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• Ubuntu won't connect to wired network

  - by djeikyb

  I'm running 10.04, upgraded from 9.10, maybe, but probably not upgraded from 9.04. I have two wifi routers. Zeus is connected to the dsl modem. Hermes uses a wds bridge with Zeus to extend the network. My desktop (Daedalus) is ethernetted to Hermes. My laptop (Clyde) is wifi, switching to Hermes or Zeus as needed. Occasionally, as in whenever I transfer a large file from desktop to laptop, the wds bridge will die. Fixing it means restarting both routers, though it seems Hermes should boot first. This is ridiculous, and eventually I'll get around to asking you guys to help me stop it from happening. More importantly is that my desktop requires a reboot to get back on the network. WTF. ifconfig shows my nic has no ip. /etc/init.d/networking restart doesn't do anything, not even give me a lousy ip. dhcpcd eth1 grants me an ip address, but doesn't help with internet access. route -n shows what looks like my normal routing table, but pinging google.com informs me it's an unknown host. jake@daedalus:~$ route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 10.1.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1 169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth1 0.0.0.0 10.1.1.1 0.0.0.0 UG 0 0 0 eth1 It may be worth noting that I can ping both Zeus (10.1.1.1) and Hermes (10.1.1.4) and my laptop (10.1.1.55). Much obliged for any help. Rebooting is, well, trivial in this instance. But it's stupid. I switched to linux because I like the idea that if one part breaks, you fix it instead of reboot reboot reboot. I've left my poor desktop in disarray, confining myself to my little netbook. My desktop is broken, awaiting magical commands from you brilliant folk. (and yes, i know clyde the netbook should be named icarus. it was its original name. ironically the ssd burned out, and i felt it wasn't right when it came to reinstalling)

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• Multi Pass Blend

  - by Kirk Patrick

  I am seeking the simplest working example of a two pass HLSL pixel shader. It can do anything really, but the main idea is to perform "ping ponging" to take the output of the first pass and then send it for the second pass. In my example I want to draw to the R channel and then draw to the G channel and produce a simple Venn Diagram in the shader, but need to detect overlap. I can currently detect one or the other but not overlap. There are a red and green circle overlapping, and I want to put a dynamic texture map in the overlap region. I can currently put it in either or. Below is how it looks in the shader. -------------------------------- Texture2D shaderTexture; SamplerState SampleType; ////////////// // TYPEDEFS // ////////////// struct PixelInputType { float4 position : SV_POSITION; float2 tex0 : TEXCOORD0; float2 tex1 : TEXCOORD1; float4 color : COLOR; }; //////////////////////////////////////////////////////////////////////////////// // Pixel Shader //////////////////////////////////////////////////////////////////////////////// float4 main(PixelInputType input) : SV_TARGET { float4 textureColor0; float4 textureColor1; // Sample the pixel color from the texture using the sampler at this texture coordinate location. textureColor0 = shaderTexture.Sample(SampleType, input.tex0); textureColor1 = shaderTexture.Sample(SampleType, input.tex1); if (input.color[0]==1.0f && input.color[1]==1.0f) // Requires multi-pass textureColor0 = textureColor1; return textureColor0; } Here is the calling code (that needs to be modified) m_d3dContext->IASetVertexBuffers(0, 2, vbs, strides, offsets); m_d3dContext->IASetIndexBuffer(m_indexBuffer.Get(), DXGI_FORMAT_R32_UINT,0); m_d3dContext->IASetPrimitiveTopology(D3D11_PRIMITIVE_TOPOLOGY_TRIANGLELIST); m_d3dContext->IASetInputLayout(m_inputLayout.Get()); m_d3dContext->VSSetShader(m_vertexShader.Get(), nullptr, 0); m_d3dContext->VSSetConstantBuffers(0, 1, m_constantBuffer.GetAddressOf()); m_d3dContext->PSSetShader(m_pixelShader.Get(), nullptr, 0); m_d3dContext->PSSetShaderResources(0, 1, m_SRV.GetAddressOf()); m_d3dContext->PSSetSamplers(0, 1, m_QuadsTexSamplerState.GetAddressOf());

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• Latency Matters

  - by Frederic P

  A lot of interest in low latencies has been expressed within the financial services segment, most especially in the stock trading applications where every millisecond directly influences the profitability of the trader. These days, much of the trading is executed by software applications which are trained to respond to each other almost instantaneously. In fact, you could say that we are in an arms race where traders are using any and all options to cut down on the delay in executing transactions, even by moving physically closer to the trading venue. The Solaris OS network stack has traditionally been engineered for high throughput, at the expense of higher latencies. Knowledge of tuning parameters to redress the imbalance is critical for applications that are latency sensitive. We are presenting in this blog how to configure further a default Oracle Solaris 10 installation to reduce network latency. There are many parameters in fact that can be altered, but the most effective ones are intr_blank_time and intr_blank_packets. These parameters affect on-board network throughput and latency on Solaris systems. If interrupt blanking is disabled, packets are processed by the driver as soon as they arrive, resulting in higher network throughput and lower latency, but with higher CPU utilization. With interrupt blanking disabled, processor utilization can be as high as 80–90% in some high-load web server environments. If interrupt blanking is enabled, packets are processed when the interrupt is issued. Enabling interrupt blanking can result in reduced processor utilization and network throughput, but higher network latency. Both parameters should be set at the same time. You can set these parameters by using the ndd command as follows: # ndd -set /dev/eri intr_blank_time 0 # ndd -set /dev/eri intr_blank_packets 0 You can add them to the /etc/system file as follows: set eri:intr_blank_time 0 set eri:intr_blank_packets 0 The value of the interrupt blanking parameter is a trade-off between network throughput and processor utilization. If higher processor utilization is acceptable for achieving higher network throughput, then disable interrupt blanking. If lower processor utilization is preferred and higher network latency is the penalty, then enable interrupt blanking. Our experience at ISV Engineering is that under controlled experiments the above settings result in reduction of network latency by at least 50%; on a two-socket 3GHz Sun Fire X4170 M2 running Solaris 10 Update 9, the above settings improved ping-pong latency from 60µs to 25-30µs with the on-board NIC.

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• links for 2011-01-12

  - by Bob Rhubart

  WebCenter Spaces 11g PS2 Template Customization (Javier Ductor's Blog) "Recently, we have been involved in a WebCenter Spaces customization project. A customer sent us a prototype website in HTML, and we had to transform Spaces to set the same look and feel as in the prototype..." Javier Ductor (tags: oracle otn webcenter enteprise2.0) Matt Carter: Risky Business "Incorporating risk detection and mitigation capabilities into apps is becoming all the rage. There are plenty of real-life examples of cases where prevention of cyber-security threats and fraudsters might have kept governments and companies out of the news, and with more money in their accounts." (tags: oracle otn security middleware) John Brunswick: 5 Surprisingly Good Benefits of Corporate Blogs "Some may still propose that not all corporations are going to be able to provide the five benefits above and are more focused around shameless self promotion of products and services.  If that is the case, that corporation is most likely not producing something of high value." - John Brunswick (tags: oracle otn enterprise2.0 blogging) InfoQ: IT And Architecture: Inside-Out Perspectives The software industry is in disarray, costs are escalating, and quality is diminishing. Promises of newer technologies and processes and methodologies in IT are still far from materializing on any significant scale. Bruce Laidlaw and Michael Poulin - each with more than 30 years of experience compared notes on the past and present of IT and provide insights on what IT needs to make progress. (tags: ping.fm) SOA & Middleware: Canceling a running composite instance - example Useful tips from Niall Commiskey. (tags: soa middleware oracle) BPEL 11.1.1.2 Certified for Prebuilt E-Business Suite 12.1.3 SOA Integrations (Oracle E-Business Suite Technology) "A new certification was released simultaneously with the E-Business Suite 12.1.3 Maintenance Pack late last year: the use of BPEL 11g Version 11.1.1.2 with E-Business Suite 12.1.3." -- Steven Chan (tags: oracle bpel) Marc Kelderman: OSB: Deploy Service Level Agreement (SLA), aka Alert Rule "The big issue with these SLAs is the deployment. If you have dozens of services, with multiple operations, and you have a lot of environments it takes a while to create them...[But] I have a nice workaround." - Mark Kelderman  (tags: oracle otn soa osb sla) @myfear: Java EE 7 - what's coming up for 2012? First hints. "Even if the actual Java EE 6 version is still not too widespread, we already have seen the first signs of the next EE 7 version written to the sky." -- Markus "myfear" Eisele (tags: oracle otn oracleace java)

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• Bridging 10GbE with 12.04 - bridging works but the bridging computer has no internet access

  - by Donal

  I have been trying to get 12.04 bridging working with two 10GbE cards. I have 2 10GbE cards in a linux box being used only for this bridge, 1 with 2 10GbaseT ports and another with a single CX4 port. I have 2 client computers connected with 10GbaseT cards and the CX4 card connects to a procurve switch. I can get the bridging happening mostly the way that I want, The clients receive dhcp information from the dhcp server (not the bridging machine) and can connect to and properly see the rest of the network. Speeds are ok, not amazing but working on that is another matter. My problem is that the bridging machine has no internet access ... meaning I can't update anything or apt-get anything It can ping all other machines on the local network. I've tried the helpful hints from: https://help.ubuntu.com/community/NetworkConnectionBridge "Enabling Internet Use on the Bridging Computer" and get the following RTNETLINK answers: File exists but dhclient br0 does nothing for me :( I think if it is anything it a multiple route problem as both br0 and eth4 have ipaddresses ... even though I have only set it up so that br0 has one ... Bridge setup details: /etc/network/interface auto br0 iface br0 inet static address 192.168.0.246 netmask 255.255.255.0 gateway 192.168.0.1 broadcast 192.168.0.255 dns-nameservers 192.168.0.1 dns-search example.com dns-domain example.com #(eth2 & eth3 are the 10GbaseT) #(eth4 is the CX4 connection) pre-up ip link set eth2 down pre-up ip link set eth3 down pre-up ip link set eth4 down pre-up brctl addbr br0 pre-up brctl addif br0 eth4 eth3 eth2 pre-up ip addr flush dev eth3 pre-up ip addr flush dev eth2 pre-up ip addr flush dev eth4 post-down ip link set eth4 down post-down ip link set eth2 down post-down ip link set eth3 down post-down ip link set br0 down post-down brctl delif br0 eth2 eth3 eth4 post-down brctl delbr br0 ifconfig -a br0 Link encap:Ethernet HWaddr 00:15:17:22:20:34 inet addr:192.168.0.102 Bcast:192.168.0.255 Mask:255.255.255.0 inet6 addr: fe80::215:17ff:fe22:2034/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:4957 errors:0 dropped:0 overruns:0 frame:0 TX packets:1077 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:596320 (596.3 KB) TX bytes:139952 (139.9 KB) eth4 Link encap:Ethernet HWaddr 00:60:dd:47:7c:05 inet addr:192.168.0.57 Bcast:192.168.0.255 Mask:255.255.255.0 inet6 addr: fe80::260:ddff:fe47:7c05/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:9000 Metric:1 RX packets:15391 errors:0 dropped:51 overruns:0 frame:0 TX packets:1207 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:5916769 (5.9 MB) TX bytes:154312 (154.3 KB) Interrupt:70 route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 192.168.0.1 0.0.0.0 UG 0 0 0 eth4 0.0.0.0 192.168.0.1 0.0.0.0 UG 100 0 0 br0 169.254.0.0 0.0.0.0 255.255.0.0 U 1000 0 0 br0 192.168.0.0 0.0.0.0 255.255.255.0 U 0 0 0 br0 192.168.0.0 0.0.0.0 255.255.255.0 U 1 0 0 eth4

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• Gamification in the enterprise updates, September edition

  - by erikanollwebb

  Things have been a little busy here at GamifyOracle.  Last week, I attended a small conference in San Diego on Enterprise Gamification.  Mario Herger of SAP, Matt Landes of Google and I were on a panel discussion about how to introduce and advocate gamification in your organization.  I gave a talk as well as a workshop on gamification.  The workshop was a new concept, to take our Design Jam from Applications User Experience and try it with people outside of user experience.  I have to say, the whole thing was a great success, in great part because I had some expert help from Teena Singh from Apps UX.  We took a flow from expense reporting and created a scenario about sales reps who are on the road a lot and how we needed them to get their expense reports filed by the end of the fiscal year.  We divided the attendees into groups and gave them a little over two hours to work out how they might use game mechanics to gamify the flows.   We even took the opportunity to re-use the app our fab dev team in our Mexico Development Center put together to gamify the event including badges, points, prizes and a leaderboard.  Since I am a firm believer that you can't gamify everything (or at least, not everything well), I focused my talk prior to the workshop on when it works, and when it might not, including pitfalls to gamifying badly.  I was impressed that the teams all considered what might go wrong with gamifying expenses and built into their designs some protections against that.  I can't wait to take this concept on the road again, it really was a fun day. Now that we have gotten through that set of events, we're wildly working on our next project for next week.  I'm doing a focus group at Oracle OpenWorld on Gamification in the Enterprise.  To do that, Andrea Cantu and I are trying to kill as many trees as possible while we work out some gamification concepts to present (see proof below!).  It should be a great event and I'm hoping we learn a lot about what our customers think about the use of gamification in their companies and in the products they use. So that's the news so far from GamifyOracle land.  I'll try to get more out about those events and more after next week. And if you will be at OOW, ping me and we can discuss in person!  I'd love to know what everyone is thinking in the area.

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• No client internet access when setting up these iptables rules

  - by Siriss

  I have read many other posts but cannot figure this out. eth0 is my external connected to a Comcast modem. The server has internet access with no issues. eth1 is internal and running DHCP for the clients. I have DHCP working just fine, all my clients can get an IP and ping the server but they cannot access the internet. I am using ISC-DHCP-SERVER and have set /etc/default/isc-dhcp-server to INTERFACE="eht1" Here is my dhcpd.conf file located in /etc/dhcp/dhcpd.conf ddns-update-style interim; ignore client-updates; subnet 10.0.10.0 netmask 255.255.255.0 { range 10.0.10.10 10.0.10.200; option routers 10.0.10.2; option subnet-mask 255.255.255.0; option domain-name-servers 208.67.222.222, 208.67.220.220; #OpenDNS # option domain-name "example.com"; default-lease-time 21600; max-lease-time 43200; authoritative; } I have made the *net.ipv4.ip_forward=1* change in /etc/sysctl.conf here is my interfaces file: auto lo iface lo inet loopback auto eth0 iface eth0 inet dhcp iface eth1 inet static address 10.0.10.2 netmask 255.255.255.0 network 10.0.10.0 auto eth1 And finally- here is my iptables.conf file: # Firewall configuration written by system-config-firewall # Manual customization of this file is not recommended. *nat :PREROUTING ACCEPT [0:0] :OUTPUT ACCEPT [0:0] :POSTROUTING ACCEPT [0:0] -A POSTROUTING -s 10.0.10.0/24 -o eth0 -j MASQUERADE #-A PREROUTING -i eth0 -p tcp --dport 59668 -j DNAT --to-destination 10.0.10.2:59668 COMMIT *filter :INPUT ACCEPT [0:0] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [0:0] -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT -A INPUT -p icmp -j ACCEPT -A INPUT -i lo -j ACCEPT -A INPUT -i eth1 -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 443 -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 53 -j ACCEPT -A INPUT -m state --state NEW -m udp -p udp --dport 53 -j ACCEPT -A FORWARD -s 10.0.10.0/24 -o eth0 -j ACCEPT -A FORWARD -d 10.0.10.0/24 -m state --state ESTABLISHED,RELATED -i eth0 -j ACCEPT -A FORWARD -p icmp -j ACCEPT -A FORWARD -i lo -j ACCEPT -A FORWARD -i eth1 -j ACCEPT #-A FORWARD -i eth0 -m state --state NEW -m tcp -p tcp -d 10.0.10.2 --dport 59668 -j ACCEPT -A INPUT -j REJECT --reject-with icmp-host-prohibited -A FORWARD -j REJECT --reject-with icmp-host-prohibited COMMIT I am completely stuck. I cannot figure out why the clients cannot access the internet. Am I missing a service? Is a service not running? Any help would be greatly appreciated. I tried to be as thorough as possible but please let me know if I have missed something. Thank you!

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• How to properly do weapon cool-down reload timer in multi-player laggy environment?

  - by John Murdoch

  I want to handle weapon cool-down timers in a fair and predictable way on both client on server. Situation: Multiple clients connected to server, which is doing hit detection / physics Clients have different latency for their connections to server ranging from 50ms to 500ms. They want to shoot weapons with fairly long reload/cool-down times (assume exactly 10 seconds) It is important that they get to shoot these weapons close to the cool-down time, as if some clients manage to shoot sooner than others (either because they are "early" or the others are "late") they gain a significant advantage. I need to show time remaining for reload on player's screen Clients can have clocks which are flat-out wrong (bad timezones, etc.) What I'm currently doing to deal with latency: Client collects server side state in a history, tagged with server timestamps Client assesses his time difference with server time: behindServerTimeNs = (behindServerTimeNs + (System.nanoTime() - receivedState.getServerTimeNs())) / 2 Client renders all state received from server 200 ms behind from his current time, adjusted by what he believes his time difference with server time is (whether due to wrong clocks, or lag). If he has server states on both sides of that calculated time, he (mostly LERP) interpolates between them, if not then he (LERP) extrapolates. No other client-side prediction of movement, e.g., to make his vehicle seem more responsive is done so far, but maybe will be added later So how do I properly add weapon reload timers? My first idea would be for the server to send each player the time when his reload will be done with each world state update, the client then adjusts it for the clock difference and thus can estimate when the reload will be finished in client-time (perhaps considering also for latency that the shoot message from client to server will take as well?), and if the user mashes the "shoot" button after (or perhaps even slightly before?) that time, send the shoot event. The server would get the shoot event and consider the time shot was made as the server time when it was received. It would then discard it if it is nowhere near reload time, execute it immediately if it is past reload time, and hold it for a few physics cycles until reload is done in case if it was received a bit early. It does all seem a bit convoluted, and I'm wondering whether it will work (e.g., whether it won't be the case that players with lower ping get better reload rates), and whether there are more elegant solutions to this problem.

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• How to synchronize the ball in a network pong game?

  - by Thaars

  I’m developing a multiplayer network pong game, my first game ever. The current state is, I’ve running the physic engine with the same configurations on the server and the clients. The own paddle movement is predicted and get just confirmed by the authoritative server. Is a difference detected between them, I correct the position at the client by interpolation. The opponent paddle is also interpolated 200ms to 100ms in the past, because the server is broadcasting snapshots every 100ms to each client. So far it works very well, but now I have to simulate the ball and have a problem to understanding the procedure. I’ve read Valve’s (and many other) articles about fast-paced multiplayer several times and understood their approach. Maybe I can compare my ball with their bullets, but their advantage is, the bullets are not visible. When I have to display the ball, and see my paddle in the present, the opponent in the past and the server is somewhere between it, how can I synchronize the ball over all instances and ensure, that it got ever hit by the paddle even if the paddle is fast moving? Currently my ball’s position is simply set by a server update, so it can happen, that the ball bounces back, even if the paddle is some pixel away (because of a delayed server position). Until now I’ve got no synced clock over all instances. I’m sending a client step index with each update to the server. If the server did his job, he sends the snapshot with the last step index of each client back to the clients. Now I’m looking for the stored position at the returned step index and compare them. Do I need a common clock to sync the ball? EDIT: I've tried to sync a common clock for the server and all clients with a timestamp. But I think it's better to use an own stepping instead of a timestamp (so I don't need to calculate with the ping and so on - and the timestamp will never be exact). The physics are running 60 times per second and now I use this for keeping them synchronized. Is that a good way? When the ball gets calculated by each client, the angle after bouncing can differ because of the different position of the paddles (the opponent is 200ms in the past). When the server is sending his ball position, velocity and angle (because he knows the position of each paddle and is authoritative), the ball could be in a very different position because of the different angles after bouncing (because the clients receive the server data after 100ms). How is it possible to interpolate such a huge difference? I posted this question some days ago at stackoverflow, but got no answer yet. Maybe this is the better place for this question.

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• how did Google Analytics kill my site?

  - by user1813359

  Yesterday I created a google analytics profile for one of my sites and included the JS block in the layout template. What happened next was very strange. Within about 2 minutes, the site had become unreachable. I had been checking the AWStats page for the site when I thought to set up GA. After that had been done, I clicked on the link for 404 stats, which opens in a new tab. It churned for a long while and then showed a nearly blank page, similar to that when Firefox chokes on a badly-formatted XML page, except there was no error msg. But i was logged into the server and could see that that page has a 401 Transitional DTD. Strange! I tried viewing source but it just churned endlessly. I then tried "inspect element" and was able to see an error msg having to do with some internal Firefox lib. Unfortunately, i neglected to copy that. :-( All further attempts to load anything on the site would time out. Firebug's Net panel showed no request being made. Chrome would time out. So, I deleted the GA profile, removed the JS block, and cleared the server cache. No joy. I then removed all google cookies and disabled JS. Still nothing. No luck in any other browser. And now my client couldn't access the site. Terrific. I was able use wget while logged into another server. The retrieved page was fine, and did not contain the GA JS block. However, the two servers are on the same network. (Perhaps a clue.) The server itself was fine. Ping, traceroute looked great. I could SSH in. I tailed the access log and tried a browser request. Nothing. But i forgot to quit and a minute or so later I saw a request from someone else being logged. Later, I could see that requests had been served all day to some people. Now, 24 hours later, the site works once again, but is still unreachable by the client (who is in another city). So, does anyone have some insight into what's going on? Does this have something to do with google's CDN? I don't know very much about how GA works but what I'm seeing reminds me of DNS propagation issues. And why the initial XML error? And why the heck was the site just plain unreachable? What did google do to my site?! Sorry for the length but I wanted to cover everything.

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• What does this SAP error mean? recv104 NiIReadrecv nixxi.cp5087

  - by Techboy

  I have an SAP BI Portal system and an SAP BW system. In the Visual Administrator of the BI Portal, section 'JCo RFC Provider' I have created some RFC listeners. In the SAP BW system (in transaction SM59), I have created, tested and activated the relevant RFC connections. When I start a JCo RFC Provider in the BI Portal the BW system that it communicates with produces these errors (displayed from SAP transaction SM21): Operating system call recv failed (error no. 104 ) Module nam Line Error text Caller.... Reason/cal nixxi.cp 5087 recv104 NiIRead recv Documentation for system log message Q0 I : The specified operating system call was returned with an error. For communication calls (receive, send, etc) often the cause of errors are network problems. It could also be a configuration problem at operating system level. (file cannot be opened, no space in the file system etc.). Additional specifications for error number 104 Name for errno number E_UNKNOWN_NO The meaning of the value stored in 'errno' is platform-dependent. The value which occurred here is unknown to the SysLog system. Either there is an incorrect error number in the SysLog message, or the tables TSLE2 or TSLE3 are not completely maintained. Technical details File Offset RecFm System log type Grp N variable message data 6 410220 m Error (Function,Module,Row) Q0 I recv104 NiIReadrecv nixxi.cp5087 There is plenty of space left in the file system, the servers can ping each other and there is no firewall between the servers. The tables (TSLE2 or TSLE3) mentioned in the error message do not provide any additional information. Please can you tell me if this error message refers to something specific, or if it is generic: recv104 NiIReadrecv nixxi.cp5087

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• RouterOS on Hyper-V (v3/2012) - any way to get it working?

  - by TomTom

  Trying to set up a small VPN point to connect into a remote Hyper-V cluster using ROuterOS. Anyone got it working ON Hyper-V with the latest builds of RouterOS? It seems the legacy network adapter is not supported anymore either (or just broken). The platform is a Windows Server 2012 RC. This is not a high performance setup - the RouterOS wont do the routing for more than the backend administrative access, and the only real traffic we will see there is when ISO images for new operating systems are uploaded. Otherwise we will have possibly RDP traffic as well as web / http traffioc, but this is internal only (dashboards, some control panel). The server has no public business. So the price for non virtualized network cards is ok for me. After hooking up - ping just does not work. After some time I see in windows (arp -a on the command line), so I know that the Hyper-V side is set up properly. Just no packets arrived. I have turned off all protection on Hyper-V (or : not turned them on), so no MAC spoofing protection etc. in the Advanced page for the legacy adapters. Unless I can get it work I will have to resort to using a windows install as router / VPN endpoint, which introduces another OS into the fabric (we run all routers etc. so far on mikrotik in hardware, which is why I want this one to be RouterOS, too). And no, putting hardware there is NOT an option - the cost would be significant.

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• Access to message queuing system is denied MSMQ?

  - by user1401694

  My problem is a little confusing. I have 2 servers (Windows Server 2008 R2) with MSMQ installed and I want to use Server B to consume a MessageQueue on Server A. When I try to Receive it always throws a message error: "Access to message queuing system is denied.". IP between them. Server A: 172.31.23.130 Server B: 172.31.23.195 FormatName:Direct=TCP:172.31.23.195\private$\queuesource (It's working for Sends) I can ping each server from the other; The firewall is disabled; The "queuesource" has Full Control to "Everyone", "Anonymous Logon", "Network", "Network Services"; Journal is disabled; Authentication is ok; The queue is Transactional. My code in .Net C# is basically like this: MessageQueue _sourceQueue = new MessageQueue(); _sourceQueue.Path = "FormatName:Direct=TCP:172.31.23.195\private$\queuesource"; _sourceQueue.Receive(); // << here throw an exception. Actually I'm using the Private Queue only to avoid Active Directory's problems. For example, if the server DNS fail all network fail. I don't know what do anymore.

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• Port forwarding on Fortigate 50B

  - by sindre j

  I have serious problems setting up port forwarding on a Fortigate 50B. The unit is basically running as factory default, the wan1 interface is connected to my fibre optic internet modem, and my lan is connected to the internal switch of the Fortigate. The factory default firewall policy allowing traffic from the internal interface to wan1 is kept and I'm able to access the interet as normal. Then I added a virtual ip and a firewall policy for allowing access from the internet to my local servers (ip 192.168.9.51) webserver (standard port 80). The settings I made are as follows. Edit Virtual IP Mapping Name : Server VIP External interface : wan1 Type : Static NAT Extermal IP Address/Range : 0.0.0.0 Mapped IP Address/Range : 192.168.9.51 Port Forwading : not checked Firewall policy Source interface/Zone : wan1 Source address : all Destination interface/Zone : internal Destination address : Server VIP Schedule : always Service : HTTP Action : ACCEPT no other settings checked What happens now is that I'm unable to access internet from my server, I'm not getting through to the webserver from internet either. I'm able to ping a site on the outside, but all web traffic is blocked, both ways. I've checked the documentation, but as far as I can tell I have set this up correctly. Anyone here with knowledge of Fortigate port forwading/NAT?

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• Outlook 2007 unable to connect to exchange server

  - by mattwarren

  I came into the office a week ago and outlook has refused to connect ever since, it just says "Disconnected" in the bottom right-hand corner. I've tried restarting it, rebooting Windows etc. I'm the only one if our office who is having this problem, so it's not a general problem with the server. Things I've tried Pinging the server via IP address and host name, both work fine Connecting via OWA, this works using the same machine name Connecting to Exchange via HTTP ("Outlook Anywhere") doesn't work None of the suggestions in this question helped, http://serverfault.com/questions/21755/can-ping-exchange-server-cant-connect-outlook-to-it Disabling Windows firewall on my laptop also has no effect. There are no items in the event viewer that indicate that anything it up. Also no permissions have changed on the server since when it worked. Update: I've just tried logging onto a completely different PC, using my domain controller user-name/password. When I setup outlook on there it also fails, so the problem isn't specific to 1 pc/outlook it's something about my particular user name, but not when using OWA? What else can I do to diagnose this, any suggestions?

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• UNC Path fails by IP "no network provider accepted the given network path", but works using hostname

  - by BoyMars

  I have an unusual problem with a Windows Server 2003 (Standard x86) box. It appears the machine will not accept connections to its shares (locally and from other domain member servers) by using its ip address in a UNC path. The error returned is: "no network provider accepted the given network path" This is the case with the machine's ip address: \\10.0.8.x and even the loopback address: \\127.0.0.1 \\localhost does not work... but using the hostname (fqdn or not) works: \\server & \\server.domain.local The local windows firewall for this server is off, ping/rdp/other services respond fine using the IP address. The following services are running and have been restarted: Computer Browser Workstation Server The server itself has been rebooted too. Event 8032 in the system log indicates that: The browser service has failed to retrieve the backup list too many times on transport \Device\NetBT_Tcpip_{29A6A925-AFB3-47E2-BA59-DDA086DEAE7A}. The backup browser is stopping. The domain controller has not been restarted, no other servers have experienced this problem, yet there are a number of browser (8021) related errors in the logs on this server. Does anyone have any suggestions? I would like to avoid rejoining this server to the domain if possible.

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• Cisco: Site-to-site VPN with cisco 878 and ASA weirdness

  - by cpf

  I currently have 2 sites, both connected to each other through 2 firewalls / routers in a site-to-site VPN. Pinging from server to server (Using 2mb/2mb SDSL) through that VPN obviously works, however, at one site, we have another internet connection (7m/400k ADSL), and only the link between the two sites should be on the other connection. All pc's should go over the other connection for internet, just communication between servers & Communication between pc's and the server at the other side should go through there too. What is configured at the moment is the server is using the SDSL directly as default gateway. Since it's not intended to surf anything it is a safe config. PC's are configured on the ADSL as default gateway. Now I wanted to route through everything that uses the range used on the other site, it should be sent from the ADSL modem to the SDSL modem, which has the VPN connection. I figured I could use OSPF to do so, however, OSPF doesn't seem to "detect" the range of the external site. Also (due to bad ip subnetting thanks to the other administrator), the ip used internally as the server on the other site also exists on the internet (causing a lot of confusion), so rdp-ing from our server to the server of the other site works (somehow), but tracerouting on the SDSL router (which should actually, in my opinion, go over the VPN) actually goes all over the internet. My question(s): Why doesn't the SDSL router ping the external ip through VPN, but the server does? Why can't I route from the ADSL router to the SDSL over VPN? I would seriously appreciate some help, since I can't figure out why it does it like this.

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• Cisco ASA 5505 allowing inbound ICMPv6

  - by Astron

  I am trying to allow inbound unsolicited ICMPv6 requests from an external link-local address to my outside (external) interfaces link-local address. I can ping (echo-request) the external address and receive a pong (echo-reply) but ICMPv6 messages initiated on the far side are dropped. I am running 9.0(1) in order to use some of the newer features. Does the Cisco ASA not allow unsolicited inbound requests from a link-local address? Should it matter if all ICMPv6 is allowed? Statements being denied: %ASA-3-313008: Denied IPv6-ICMP type=129, code=0 from fe80::XXXX:XXXX:XXXX:XXXX on interface outside %ASA-3-313008: Denied IPv6-ICMP type=131, code=0 from fe80::XXXX:XXXX:XXXX:XXXX on interface outside %ASA-3-313008: Denied IPv6-ICMP type=131, code=0 from fe80::XXXX:XXXX:XXXX:XXXX on interface outside %ASA-3-313008: Denied IPv6-ICMP type=136, code=0 from fe80::XXXX:XXXX:XXXX:XXXX on interface outside %ASA-3-313008: Denied IPv6-ICMP type=136, code=0 from fe80::XXXX:XXXX:XXXX:XXXX on interface outside %ASA-3-313008: Denied IPv6-ICMP type=136, code=0 from fe80::XXXX:XXXX:XXXX:XXXX on interface outside I created both an inbound ACL and ICMP permit statements: access-list OUTSIDE-IN extended permit icmp6 any any access-list OUTSIDE-IN extended permit icmp6 any any membership-report access-list OUTSIDE-IN extended permit icmp6 any any membership-report 0 access-list OUTSIDE-IN extended permit icmp6 any any echo-reply 0 access-list OUTSIDE-IN extended permit icmp6 any any echo-reply access-list OUTSIDE-IN extended permit icmp6 any interface outside membership-report access-list OUTSIDE-IN extended permit icmp6 any interface outside membership-report 0 access-list OUTSIDE-IN extended permit icmp6 any6 any6 echo-reply access-list OUTSIDE-IN extended permit icmp6 any6 any6 membership-report access-list OUTSIDE-IN extended permit icmp6 any6 any6 echo-reply 0 access-list OUTSIDE-IN extended permit icmp6 any6 any6 membership-report 0 snip access-group OUTSIDE-IN in interface outside ipv6 icmp permit any inside ipv6 icmp permit any membership-report outside ipv6 icmp permit any echo-reply outside ipv6 icmp permit any router-advertisement outside ipv6 icmp permit any neighbor-solicitation outside ipv6 icmp permit any neighbor-advertisement outside ipv6 icmp permit any outside

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• mount.nfs: access denied by server while mounting (null), can't find any log information

  - by Mark0978

  Two ubuntu servers: 10.0.8.2 is the client, 192.168.20.58 is the server. Between the 2 machines, Ping works, ssh works (in both directions). From 10.0.8.2 showmount -e 192.168.20.58 Export list for 192.168.20.58: /imr/nfsshares/foobar 10.0.8.2 mount.nfs 192.168.20.58:/imr/nfsshares/foobar /var/data/foobar -v mount.nfs: access denied by server while mounting (null) Found several things online, tried them all and still can't find any log information anywhere. On the server: [email protected]:/var/log# cat /etc/hosts.allow sendmail: all ALL: 10.0.8.2 /etc/hosts.deny is all comments How can I get a trail of log statements to figure this out? What does it take to get some logging so I have some idea of WHY it won't mount? On the server: [email protected]# nmap -sR RPC 192.168.20.58 Starting Nmap 5.21 ( http://nmap.org ) at 2012-07-04 21:16 CDT Failed to resolve given hostname/IP: RPC. Note that you can't use '/mask' AND '1-4,7,100-' style IP ranges Nmap scan report for 192.168.20.58 Host is up (0.0000060s latency). Not shown: 988 closed ports PORT STATE SERVICE VERSION 22/tcp open unknown 80/tcp open unknown 111/tcp open unknown 139/tcp open unknown 445/tcp open unknown 902/tcp open unknown 2049/tcp open unknown 3000/tcp open unknown 5666/tcp open unknown 8009/tcp open unknown 8222/tcp open unknown 8333/tcp open unknown Nmap done: 1 IP address (1 host up) scanned in 3.81 seconds From the client: [email protected]:~$ nmap -sR RPC 192.168.20.58 Starting Nmap 5.21 ( http://nmap.org ) at 2012-07-04 22:14 EDT Failed to resolve given hostname/IP: RPC. Note that you can't use '/mask' AND '1-4,7,100-' style IP ranges Nmap scan report for 192.168.20.58 Host is up (0.73s latency). Not shown: 988 closed ports PORT STATE SERVICE VERSION 22/tcp open unknown 80/tcp open unknown 111/tcp open rpcbind (rpcbind V2) 2 (rpc #100000) 139/tcp open unknown 445/tcp open unknown 902/tcp open unknown 2049/tcp open nfs (nfs V2-4) 2-4 (rpc #100003) 3000/tcp open unknown 5666/tcp open unknown 8009/tcp open unknown 8222/tcp open unknown 8333/tcp open unknown Nmap done: 1 IP address (1 host up) scanned in 191.56 seconds

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• Windows 2003 Domain Controller Very Upset about NIC Teaming

  - by Kyle Brandt

  I set up BACS (Broadcom Teaming) to team two NIC on a Windows 2003 Active Directory Domain Controller. Networking still works okay, I can ping the gateway etc, but both DNS and Active Directory fail to start with various 40xx errors. The team that I created is Smart load Balancing with Failover, with one backup and only one in smart load balancing (So really it is just failover). I have the team the same IP address that the single active NIC had before. Anyone seen this before, or have any ideas what the problem might be? Event Type: Error Event Source: DNS Event Category: None Event ID: 4015 Date: 3/7/2010 Time: 10:33:03 AM User: N/A Computer: ADC Description: The DNS server has encountered a critical error from the Active Directory. Check that the Active Directory is functioning properly. The extended error debug information (which may be empty) is "". The event data contains the error. Event Type: Error Event Source: DNS Event Category: None Event ID: 4004 Date: 3/7/2010 Time: 10:33:03 AM User: N/A Computer: ADC Description: The DNS server was unable to complete directory service enumeration of zone .. This DNS server is configured to use information obtained from Active Directory for this zone and is unable to load the zone without it. Check that the Active Directory is functioning properly and repeat enumeration of the zone. The extended error debug information (which may be empty) is "". The event data contains the error. Event Type: Error Event Source: NTDS Replication Event Category: DS RPC Client Event ID: 2087 Date: 3/7/2010 Time: 10:40:28 AM User: NT AUTHORITY\ANONYMOUS LOGON Computer: ADC Description: Active Directory could not resolve the following DNS host name of the source domain controller to an IP address. This error prevents additions, deletions and changes in Active Directory from replicating between one or more domain controllers in the forest. Security groups, group policy, users and computers and their passwords will be inconsistent between domain controllers until this error is resolved, potentially affecting logon authentication and access to network resources.

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• VirtualBox Issue: virtualbox changed my Computer Name's ip address in Windows

  - by suud

  I had installed virtualbox 4.2.2 in Windows 7. My Computer Name is: MY-PC My IP address (using ipconfig /all command) is: 192.168.1.101 My IP is dynamic and I set DNS to google dns (8.8.8.8) When I ping MY-PC, I got this result: Pinging MY-PC [192.168.56.1] with 32 bytes of data: Reply from 192.168.56.1: bytes=32 time<1ms TTL=128 Reply from 192.168.56.1: bytes=32 time<1ms TTL=128 Reply from 192.168.56.1: bytes=32 time<1ms TTL=128 Reply from 192.168.56.1: bytes=32 time<1ms TTL=128 My virtualbox was not running and I expected the ip adress of MY-PC is 192.168.1.101, not 192.168.56.1 Then I run command: nbtstat -a MY-PC and I got this result: VirtualBox Host-Only Network: Node IpAddress: [192.168.56.1] Scope Id: [] NetBIOS Remote Machine Name Table Name Type Status --------------------------------------------- MY-PC <00> UNIQUE Registered WORKGROUP <00> GROUP Registered MY-PC <20> UNIQUE Registered MAC Address = 08-00-27-00-60-B3 Local Area Connection: Node IpAddress: [0.0.0.0] Scope Id: [] Host not found. Wireless Network Connection: Node IpAddress: [192.168.1.101] Scope Id: [] NetBIOS Remote Machine Name Table Name Type Status --------------------------------------------- MY-PC <00> UNIQUE Registered WORKGROUP <00> GROUP Registered MY-PC <20> UNIQUE Registered MAC Address = 94-0C-6D-E5-6D-5D So it seems virtualbox caused this problem. I want to know how to change back my Computer Name's ip address to 192.168.1.101 (or any ip address that set by my internet connection)?

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• QoS for Cisco Router to Prioritize Voice and Interactive Traffic

  - by TJ Huffington

  I have a Cisco 891W NATing Voice and Data to the internet over a 10mbit/2mbit connection. Voice traffic gets degraded when I upload large files. Pings time out as well. I tried to configure a QoS policy but it's basically not doing anything. Voice traffic still degrades when upload bandwidth gets saturated. Here is my current configruation: class-map match-any QoS-Transactional match protocol ssh match protocol xwindows class-map match-any QoS-Voice match protocol rtp audio class-map match-any QoS-Bulk match protocol secure-nntp match protocol smtp match protocol tftp match protocol ftp class-map match-any QoS-Management match protocol snmp match protocol dns match protocol secure-imap class-map match-any QoS-Inter-Video match protocol rtp video class-map match-any QoS-Voice-Control match access-group name Voice-Control policy-map QoS-Priority-Output class QoS-Voice priority percent 25 set dscp ef class QoS-Inter-Video bandwidth remaining percent 10 set dscp af41 class QoS-Transactional bandwidth remaining percent 25 random-detect dscp-based set dscp af21 class QoS-Bulk bandwidth remaining percent 5 random-detect dscp-based set dscp af11 class QoS-Management bandwidth remaining percent 1 set dscp cs2 class QoS-Voice-Control priority percent 5 set dscp ef class class-default fair-queue interface FastEthernet8 bandwidth 1024 bandwidth receive 20480 ip address dhcp ip nat outside ip virtual-reassembly duplex auto speed auto auto discovery qos crypto map mymap max-reserved-bandwidth 80 service-policy output QoS-Priority-Output crypto map mymap 10 ipsec-isakmp set peer 1.2.3.4 default set transform-set ESP-3DES-SHA match address 110 qos pre-classify ! fa8 is my connection to the internet. Voice traffic goes over a VPN ("mymap") to the SIP server. That's why I specified "qos pre-classify" which I believe is the way to classify traffic over the VPN. However even when I ping a public IP while saturating upload bandwidth, the latency is exceptionally high. Is this configuration correct? Are there any suggestions that might make this work for my setup? Thanks in advance.

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• QoS for Cisco Router to Prioritize Voice and Interactive Traffic

  - by TJ Huffington

  I have a Cisco 891W NATing Voice and Data to the internet over a 10mbit/2mbit connection. Voice traffic gets degraded when I upload large files. Pings time out as well. I tried to configure a QoS policy but it's basically not doing anything. Voice traffic still degrades when upload bandwidth gets saturated. Here is my current configruation: class-map match-any QoS-Transactional match protocol ssh match protocol xwindows class-map match-any QoS-Voice match protocol rtp audio class-map match-any QoS-Bulk match protocol secure-nntp match protocol smtp match protocol tftp match protocol ftp class-map match-any QoS-Management match protocol snmp match protocol dns match protocol secure-imap class-map match-any QoS-Inter-Video match protocol rtp video class-map match-any QoS-Voice-Control match access-group name Voice-Control policy-map QoS-Priority-Output class QoS-Voice priority percent 25 set dscp ef class QoS-Inter-Video bandwidth remaining percent 10 set dscp af41 class QoS-Transactional bandwidth remaining percent 25 random-detect dscp-based set dscp af21 class QoS-Bulk bandwidth remaining percent 5 random-detect dscp-based set dscp af11 class QoS-Management bandwidth remaining percent 1 set dscp cs2 class QoS-Voice-Control priority percent 5 set dscp ef class class-default fair-queue interface FastEthernet8 bandwidth 1024 bandwidth receive 20480 ip address dhcp ip nat outside ip virtual-reassembly duplex auto speed auto auto discovery qos crypto map mymap max-reserved-bandwidth 80 service-policy output QoS-Priority-Output crypto map mymap 10 ipsec-isakmp set peer 1.2.3.4 default set transform-set ESP-3DES-SHA match address 110 qos pre-classify ! fa8 is my connection to the internet. Voice traffic goes over a VPN ("mymap") to the SIP server. That's why I specified "qos pre-classify" which I believe is the way to classify traffic over the VPN. However even when I ping a public IP while saturating upload bandwidth, the latency is exceptionally high. Is this configuration correct? Are there any suggestions that might make this work for my setup? Thanks in advance.

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• DNS slow after losing DNS Server

  - by Tim

  We have set up a small Windows Server 2008 R2 network with a domain controller which is also acting as the DNS server for the network (we opted to install DNS when setting up the domain). This network isn't connected to the Internet in any way, so all machines have been configured to use the IP address of the domain controller as their primary DNS and no secondary DNS server has been configured. If we shut down or unplug the network cable from the domain controller, DNS lookups become quite slow and the performance of the network suffers. For example, running a ping command using a hostname takes around 5-6 seconds to resolve the name. I presume this is because it is looking for the DNS, then falling back to some other method of resolving the names as the DNS server is now gone. All the machines have static IP addresses so we are considering just putting all entries in the HOSTS file of each machine. However, it would be nice to have a centralised DNS in case we one day change the IP of one of the machines. Is there a better way to speed this up?

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• QoS basics on a Cisco ASA

  - by qbn

  Could someone briefly explain how to use QoS on Cisco ASA 5505? I have the basics of policing down, but what about shaping and priorities? Basically what I'm trying to do is carve out some bandwidth for my VPN subnets (in an object-group called priority-traffic). I've seen this Cisco QoS document, however configuring shaping and priority-queue don't seem to have any effects in my test. A full download of the linux kernel from kernel.org will boost a ping to a server via VPN sky high. Policing has been successful in passing this test, although it doesn't seem as efficient (I cap non-vpn traffic at 3 of my 4.5 megabits of bandwidth). Am I misunderstanding the results of the test? I think there is some simple concept I'm not grasping here. EDIT: Here is my config thus far (I have 4.5 megabits of bandwidth): access-list priority-traffic extended permit ip object-group priority-traffic any access-list priority-traffic extended permit ip any object-group priority-traffic access-list priority-traffic extended permit icmp object-group priority-traffic any access-list priority-traffic extended permit icmp any object-group priority-traffic access-list non-priority-traffic extended deny ip object-group priority-traffic any access-list non-priority-traffic extended deny ip any object-group priority-traffic access-list non-priority-traffic extended permit ip any any priority-queue outside queue-limit 440 class-map non-priority-traffic match access-list non-priority-traffic class-map priority-traffic match access-list priority-traffic class-map inspection_default match default-inspection-traffic policy-map type inspect dns preset_dns_map parameters message-length maximum 512 policy-map global_policy class inspection_default inspect dns preset_dns_map inspect ftp inspect h323 h225 inspect h323 ras inspect rsh inspect rtsp inspect sqlnet inspect skinny inspect sunrpc inspect xdmcp inspect sip inspect netbios inspect tftp policy-map outbound-qos-policy class non-priority-traffic police input 2500000 police output 2500000 class priority-traffic priority service-policy global_policy global service-policy outbound-qos-policy interface outside

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