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• pfSense 2.1 OpenVPN client not using tunnelled interface

  - by Brian M. Hunt

  I'm having some trouble getting OpenVPN working on my pfSense box. The issue is quite strange to me. When I have the OpenVPN turned on, only my router is able to connect to the Internet. From the router I can use ping, links, etc., and connections work exactly as expected - through the VPN, with the IP address assigned by my VPN provider (Proxy.sh, incidentally). However, none of the clients on the local network can connect to the Internet. I get timeouts when using ping or a web browser. I can ping my router, and the IP address of the gateway. When I switch the default gateway from the VPN to my ISP's gateway, all works exactly as expected. Here the routing table (netstat -r) when in VPN mode, and a key for it: IPv4 Destination Gateway Flags Refs Use Mtu Netif Expire 0.0.0.0/1 10.XX.X.53 UGS 0 122 1500 ovpnc1 = default 10.XX.X.53 UGS 0 235 1500 ovpnc1 8.8.8.8 10.XX.X.53 UGHS 0 82 1500 ovpnc1 10.XX.X.1/32 10.11.0.53 UGS 0 0 1500 ovpnc1 10.XX.X.53 link#12 UH 0 0 1500 ovpnc1 10.XX.X.54 link#12 UHS 0 0 16384 lo0 ZZ.XX.XXX.0/20 link#1 U 0 83 1500 re0 ZZ.XX.XXX.XXX link#1 UHS 0 0 16384 lo0 127.0.0.1 link#9 UH 0 12 16384 lo0 128.0.0.0/1 10.11.0.53 UGS 0 123 1500 ovpnc1 192.168.1.0/24 link#11 U 0 1434 1500 ue0 192.168.1.1 link#11 UHS 0 0 16384 lo0 YYY.YYY.YYY.YYY/32 ZZ.XX.XXX.1 UGS 0 249 1500 re0 IP addresses 10.XX.X.53/54 - My DHCP-assigned IP address/pair from the VPN provider ZZ.XX.XXX.XXX - My external IP assigned by my ISP YYY.YYY.YYY.YYY - The external IP assigned by the VPN provider Interfaces ovpnc1 - My VPN client interface re0 - My LAN interface ue0 - My WAN interface This looks essentially what I would expect it to be. The default route is through the VPN provider. The VPN address is routed through the ISP-assigned IP address. I am not sure what would be wrong here. So figuring this was a firewall issue, I basically tried enabling all in/out traffic. This did not seem to remedy the problem. Also figuring it could possibly be some client networking issue, I restarted the clients on the LAN. This did not help. I also ran route flush and reset the routes manually. So I am a bit stumped, and would be very grateful for any thoughts on what the problem might be.

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• How do I protect a low budget network from rogue DHCP servers?

  - by Kenned

  I am helping a friend manage a shared internet connection in an apartment buildling with 80 apartments - 8 stairways with 10 apartments in each. The network is laid out with the internet router at one end of the building, connected to a cheap non-managed 16 port switch in the first stairway where the first 10 apartments are also connected. One port is connected to another 16 port cheapo switch in the next stairway, where those 10 apartments are connected, and so forth. Sort of a daisy chain of switches, with 10 apartments as spokes on each "daisy". The building is a U-shape, approximately 50 x 50 meters, 20 meters high - so from the router to the farthest apartment it’s probably around 200 meters including up-and-down stairways. We have a fair bit of problems with people hooking up wifi-routers the wrong way, creating rogue DHCP servers which interrupt large groups of the users and we wish to solve this problem by making the network smarter (instead of doing a physical unplugging binary search). With my limited networking skills, I see two ways - DHCP-snooping or splitting the entire network into separate VLANS for each apartment. Separate VLANS gives each apartment their own private connection to the router, while DHCP snooping will still allow LAN gaming and file sharing. Will DHCP snooping work with this kind of network topology, or does that rely on the network being in a proper hub-and-spoke-configuration? I am not sure if there are different levels of DHCP snooping - say like expensive Cisco switches will do anything, but inexpensive ones like TP-Link, D-Link or Netgear will only do it in certain topologies? And will basic VLAN support be good enough for this topology? I guess even cheap managed switches can tag traffic from each port with it’s own VLAN tag, but when the next switch in the daisy chain receives the packet on it’s “downlink” port, wouldn’t it strip or replace the VLAN tag with it’s own trunk-tag (or whatever the name is for the backbone traffic). Money is tight, and I don’t think we can afford professional grade Cisco (I have been campaigning for this for years), so I’d love some advice on which solution has the best support on low-end network equipment and if there are some specific models that are recommended? For instance low-end HP switches or even budget brands like TP-Link, D-Link etc. If I have overlooked another way to solve this problem it is due to my lack of knowledge. :)

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• Some sites won't load on Ubuntu/Mint

  - by Or W

  I have a REALLY weird problem with either my network or my OS. Last week I've suddenly had difficulties loading some websites or even more odd some parts of different websites. For example, I could load gmail.com, login and view the list of emails in my inbox but when I clicked one of them it would just time out. Another example is http://www.ynet.co.il, I can view the home page but going into any one of the articles fails (times out). I've tried Chrome, Firefox and Opera, all fail the same way. If I take a URL of a page I cannot load via the browser and try to wget it though the console I get the file just fine. I've formatted my machine (Used to run Ubuntu 13.04) and installed Mint Linux this time, it worked fine for a few days and now, again, having the same exact issues. Important to note that I have other machines connected either directly or via Wi-Fi to the router and they are all working fine (two win7 machines and 1 raspberry pi). Another strange behavior is that I can ftp or ssh to remote machines but cannot send files via ftp (times out) even if I set passive mode ON and when using ssh I can do just about anything but I cannot paste text into the remote machine, for example if I nano a file on the remote machine and try to paste anything from my clipboard it freezes. What I've tried so far: Disable IPv6 on the networking admin (and on firefox disabling ipv6 on the about:config page) Changing the port and the network cable I went to the store and bought a new standalone PCIe network adapter Connected my win7 laptop using the same cable and router port (sites that were not working on my Mint are working just fine on the win7 machine) Loaded Mint from a livecd, got the same result Tried changing the MTU (was 1500, tried 1492) Some observations: When I clear my browser cache and go to facebook.com for example, the homepage loads but I fail to load any profile/group page. If I refresh facebook.com homepage a couple of times it stops and fails to load until I clear my browser cache. I changed the chrome cache folder permissions to 0777 but that did not help. When I run netstat -n I see A LOT of connections that are in 'FIN_WAIT' mode (I'm guessing that's when I try to refresh pages that are not working and timing out), I have no idea what it means or if it helps anyone figure out what's wrong. The sites that are not loading correctly are always that same, they don't vary or anything and they fail to load exactly the same way on all three browsers that I've tried. When I Googled 'Ubuntu some sites not loading' I see a huge amount of complaints just like mine, but none of them that I could find actually says what the problem is or how they fixed it. Technical stuff: netstat -n ps aux netstat -nr

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• unable to join domain using virtualbox

  - by FreshPrinceOfSO

  I'm in the process of setting up a VM environment for a MS certification exam (70-462). Following the training kit's instructions, I've set up a domain controller (DC) and two members (SQL-A, SQL-B) thus far. I can't figure out why I can't join the domain. DC IPv4 Address . . . : 10.10.10.10(Preferred) Subnet Mask. . . . : 255.0.0.0 DNS Servers. . . . : ::1 127.0.0.1 SQL-A IPv4 Address . . . : 10.10.10.20(Preferred) Subnet Mask. . . . : 255.0.0.0 DNS Servers. . . . : 10.10.10.10 SQL-B IPv4 Address . . . : 10.10.10.30(Preferred) Subnet Mask. . . . : 255.0.0.0 DNS Servers. . . . : 10.10.10.10 I've read how to do networking between virtual machines in virtualbox and the documentation. After trying various network adapter configurations, I can't get them to communicate in order to have the two members join the domain. When I ping from .30 to .10, I get: ping 10.10.10.10 Pinging 10.10.10.10 with 32 bytes of data: Reply from 10.10.10.20: Destination host unreachable. Reply from 10.10.10.20: Destination host unreachable. Reply from 10.10.10.20: Destination host unreachable. Reply from 10.10.10.20: Destination host unreachable. Trying to join the domain: netdom join SQL-A /domain:contso.com The specified domain either does not exist or could not be contacted. The command failed to complete successfully. Within VirtualBox, I've tried the following combinations for network adapter: Attached to - Promiscuous Mode ------------------------------- NAT Bridged Adapter - Deny Bridged Adapter - Allow VMs Bridged Adapter - Allow All Internal Network - Deny Internal Network - Allow VMs Internal Network - Allow All Host-only Adapter - Deny Host-only Adapter - Allow VMs Host-only Adapter - Allow All Edit ipconfig /all of DC ipconfig /all of SQL-A

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• WSUS is not using Akamai CDN for syncronisation source

  - by Geekman

  I've just installed a WSUS onto our network, and I'm currently doing the initial sync. I've found that WSUS does not seem to be talking to an Akamai cache, but rather with MS directly. This is contrary to what I've always thought regarding Windows Update traffic. Tcpdump of our WSUS server doing initial sync... As you can see it's speaking with 65.55.194.221. For me to speak to this IP, I have to go over international transit links. Which is of course not ideal. 8:42:31.279757 IP 65.55.194.221.https > XXXX.XXXX.XXXX.XXXX.50888: Flags [.], seq 4379374:4380834, ack 289611, win 256, length 1460 18:42:31.279759 IP 65.55.194.221.https > XXXX.XXXX.XXXX.XXXX.50888: Flags [.], seq 4380834:4382294, ack 289611, win 256, length 1460 18:42:31.279762 IP 65.55.194.221.https > XXXX.XXXX.XXXX.XXXX.50888: Flags [.], seq 4382294:4383754, ack 289611, win 256, length 1460 18:42:31.279764 IP 65.55.194.221.https > XXXX.XXXX.XXXX.XXXX.50888: Flags [P.], seq 4383754:4384144, ack 289611, win 256, length 390 18:42:31.279793 IP XXXX.XXXX.XXXX.XXXX.50888 > 65.55.194.221.https: Flags [.], ack 4369154, win 23884, length 0 18:42:31.279888 IP XXXX.XXXX.XXXX.XXXX.50888 > 65.55.194.221.https: Flags [.], ack 4377914, win 23884, length 0 18:42:31.280015 IP XXXX.XXXX.XXXX.XXXX.50888 > 65.55.194.221.https: Flags [.], ack 4384144, win 23884, length 0 And yet, if I ping download.windowsupdate.com it seems to resolve to a local (national) Akamai node, just fine: root@some-node:~# ping download.windowsupdate.com PING a26.ms.akamai.net (210.9.88.48) 56(84) bytes of data. 64 bytes from a210-9-88-48.deploy.akamaitechnologies.com (210.9.88.48): icmp_req=1 ttl=59 time=1.02 ms 64 bytes from a210-9-88-48.deploy.akamaitechnologies.com (210.9.88.48): icmp_req=2 ttl=59 time=1.10 ms Why is this? And how can I change that (if possible)? I know that I can manually specify a WSUS source to sync with instead of pick the default MS Update like I currently have... But it seems like I shouldn't have to do this. NOTE: I've haven't confirmed if a WUA speaks with Akamai, just looking at WSUS as all WUAs will use our internal WSUS from now on. We'll be looking to join an IX shortly with the hopes of peering with an Akamai cache and have very fast access to Windows Updates. Before I let this drive my motivations for an IX at all I want to first confirm it's actually possible for WSUS to speak with an Akamai cache. I know this is somewhat networking related, but I feel like it has more to do with WSUS than anything, so someone who knows WSUS better than me will likely be able to figure this out.

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• Suspected network performance issue on VirtualBox Ubuntu guest on Win7 host

  - by Adam

  I set up Ubuntu 12.04 in VirtualBox on the Win7 machine I was allocated on my new project. I am running Java, Eclipse, Tomcat to develop a large data-intensive application and I noticed that this application runs at half the speed of my colleague's identical machine, where he runs it all under Windows. I think I have narrowed down the performance issue to the network, after comparing and equalising all the Java VM settings with my colleague. Is there a ping test I can do or some other network diagnostic test to flag up any problems? To give some background, the network performance is confusing. Running a network speed test to my colleague's machine with iperf shows speeds of 6 Mb/s from my Ubuntu guest, and 90 Mb/s from the win7 host. Large downloads, e.g. the Java SDK, come down at about 1.2 MB/s on both the guest and the host. Pings are sub-1ms on the host, but 1.5ms on the guest. I also did a broadband speed test, and got 10Mb/s download speed on both, but the host has an upload speed of 10Mb/s but the guest only uploads at 3Mb/s. I've been trying to diagnose any MTU problems with ping -M do to identify any kind of packet fragmentation problem but it's progressing very slow because I don't have much experience in this area. From what I read on other people's networking issues with VB and Linux guests on Win7 hosts, I should be able to get the speed on the guest up to the same level as the host. I installed a fresh VM with Ubuntu again to see if I'd foobar'd it somehow, but I'm getting the same readings with iperf on the virgin installation. My setup is: Adapter 1: Intel PRO/1000 MT Desktop (NAT) Adapter 2: ditto (host-only adapter) eth0 Link encap:Ethernet HWaddr 08:00:27:0b:76:bf inet addr:10.0.2.15 Bcast:10.0.2.255 Mask:255.255.255.0 inet6 addr: fe80::a00:27ff:fe0b:76bf/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:86236 errors:0 dropped:0 overruns:0 frame:0 TX packets:49369 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:69163946 (69.1 MB) TX bytes:3530535 (3.5 MB) eth2 Link encap:Ethernet HWaddr 08:00:27:a3:26:b8 inet addr:192.168.56.101 Bcast:192.168.56.255 Mask:255.255.255.0 inet6 addr: fe80::a00:27ff:fea3:26b8/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:59 errors:0 dropped:0 overruns:0 frame:0 TX packets:57 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:9148 (9.1 KB) TX bytes:7648 (7.6 KB) lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:701 errors:0 dropped:0 overruns:0 frame:0 TX packets:701 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:66321 (66.3 KB) TX bytes:66321 (66.3 KB)

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• Virtualbox - routing subnet to bridge adapters

  - by user42384

  Hello, I have set up a Debian Lenny box with 3 vbox Lenny machines running eth0 of the host in bridged mode (on virtualbox 3.1.6). When testing in my local LAN, this all worked perfectly well and traffic flowed to and from the IPs of the virtual machines as it should. However, now that it's in its co-lo home, the networking setup is a bit different, and I'm unable to get traffic to flow to the vboxes properly. Specifically, the host has its own Primary IP, and I have a separate subnet of 8 (6 usable) IPs routed to the box for use by the vboxes. So, eth0 on host is: Machine IP: 2x.x.x.137 Gateway IP: 2x.x.x.138 Subnet Msk: 255.255.255.252 Subnet for vboxes is Subnet: 2x.x.x.240/29 Netmask: 255.255.255.248 vbox1 is configured to 2x.x.x.241 on eth0 as follows: auto eth0 iface eth0 inet static address 2x.x.x.241 netmask 255.255.255.248 Setting up a virtual interface (eth0:0) on the host with one of these subnet IPs allows me to ping to that address only from vbox1, and it allows me to ping vbox1 from the host. I can also ping that virtual interface perfectly well from outside, so the IPs are definitely landing at my machine. It seems I'm missing some sort of routing instruction either on the host or vbox1 to get traffic moving between the subnet and the default gateway, but I can't seem to figure out what it should be, or what glaringly obvious thing i'm missing. Most of my obvious attempts (the gw of eth0, the ip of eth0) were rejected by route command with SIOCADDRT: No such device (eg - i can't find it). I tried setting vbox1 to bridge on eth0:0, but this was not an acceptable device name and VBoxHeadless refused to start. The physical machine does have an unused physical NIC at eth1 that can be used if necessary for something or other. Host machine is running iptables configured by ferm, have experimented with it allowing forwarding for that subnet, but I wouldn't have thought this was necessary given the nature of the virtualbox devices (nor did it actually work). Clearing out all of these rules for a blank iptables set does not resolve the issue. (you can see ferm generated iptables at http://codedumper.com/ojaze) Thanks for any help you can give... Patrick

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• Routing with VPN and asymmetric communication

  - by Louis

  I'm stumbling on a problem that requires your advice. Keywords : networking, route, openVPN Problem : I have a local network with several physical servers and VMs. These machines have ip's in the range 10.10.x.x. I can access these machines from the Internet with the help of openVPN. These machines can : access each other within the local 10.10.x.x subnet access the Internet via the VPN can themselves be accessed (via SSH) from the Internet via the VPN. There is one machine however that behaves strangely and I don't know why. I can SSH into this machine from anywhere via SSH and I can also PING it from anywhere (including the Internet). However from this machine (i.e. when logged into it) I cannot access the Internet or ping machines outside the local network. In other words it will not go beyond the VPN. My question is why? Here are some technical details: The machine's Network Config (running Debian 6.0.3): allow-hotplug eth0 iface eth0 inet static address 10.10.10.200 netmask 255.255.0.0 network 10.10.10.0 broadcast 10.10.10.255 gateway 10.10.10.200 The machine's Routing : Destination Gateway Genmask Flags MSS Window irtt Iface 127.0.0.1 0.0.0.0 255.255.255.255 UH 0 0 0 lo 10.10.0.0 10.10.10.250 255.255.0.0 UG 0 0 0 eth0 10.10.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0 0.0.0.0 10.10.10.250 0.0.0.0 UG 0 0 0 eth0 0.0.0.0 10.10.10.200 0.0.0.0 UG 0 0 0 eth0 The VPN's Network Config (running Debian 6.0.3): # This is the local network interface auto eth1 allow-hotplug eth1 iface eth1 inet static address 10.10.10.250 netmask 255.255.0.0 broadcast 10.10.10.255 gateway 10.10.10.250 The VPN's routing table Destination Gateway Genmask Flags MSS Window irtt Iface 10.10.0.0 0.0.0.0 255.255.255.0 U 0 0 0 tun0 private 0.0.0.0 255.255.255.0 U 0 0 0 eth0 10.10.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth1 0.0.0.0 10.10.10.250 0.0.0.0 UG 0 0 0 eth1 0.0.0.0 private 0.0.0.0 UG 0 0 0 eth0 net.ipv4.ip_forward = 1 on both machines. there are no iptables set anywhere. Thanks in advance for any feedback.

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• Windows 7 & Virtual PC and Internet (gateway) problems on host PC

  - by Mufasa

  I upgraded to Windows 7 on a PC that is a few years old. The CPU was one revision away from having Hyper-V on it. So, I had to install Microsoft Virtual PC 2007 (v6.0.156.0) to run full XP instances instead of the seamless XP virtualization that is advertised so much. That's fine though; the 'older' version is useful since I use it to run different versions of the whole XP/IE stack for testing. (I'm a web developer.) ...And for the one 16-bit application we still use at the office for scheduling. * sigh * The virtual instances work fine, including networking. My issue is that after a reboot or coming out of sleep mode, my host Windows 7 won't connect to the Internet. It will connect to the local network fine. If I disable the "Virtual Machine Network Services" item (I'll call "VMNS" from here on) in the LAN Connection properties box, it starts working. But than the Virtual PC instances lose their network connectivity. If I re-enable VMNS again in the same instance, everything works (Internet on host and in the virtualized instances). But after the next reboot/sleep cycle this starts over. The route table gave me a clue though. When doing a cycle w/ VMNS enabled: IPv4 Route Table =========================================================================== Active Routes: Network Destination Netmask Gateway Interface Metric 0.0.0.0 0.0.0.0 On-link 10.0.3.51 20 0.0.0.0 0.0.0.0 10.0.10.10 10.0.3.51 276 ... After VMNS is disabled, the first route goes away. I assume that is for VMNS to intercept virtualized instance's network connections and forward them correctly? Just a guess though. More info: I checked my Firewall settings and Services (because I'm sort of a control nazi and turn off a lot) but couldn't find anything that made sense and if turned on changed anything. So it might be something there I'm missing, but I don't know what. My current hacked solution: So, I figured I'd mess with the routes myself to see if that helped, it did. If I run a route delete 0.0.0.0 on the universal (0.0.0.0) gateway routes, and add back in just the 2nd line with route add 0.0.0.0 mask 0.0.0.0 10.0.10.10--the one that points to my actual gateway (10.0.10.10)--then I don't have to mess with the disable/enable cycle of VMNS, and everything works. Running those two commands is faster then bringing up connection options and disabling and re-enabling VMNS, but I still don't want to have use that hack script every boot either. (Oh, and I also tried messing with hard-coding TCP/IP settings in my network adapter, including setting high metrics, etc., but that didn't help either.) Any suggestions on the right way to fix this?

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• complete project of the book -- “ASP.NET 3.5 Social Networking” by Andrew Siemer

  - by user287745

  i have been reading, using vs too to get familiar with the step followed to write the coding...... i have reached the end, all the code the third party plug-ins, references etc have been made on running the work it gives a lot of errors, some are too hard to debug. can any one please help by giving the complete website this book has taught us to make?

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• Assigning a home DNS to be secondary only?

  - by Sanarothe

  Hi. I have a small domain lab set up at home, including DNS/DHCP on the Win2008 server. I'd like to be able to refer to my domain clients by name, but I find that I get a slowdown when using an internal DNS. Win DNS refers to my ISP's upstream dns (I also tried Google's DNS servers for a little while) but it feels like there's an extra couple seconds for each request when I'm using anything except the DNS servers fetched via DHCP from my ISP. I tried adding my local DNS to my router's DHCP (Need to use router to fetch DHCP info from ISP, even though none of it ever changes, since I'm behind NAT) So, my question is: Is there any way to set my internal DNS server to be secondary to a dynamically retrieved upstream DNS? I want the internal server to be queried only if the ISP dns fails, or to be queried only for a certain TLD (.iv right now. I guess for best practices I should change it to .internal)

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• WRT54G - how use port forwarding and VNC

  - by unknown (yahoo)

  Since I have my home network behind a WRT54G, the router has an external "real" IP address, and the PCs behind it have 192.168.xxx.xxx addresses. I would like to be able to control one of them remotely - preferably using UltraVNC, but I am open to suggestions. Since I can't directly address that PC from the internet, I figured I could address a port on my router and have the traffic forwarded to the PC (and the same in the reverse direction). Is that feasible? Can anyone tell me how to do it (or point me to an URL that does)? Thanks

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• Keep getting invalid IP via WiFi

  - by nmuntz

  There is something wrong with my WiFi. I keep getting an invalid IP via DHCP (169.254.x.x), this happens for ALL wifi connections (home, office, etc). If I try a Local Ethernet connection via cable it works fine. I have tried downloading the latest drivers for my wireless adapter, resetting the TCP Stack and still have this issue. One strange thing I notice is under Device Manager, Network Adapters I have 4 "Unknown Devices" and three "Remote NDIS based Internet Sharing Device". My guess is that this belongs to McAfee. Not sure if this is related or not, anyways to try to fix this I tried downloading the NetLUIDfix.exe utility from McAfee but it didn't work. Any ideas how to solve this annoying issue? Thanks!!

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• Windows 7 file sharing password protecting or making stuff available to just me

  - by Carbonara

  Even with the new Homegroup feature I'm still finding the way Windows deals with folder sharing utterly baffling. Here's what I want to do. I have two computers, a PC Desktop and a laptop. I also live in a shared flat with other computer users. I have set up a Homegroup and a Workgroup on the desktop and joined them on the laptop and in the home group I have shared video, music and pictures. This is so that anyone on the network can view pictures and listen to music etc. But I want my Documents folder from my desktop to only be available to me on my laptop and not to anyone else that may be on the network. The Homegroup only allows (from what I can gather from the baffling array of options) sharing with everyone or no one. Is it possible to only allow the laptop to access the documents folder on the desktop? The user name and password are the same on both computers.

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• Client-Server Networking Between PHP Client and Java Server

  - by Muhammad Yasir

  Hi there, I have a university project which is already 99% completed. It consists of two parts-website (PHP) and desktop (Java). People have their accounts on the website and they wish to query different information regarding their accounts. They send an SMS which is received by desktop application which queries database of website (MySQL) and sends the reply accordingly. This part is working superbly. The problem is that some times website wishes to instruct the desktop application to send a specific SMS to a particular number. Apparently there seems no way other than putting all the load to the DB server... This is how I made it work. Website puts SMS jobs in a specific table. Java application polls this table again and again and if it finds a job, it executes it. Even this part is working correctly but unfortunately it is not acceptable by my university to poll the DB like this. :( The other approach I could think of is to use client-server one. I tried making Java server and its PHP client. So that whenever an SMS is to be sent, the website opens a socket connection to desktop application and sends two strings (cell # and SMS message). Unfortunately I am unable to do this. I was successfully to make a Java server which works fine when connected by a Java client, similarly my PHP client connects correctly to a PHP server, but when I try to cross them, they start hating each other... PHP shows no error but Java gives StreamCorruptedException when it tries to read header of input stream. Could someone please tell what I can try to make PHP client and Java server work together? Or if the said purpose can be achieved by another means, how? Regards, Yasir

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• How to copy lots of files between two computers, without network?

  - by Steve Bennett

  I want to copy around 50Gb of files from my desktop to my work laptop. For some reason, the laptop won't connect to my home network. I haven't had any luck with a direct ethernet connection either, and I'm not willing to change any of the laptop's network configuration (last time I did that, I couldn't get onto the network at work, making me Not Very Popular). So...what else is there? The obvious route is copying via SD card. My largest card is 8Gb. But I can't find a good workflow. Is there a tool designed for this, where I could just repetitively move the card back and forth, without having to select files? I've tried using teracopy, but you end up missing a few files. I guess I could zip everything up into multi-volume .rars or something...but is there a more elegant way?

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• How to stop intermittent playback on airtunes (iTunes + Airport Express)?

  - by Alex B

  Is there a definitive answer for how to stop intermittent "skips" or pauses while playing music from iTunes to an airport express connected to my home stereo? When I read other forums I see a wealth of posts that say "I did XYZ and it's fixed" followed by "I tried XYZ and it didn't work." This does not appear to be signal strength related. The green light on the Airport Express does not turn to yellow/orange. Other wireless devices have no trouble connecting at the same or greater distances from the wireless router.

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• Google appengine authentication on iPhone web app on the home screen

  - by Rakesh Pai

  I'm using Google appengine for developing an web application that is meant to be used on both the browser and iphone. I have purchased a domain name for this application, so that I have a pretty URL. I've used the User API for authentication. This works just fine on desktop browsers and iPhone Safari. The user could add the application to the home screen (by tapping the "+" at the bottom toolbar). However when that's done, it seems like the cookies set by Google are not in affect within this "application", and the user is effectively logged out. To make matters worse, when the user clicks on the login link (as generated by GAE), the app closes and opens safari to complete the login. Since the session is apparently not shared between the two, the login process is futile, and the "home-screen" version of the app continues to be logged out. It seems that the cookies are not shared between a "home-screen" app and Safari. It also seems that the "home-screen" app will only work within it's own domain, and any redirect to any other domain will open Safari. Any idea how I can go about fixing this?

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• Dell Inspiron 1520 Intermittent connection to wireless router

  - by ChuckNevol

  I have two computers in my home which are connected to a wireless router and a wireless printer. One computer is a Del XPS and the other a Dell laptop Inspiron 1520. In recent weeks we noticed the Inspiron had difficulty maintaining connection to the wireless router - web pages would suddenly have to be reloaded, or the computer rebooted while the other computer, the XPS, had no problems on the same network. So we connected a hard wire line from the Inspiron to the Verizon supplied wireless router. Problems still exist. could it be a bad driver?

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• VPN for a small organization

  - by user24091

  I am in charge of a small office network that has < 10 users. I want to be able to offer them access to the network from their home internet connections. At the moment we have a regular ADSL-router-firewall to provide local network access and a fixed IP address. I know there are enterprise-level VPN solutions, but these obviously won't be available to us because of the cost and complexity. What small-scale solutions are around that you could recommend, what would we need to deploy on the client side, and what would the clients need to do to access the VPN? Simplicity and low cost need to be the keys here. Thanks

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• How to roll-your-own live CD for safe home browsing

  - by user36533

  Hi, I'm interested in booting-off-flash (i.e. like livecd) for more secure online banking at home. -I like system rescue CD, but AFAIK it doesn't have the wifi drivers. (These are convenient) -ubuntu live cd has the wi-fi drivers, but also has a lot of stuff I don't need -I'd like a way to save some basic config settings (e.g. wifi SSID and passphrase), so that wifi works upon startup, i.e. without having to re-enter the settings. What's the best way to 'roll my own slightly-customized boot-from-flash live cd? thanks, bill

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• ReadyNAS Duo - FTP home network connectivity issue

  - by dwabyick

  I have a ReadyNas Duo that I recently purchased and configured on my local home network. I'm an AT&T DSL subscriber using their default 2701HG-B Gateway (2Wire) wireless router. Basically, I have managed to configure my ReadyNAS, and can access HTTP shares and WINS shares just fine, but cannot get access to it via FTP. I've enabled it in the 'Standard File Protocols' section in the UI, and made a share have read/write default access via FTP. My settings: Port: 21 Authentication mode: User Allow upload resumes: Yes Passive ports: 1024-65535 Masquerade as: (empty, but I've tried the internal IP address). I've even poked around at my router, which has a firewall, and even tried to poke a hole for the 'FTP Server'app for the ReadyNAS. Doesn't seem like I should need to do this, or should. Any ideas what else to check? Thanks! -Daniel

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• Not able to find IIS Manager and enable IIS in Windows7 Home Basic

  - by Akshay

  I enabled IIS services in the add/remove windows components. However, when i want to open the manager, the IIS Manager does not appear under the administrative tools on the control panel. If i type the shortcut "inetmgr" into the run block it doesn't find it. However, i know the service installed correctly. It is a very frustrating problem since everyone says find it here or here but no one gives any help on what to do if is doesn't appear in the said locations at all. Can anyone please help me? The system i am using is Windows 7 home basic. The service installed correctly but i cannot find the IIS Manager.

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• Wireless network not working Linux Mint

  - by zharvey

  I have a home LAN that I am confident is working properly (I have a Windows 7 and an Ubuntu Desktop machine that both see the router and a working Internet connection). I just installed Linux Mint (Maya) on a new machine and although I can connect to the Internet via a wired (ethernet) connection, it does not see my wireless network. In fact, as you can see in the screenshot below, it doesn't even look like it has the drivers to be able to detect a wireless network... I have ran update manager and made sure that I am up-to-date with everything and have restarted. Any ideas here?!?

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• windows 7 no internet access

  - by Kyle

  Just did a fresh install of Windows 7, and the network and sharing center says no internet access. Disabling and enabling the adapter seems to fix the issue temporarily, but the internet stops working shortly after. I have installed the latest NIC drivers and have installed all Windows updates. I have also tried manually setting the ip/gateway/dns and running netsh int ip reset in an elevated command prompt. I am running Windows 7 Home Premium 64bit with a wired connection. I have searched for hours, but have found no working solutions. Does anyone have any ideas?

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