected I have * 2 Windows PCs (wired) * At least one laptop (Wired) * Some 802.11 enabled handheld consoles (PSPs) * A Nintendo Wii * Some windows XP pcs used by the people in the granny flat. Where I live, South Africa, well, 1Gb worth of monthly cap is, while not expensive, costly enough that I'd like to be sure that all the bandwidth used by devices on my network is ... well ... legitimate and not the result of neighbors parasiting my wireless, malware or just the result of "liberal" download policies in my software. I got the Linksys WRT45GL on the understanding that there were custom firmwares (DD-WRT and Tomato) that allowed bandwidth tracking, but there doesn't seem to be any facility to get a log of traffic that can be examined to see (a) which local devices were the biggest consumers of bandwidth and (b) what they were connected to. What tools are there for logging traffic such that, when it gets to that OMG moment in the month when all my bandwidth is gone, I have a chance to find out what the hell used it all up (and hopefully attempt some corrective action).

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• What is the correct iptables rule when NATing multiple private subnets?

  - by Jose Mendez

  I have a Centos minimal 6.5 acting as a router. eth0 is connected to a Cisco switch trunk port, allowing VLANs 200-213. I have several VLAN interfaces just as this link suggests: https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Deployment_Guide/s2-networkscripts-interfaces_802.1q-vlan-tagging.html And have IPv4 forwarding, so all my network devices from any of the networks 200-213 can communicate with each other using this linux box as their router. Problem is, I need them to access the Internet, so I added the following rule: iptables -t nat -A POSTROUTING -s 192.168.0.0/16 -j SNAT --to 1.1.1.56 1.1.1.56 is the "outside" address. This works fine, devices connected to the internal networks can ping Intertnet addresses BUT, they stop being able to talk to each other across subnets, so 192.168.211.55 can ping 8.8.8.8, but can't talk to 192.168.213.5. As soon as I do a service iptables restart to remove the rule, I can start talking across internal subnets again. What would be the correct way to set up NAT for multiple private subnets? Or maybe the correct way to set up forwarding?

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• Why would Windows use slower network interface despite route metrics?

  - by tim11g

  On my previous notebook, the Dell/Broadcom wireless adapter had an option to automatically disable wireless when a wired network is connected, so I never dealt with multiple active interfaces. My current system has an Intel wireless adapter, and they apparently haven't figured out how to turn it off when there is a wired connection. Unless I explicitly remember to disable wireless when docked, the connection is active. That shouldn't be a problem (in theory), since the route metric will cause traffic to go over the fastest network (as indicated by the lowest metric in the routing table). Apparently not - I'm running a backup and seeing the throughput at 25Mbps or so (which is consistent with 802.11g) when a perfectly good Gigabit Ethernet interface is also connected. IPv4 Route Table =========================================================================== Active Routes: Network Destination Netmask Gateway Interface Metric 0.0.0.0 0.0.0.0 192.168.1.254 192.168.1.104 10 0.0.0.0 0.0.0.0 192.168.1.254 192.168.1.109 25 127.0.0.0 255.0.0.0 On-link 127.0.0.1 306 127.0.0.1 255.255.255.255 On-link 127.0.0.1 306 127.255.255.255 255.255.255.255 On-link 127.0.0.1 306 Windows has correctly identified the Ethernet interface (.104) and assigned it the lower (preferred) metric. So the Ethernet interface should be used exclusively, right? Why is the Ethernet connection not being used? What other factors are involved? (This is with Windows 7 if it makes a difference)

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• How to wire 20 computers and 20 phones and 1 server into LAN?

  - by John Smith

  I have currently 3 switches Two Netgear JFS524 with 24 slots, One Belkin with 16 slots. Server DSL Internet Router. Main question is how to connect switches together, two Netgear's are next to each other, yet one is about 100 feet away and holds about 5 computer and 5 phones. If i connect them with only 1 wire will that limit bandwidth? e.g. all 23 computers will be limited to speed of one CAT5e cable? If i connect switches with 2 cables will this give speed boost? What's the ideal scenario should i just move the third switch next to other two? Will the speed of computer connected to white switch be same as computer connected to top switch? Will moving white switch right next top switch and having 16 wires comming 100 feet instead of 1 wire comming 100 feet make it faster? EDIT 1: I actually have NETGEAR ProSafe GS105 Gigabit switch its only has 4 ports in it though, you think i can have use of it in current setup? Like connect all 3 switches and server into it and keep internet router and phone server on one of the slower switches EDIT 2: Everyone mention gigabit switches, but will they do any difference with 10/100 network cards? I then have to use gigabit cards in every computer too? I could in server perhaps, but users will be 10/100

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• is it worth to use load balancer on web server/website

  - by user427969

  I have a website and a while ago, the web server of the company hosting my website was down for about a day. I consulted the company for a solution on how i can stop this from happening in future and they suggested to have a second machine and which will be connected to my current website/web server by a "load balancer" (at an additional huge cost!!!). The second machine will be replicate of the first one and so if i goes down, the other will always be running. ---- Explanation ----- My hosting company suggested that it will be a good idea to have a second machine running at the same time and both the machines will be connected by a load balancer which reduces the rist of a downtime. The second machine will be a mirror of the first and any changes to first must be replicated in the second. I don't mind spending money if it really saves my website from going down. I want to know is it worth having this "load balancer" for my purpose? My website is a 24/7 service. I cannot afford an outage of 24 hours/1 hour. I don't mind using this "load balancer" as far as it is really worth. I am not sure if its just a marketing trick of my hosting company or really a "best" solution Thanks for help. Regards

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• Networking problems in VMWare with wireless bridge

  - by Robert Koritnik

  Barebone data: virtualization: VMWare Workstation 6.5 (latest) Host: Windows Server 2008 x64 Guest: Windows Server 2008 x86 Host network adapter: wireless Guest network adapter 1: over Bridge VMNet (automatic) Guest network adapter 2: over Host only VMNet Problem When I surf the net within VM my internet connection just gets stalled (not dropped). It doesn't experience any timeout whatsoever, it just stops downloading/communicating. For instance: I start downloading a file with a browser (IE/FF/CR doesn't matter) and I have to pause/restart download when speed drops to 0. I could wait indefinitelly but connection won't pickup automatically. What did I miss in my network configuration? Update 1 I've tested this in various combinations. This works fine when host is connected via Ethernet. But when connected via Wifi, the connection on the guest works as previously described. It connects fine. It gets a valid IP from DHCP... Everything is cool as long as you don't start doing some intensive network traffic (ie. download a 2MB file) In this case it starts downloading and stops after a while. Speed just drops to 0B/s... Sometimes it picks up back, sometimes it doesn't. Connection still stays and works. I can ping around with no problem.

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• Automatically install driver on headless WHSv1 system

  - by Dan Neely

  I have one of the HP Mediasmart Windows Home Server v1 boxes. It's network port appears to have died a few days ago but the system is not giving any other sign of failure: No activity lights activate on either side of the cable when connected to my gigabit switch; when connected to one of my routers 100 megabit ports the lights turn on but it remains unreachable over the network and my router never lists it as among DHCP clients. I bought a USB-ethernet adapter to temporarily get it back online; but the adapter needs a driver to work which I can't install because the system is headless by design (no video out, no PCI/PCIe slots) with admin access only available via the WHS client or remote desktop. Both of those options require network connectivity and are consequently unavailable. I tried copying the drivers to a flash drive; but Windows either didn't look there or none of the drivers provided were suitable (Win8, Win7, or combined XP and Vista). I've been told that a USB WiFi adapter would have the same driver problem.

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• Problem linking two Cisco routers with a static route

  - by Chris Kaczor

  I'm trying to link two Cisco routers with a static route and I haven't been able to get it working as expected. Here is the basic setup: Router 1 - WRV210 - 192.168.1.1 - connected to cable modem Router 2 - RV120W - 192.168.2.1 I already have several machines on Router 1 that are working and I want to setup Router 2 with a few other machines on the different subnet. Here is what I've configured: Connected the WAN port on Router 2 to a LAN port on Router 1 Configured Router 1 to give 192.168.1.2 to Router 2 via DHCP Configured Router 1 with a static route (192.168.2.0 mask 255.255.255.0) to 192.168.1.2 using the LAN & Wireless interface Disabled the firewall on Router 2 (since it is covered by Router 1) Configured Router 2 to "Router" mode instead of "NAT" mode Configured Router 2 with a static route (192.168.1.0 mask 255.255.255.0) to 192.168.1.1 using the WAN interface From the research I've done I think that should be enough but things aren't working exactly as expected: Router 2 can ping 192.168.1.1 and 192.168.1.101 (a machine on router 1) A machine on Router 2 can ping 192.168.1.1 and 192.168.1.101 (a machine on router 1) ping 192.168.1.1 and 192.168.1.101 (a machine on router 1) Router 1 can NOT ping 192.168.2.1 or 192.168.2.101 (a machine on router 2) A machine on Router 1 can NOT ping 192.168.2.1 or 192.168.2.101 (a machine on router 2) can NOT ping 192.168.2.1 or 192.168.2.101 (a machine on router 2) Router 1 and a machine on Router 1 can ping 192.168.1.2 (Router 2 itself) I'm confused as to why Router 1 cannot talk to the 192.168.2.0/255.255.255.0 subnet. Any help would be greatly appreciated.

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• Data recovery on a data HDD (no OS)

  - by aCuria

  I am helping a family member with a dead hard disk. It is a seagate 200Gb 3.5" HDD in one of those old-school external enclosures. The problem was that windows failed to detect the hard disk when plugged in through USB. I removed the hard disk from its enclosure, and plugged it into my desktop PC. The BIOS does detect it upon POST, but unfortunately windows 7 would refuse to boot. It will get stuck on the loading screen with the glowing windows logo. Safe mode doesn't help either. What options do I have before going for some professional data recovery? edit: Someone modified the Title to something completely different from what I was asking, i just changed it back. 1) 2 HDD drives, DiskA(Dead), DiskB(my OS disk) 2) when B is connected to my system, everything works fine 3) when A AND B is connected, failure to boot. POSTs fine, but windows wont load 4) A has NO OS, its PURE data. It came from an EXTERNAL HDD enclosure which doesnt belong to me, and im trying to do data recovery.

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• DNS Does Not Register at Off-site Locations

  - by Russ Warren

  First of all, let me give you the specifics of our setup: Windows Small Business Server 2008 Domain w/ all applicable updates on the DC The DC does DHCP for the main site The DC does DNS for all sites 3 sites including our headquarters where the DC is located All sites are connected through OpenVPN SSL tunnels terminated by an Untangle box at each site The 2 remote sites us the Untangle box as a DHCP server for their subnet, which assigns the DC as the primary DNS server Collection of Windows XP and Windows 7 workstations connected to the domain Here's the issue: All of the workstations at the main site register with the DNS server on the domain controller fine. As they grab an IP from the DHCP server, it updates the DNS server with the new host record. I have 2 systems (each at different remote sites) that fail to register with the DNS server. I've attempted the following troubleshooting steps: Confirmed the network adapter is using the DC as a DNS server Confirmed 2-way traffic is possible between DC and workstation Verified the "Register with DNS server" setting was checked in the adapter properties Attempted ipconfig /registerdns and received no errors For the time being, I have setup a DHCP reservation for these systems and manually created a host record. This seems to work fine, but I need a solution for any new systems that go out there.

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• DHCP Server on local machine

  - by EralpB

  Hello I am trying to setup a dhcp3-server on Ubuntu. But my question is more generic, if dhcp server is in a blockbox and all clients are connected to it I think I get what is going on but when dhcp server is installed on one of the "clients" that confuses me. When I send a dhcp packet from that client to the dhcp server, will my ethernet card read and write at the same time? Or will it handle it internally without writing any data to ethernet cable. It's the first time I am encountering these network things so I am a little bit confused. Also I wonder If I am in a big network with lan IP let's say 192.168.0.100 and I install a dhcp server to my computer, can any other computers accidentally get IP from my dhcp server? Every computer has one ethernet card (if that matters?). And every computer is connected to one router. I guess the answer is no because the broadcast message won't reach to my computer since when router receives a dhcp search packet it will answer and it won't let other computers know about it because they don't need to. And without router sending that packet one by one, it cannot travel further. I'd be glad if someone enlightens me. Thank you very much.

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• How do I make dnsmasq serve IP addresses via IPoIB?

  - by Matt

  I have a cluster farm that I'm setting up. The nodes (computers in the farm) are connected via ethernet & IP over Infiniband. I'm needing to netboot the nodes and thought dnsmasq would fit well as it provides all the features including support for DHCP over IB and it works great for our ethernet setup. However, I can't seem to get it to provide IP addresses to the infiniband adaptors on the nodes. Each node is running an Ubuntu desktop 12.04 LTS. The dnsmasq server is running on ubuntu server 12.04LTS and has the following test config: dhcp-authoritative domain-needed bogus-priv expand-hosts no-hosts domain=local dhcp-range=eth0,10.0.0.10,10.0.0.255,12h dhcp-option=eth0,3,10.0.0.1 dhcp-range=ib0,10.1.1.10,10.1.1.255,12h dhcp-option=ib0,3,10.1.1.1 log-queries log-dhcp IPoIB works between nodes when configured statically but not with dhcp. On the nodes the file /etc/network/interfaces contains auto lo iface lo inet loopback auto ib0 iface ib0 inet dhcp #iface ib0 inet static #address 10.1.1.5 #netmask 255.0.0.0 up echo connected >`find /sys -name mode | grep ib0` Is there something I need to do on the client or server end to make this work?

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• Having trouble setting up my router

  - by indyK1ng

  I just moved into my apartment and the Internet connection is working. It's Comcast in case that matters. Anyway, I'm having trouble setting up my wireless router (Netgear WNR2000) to work with it. Are there any settings that I could be missing? I currently have it set up to use a static IP address and I found the DNS servers I'm supposed to use and the Internet light is green, but I can't get out to the Internet. When I am trying, I'm connecting to an Ethernet port on the back of my router. Is there a setting I'm missing or a setting that I have set wrong? I used the automatic set up wizard to learn that it's a static IP address. Any help would be appreciated. I am currently only able to use my Linux machine, so please make any help in Linux commands. Yes, I can connect to the Internet if I connect to the modem directly and I've been using the web interface when I'm connected to the router, so I suppose I can ping the router. My router detected the connection as using a static IP address, so I connected to the modem directly and figured out what my IP address, gateway, and mask were as well as DNS servers.

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• Connection Issue

  - by Karl Schneider

  Desktop computer, connected directly into a Comcast modem. Every so often, at seemingly random intervals, my connection will drop. This could be while in the middle of browsing, or when I'm not even at the computer. When the connection drops, the modem still shows 4 green lights. The modem is connected to a splitter (cable and internet in same room), and then directly to the wall. To recover from the problem, I am forced to restart my computer, at which point everything works fine again. I have tried an ipconfig/release and renew, it tells me that it is unable to contact the DHCP server, and thus can't renew. I have updated the NICs driver, no luck. I have changed the ethernet cord, no luck. I have had Comcast replace the modem, no luck. The only thing I can think of that hasn't been replaced is the cords connecting the modem to the wall and the splitter. Can anyone think of anything else I may be able to do to isolate what's causing the issue?

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• New router messed up server 2003 setup...

  - by Aceth

  Hey, We were sent a new 2wire router today configured it as best we can to match the old bt voyager. We've also got X static IP's. We've manage to get our webserver on one of the new IP's public facing. then we use a hardware firewall which is in a DMZ again with a different static IP. This firewall then is our gateway for our internal LAN. with a few servers etc. The problem we're having is only our PDC (primary Domain controller which has exchange 2003 on) can't ping externally even an external IP. We've connected laptops to the 2wire router and obtain a private ip 192.168.1.X and it works fine can ping etc. our other servers with an internal ip behind the firewall can ping out fine. We've connected to the firewalls logging console and the pings from the server are allowed through so its fine there. The server in question is a Windows server 2003 R2 Enterprise SP2 + Exchange 2003 Server doesn't have firewall turned on. it has static private IP .. gateway is pointing to the right one External Static IP is routing fine inwards We've ran out of ideas .. help??

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