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• Virutal Machine loses network connectivity on Hyper V Cluster

  - by Chris W

  We're running a number of VMs on a 6 node failover cluster of blades using Hyper V. We have an intermittent issue (every few days at different times - not a fixed frequency) of VMs losing network connectivity. Console access to the VM suggests all is fine and the underlying blade has normal connectivity. To resolve the problem we either have to re-start the VM or, more usually, we do a live migration to another blade which fires up connectivity and we then migrate it back to the original blade. I've had 3 instances of this happen with a specific VM running on a particular blade however it has happened once with a different VM running on a different blade. All VMs and blades have the same basic setup and are running Windows 2008 R2. Any ideas where I should be looking to diagnose the possible causes of this problem as the event logs provide no help? Edit: I've checked that each blade is running the latest NIC drivers and all seem to be fine. Something that is confusing me - a failover or restart of the VM resolves the issue. Whilst I need to work out the underlying issue that is causing the NICs to hang I'm also concerned that the VM didn't failover to another node which would have solved the outage for me. Is there a way to configure the cluster so that it can tell that the VM guest has lost connectivity and fail it over? As things stand the cluster is assuming that the VM is running happily as I presume Hyper V says everything is great even though there is a problem.

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• fail2ban Error Gentoo

  - by Mark Davidson

  Hi All I've recently setup a new VPS running Gentoo (My first time using the distro so please forgive me is this is a really easy one) and as I've done with other servers installed fail2ban. Setting it up to block the host via iptables, on too many unsuccessful logins with ssh. However I'm getting a strange error that I can't quite solve. When I start fail2ban I get these lines in the error log 2009-11-13 18:02:01,290 fail2ban.jail : INFO Jail 'ssh-iptables' started 2009-11-13 18:02:01,480 fail2ban.actions.action: ERROR iptables -N fail2ban-SSH iptables -A fail2ban-SSH -j RETURN iptables -I INPUT -p tcp --dport ssh -j fail2ban-SSH returned 100 If I try and force a ban these errors show up in the log and the host is not banned 2009-11-13 11:23:26,905 fail2ban.actions: WARNING [ssh-iptables] Ban XXX.XXX.XXX.XXX 2009-11-13 11:23:26,929 fail2ban.actions.action: ERROR iptables -n -L INPUT | grep -q fail2ban-SSH returned 100 2009-11-13 11:23:26,930 fail2ban.actions.action: ERROR Invariant check failed. Trying to restore a sane environment 2009-11-13 11:23:27,007 fail2ban.actions.action: ERROR iptables -N fail2ban-SSH iptables -A fail2ban-SSH -j RETURN iptables -I INPUT -p tcp --dport ssh -j fail2ban-SSH returned 100 2009-11-13 11:23:27,016 fail2ban.actions.action: ERROR iptables -n -L INPUT | grep -q fail2ban-SSH returned 100 2009-11-13 11:23:27,016 fail2ban.actions.action: CRITICAL Unable to restore environment My versions are as follows Linux masked 2.6.18-xen-r12 #2 SMP Wed Mar 4 11:45:03 GMT 2009 x86_64 Intel(R) Xeon(R) CPU E5504 @ 2.00GHz GenuineIntel GNU/Linux net-analyzer/fail2ban-0.8.4 net-firewall/iptables-1.4.3.2 If anyone could shead some light on these errors that would be great, I did wonder if it was a problem with iptables or some kernel modules but I can block an IP if I do. iptables -I INPUT -s 25.55.55.55 -j DROP so makes me think its something a bit more unusual. Thanks a lot in advance

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• Weird mouse/keyboard freezups when using PowerPoint 2007 with IBM/Lenovo docking station

  - by DanM

  I'm not sure what part of my system is responsible for this, but when using PowerPoint, I have problems when trying to resize drawing objects. I'll be dragging the handle and suddenly, the object will deselect and whatever is behind the object will select and start moving around. Next thing I know, the keyboard won't type anymore, and the only way to fix it is to unplug the USB and plug it back in. In case it's hardware related, I'm using an IMB Thinkpad T60P in a docking station. My keyboard is a Microsoft Natural Keyboard Pro. My OS is Windows XP SP3. I've never noticed this happening in anything besides PowerPoint, and I don't know anyone else who has this problem (even people with similar setups). Any ideas what it could be? Edit Well, it looks like I only get the problem if I plug the mouse into my docking station's USB. If I plug directly into the laptop's USB, everything works fine. And, again, this problem is only with PowerPoint. I tried playing with some drawing objects in Word and had no issue no matter where my mouse was plugged in. I should also mention I tried a different mouse (a standard Microsoft corded mouse instead of my Logitech trackball), but that made no difference. So, I don't think it's anything specific with the trackball or the trackball's driver. I tried searching Google but came up empty, so I'm guessing this problem is something unique to my setup. If you have any thoughts or ideas to try, I'd love to hear them.

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• Tomato OS: "memory exhausted" running vi .... how to solve?

  - by Sam Jones

  I have set up tomato (shibby) on an asus RT-N66U router. It works great. I loaded up a few pieces, like transmission and optware. I can run vi, but when I run vi it fails with a "memory exhausted" error, and the terminal session hangs. For reference: If I simply start "vi" it runs fine. But if I specify vi I get the memory exhausted error, even if the file I am opening is just a couple of hundred bytes in size (like fstab). I discovered that my swap partition was not properly set up, so I did that. The swapon command now indicates I really do have a swap: [root@MyRouter samba]$ swapon -s Filename Type Size Used Priority /dev/sda1 partition 32900860 0 1 How can I get vi to work? Thanks! System setup reference information: asus RT-N66U router 2TB usb hard drive partitions on hard drive: Disk /dev/sda: 2000.4 GB, 2000398839808 bytes 255 heads, 63 sectors/track, 30400 cylinders Units = cylinders of 16065 * 4096 = 65802240 bytes Disk identifier: 0xfacbc8ab Device Boot Start End Blocks Id System /dev/sda1 1 512 32900868 82 Linux swap / Solaris /dev/sda2 513 29000 1830638880 83 Linux running samba memory: $ cat /proc/meminfo MemTotal: 255840 kB MemFree: 210980 kB Buffers: 5264 kB Cached: 22768 kB SwapCached: 0 kB Active: 20272 kB Inactive: 11448 kB HighTotal: 131072 kB HighFree: 99868 kB LowTotal: 124768 kB LowFree: 111112 kB SwapTotal: 32900860 kB SwapFree: 32900860 kB Dirty: 0 kB Writeback: 0 kB TIA!

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• Ubuntu 12.04 Server - eth0 1Gbps NIC eth1 10Gbps NIC - all traffic using eth0?

  - by James

  Ubuntu Server 12.04.1 x64 Primary role is an NFS fileserver, for Mac OSX Clients. Hardware: Eth0: 00:19.0 Ethernet controller: Intel Corporation 82579V Gigabit Network Connection (rev 04) Eth1: 07:00.0 Ethernet controller: MYRICOM Inc. Myri-10G Dual-Protocol NIC Config: ifconfig eth0 Link encap:Ethernet HWaddr <MACADDRESS> inet addr:192.168.0.150 Bcast:192.168.0.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:460042020 errors:0 dropped:148 overruns:0 frame:0 TX packets:231906707 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:581431978417 (581.4 GB) TX bytes:259057368617 (259.0 GB) Interrupt:20 Memory:f7d00000-f7d20000 eth1 Link encap:Ethernet HWaddr <MACADDRESS> inet addr:192.168.0.100 Bcast:192.168.0.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:6832208 errors:0 dropped:2 overruns:0 frame:0 TX packets:376 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:513826442 (513.8 MB) TX bytes:33688 (33.6 KB) Interrupt:59 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:507 errors:0 dropped:0 overruns:0 frame:0 TX packets:507 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:45057 (45.0 KB) TX bytes:45057 (45.0 KB) nano /etc/network/interfaces #The loopback network interface auto lo iface lo inet loopback #The primary network interface auto eth0 iface eth0 inet static address 192.168.0.150 netmask 255.255.255.0 network 192.168.0.0 broadcast 192.168.0.255 gateway 192.168.0.1 dns-nameservers 192.168.0.1 8.8.8.8 #second network interface auto eth1 iface eth1 inet static address 192.168.0.100 netmask 255.255.255.0 network 192.168.0.0 broadcast 192.168.0.255 gateway 192.168.0.1 dns-nameservers 192.168.0.1 8.8.8.8 Currently I am using on the OSX clients: nfs://192.168.0.100/Volumes/Storage to mount the NFS share. My problem is why would all the data (and I have checked using various monitoring tools bmon, iftop, glances, etc) be going over the slower connection?? Also, after configuring /etc/network/interfaces with the above setup I always get an error message at bootup something about waiting for network configuration. Are these connected?

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• Using Virtualbox Bridge Networking fails connection from Guest OS to Oracle XE running on Host

  - by Licheng

  I am trying to make a JDBC connection from a VirtualBox Ubuntu Guest OS to an Oracle XE database running o Host. However, the connection is refused. Here are the details of my environment: VirtualBox: 4.1.4 Host OS: Windows 7 Guest OS: Ubuntu server 11.4 Networking mode: Bridged network Oracle XE database running on Host Issue: WebLogic server runs on the Ubuntu virtualbox. It attempts to connect to an Oracle XE database running on the Host OS (windows 7) with listening port 1521. On the Guest OS (Ubuntu), I am able to ping the Host computer from the Guest OS. However, when I configured a JDBC data source on the WebLogic server on the Guest OS to connect to the Oracle XE, connection took a long time, and eventually I received an "IO Exception: The Network Adapter could not establish the connection". When I tried "telnet host-ip 1521", no connection was established. With Bridge networking, I can make bi-directional connections between the host and the guest OS (e.g. connection through ssh and ftp). Is there anything I missed in the setup of Bridge networking and the guest/host OS? Note that I was able to make the same connection within a normal networking environment (i.e. not using virtual box). I am not sure whether Bridge networking is a good option for the work described above. Should I use host-only networking mode? If so, any specific configurations I need to perform? I read through the Virtual box document on setting up the host-only network, however, it lacks of details. I followed the procedures described in the manual, and couldn't even connect to the host. Could some experts here enlighten me on this issue? Much appreciated. Licheng

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• Routing multiple static IPs from ISP at the cable modem?

  - by Jakobud

  I'm taking over IT responsibilities for a previous IT guy. We have a 50mb cable modem connection from Comcast along with 5 static IP addresses: XXX.XXX.XXX.180 XXX.XXX.XXX.181 XXX.XXX.XXX.182 XXX.XXX.XXX.183 XXX.XXX.XXX.184 We are in the process of replacing our firewall machine. Currently the firewall box is the only thing connected to the cable modem. However the cable modem has multiple ethernet ports on it, similarly to a router. I have assembled a new firewall machine and its time to start testing and configuring it. So that means that I also need it plugged into the cable modem (remember it has multiple ethernet ports on it). So now with multiple computer plugged into the cable modem, how does the cable modem know where to route the traffic? If some request on the internet is made to XXX.XXX.XXX.181, which goes to our cable modem, how does the cable modem know which connected computer that traffic is supposed to be sent? Looking at the web interface for the cable modem, there doesn't seem to be anything special setup on it with regards to routing or NATing IP addresses. Is that because when there is only one computer connected to the modem, all traffic is sent to it by default? Now that I am going to (temporarily) have multiple computers plugged into the cable modem, do I need to specify routing or NAT rules on the modem itself? I am going to speak to Comcast about this next, but I figured I'd ask here first just so I can get a better grasp on how this type of thing generally plays out.

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• ISA Server 2006 SSL Certificate Dilemma

  - by JohnyD

  I'm making so great headway in offering our services over https with help from a Go Daddy certificate, later to be upgraded to Thawte SSL123 certs. But, I've just run into one whopper of a problem. Here's my setup: I run an ISA 2006 firewall. Our web services are distributed over 2 servers. One is Windows 2000 (www.domain.com) and the other is Windows 2003 (services.domain.com). So, I'll need to purchase 2 certs for both www and services, import them into IIS6 on their respective machines, then export them with the primary key (making sure to Include all certificates in the certification path if possible... that had me stumped for a while), and then to finally import them into ISA's local computer Personal store. The problem I've just run into is that I have separate firewall rules for services.domain.com and www.domain.com... because requests need to be forwarded to different web servers. Each of these firewall rules use the same httplistener. I have just found out that you can only use 1 certificate per httplistener. To make matters worse you can only have a single httplistener per ip / port. Is this correct? I can only use a single certificate for a single ip address? This would seem to be a severe limitation. Am I wrong? If I'm not then I've got a whole lot more work ahead of me as I'll have to set up extra ip's, add them to the firewall's network interface, create new listeners using that ip, etc... Can someone please confirm that I'm doing this correctly / incorrectly? Once I got my head wrapped around it all it seemed easy... then this. Thanks in advance.

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• Can a wifi AP act as a client, and a server at the same time?

  - by nbolton

  I feel this is SF worthy (as opposed to SU) as I go into a bit of detail on gateways/routing. Here's my ideal setup (if possible) -- there is a wifi network (lets call it bob's) with which I want access to, but I have a few other computers on my network which I want to keep behind a firewall. So I was thinking of buying a wireless access point so that I could set it up to connect to bob's network from the AP, and then from my server, connect to the AP via ethernet. So that's the first bit. Second part is that I want to have my own private wifi network off the back of this; can I then tell the AP to serve a new network called foobar. When I say private network, I mean that my server is actually a Debian linux install with routing configured (and I also do some QoS stuff on, etc). So ideally, I'd like all the clients on the private network to be behind the server in terms of routing. However, if the private clients connect to the server via wifi, then aren't they exposed to the "public" network? That is, if someone is savvy enough to scan for my IP range. Also, to do routing I'd need to connect two ethernet cables between the server and the AP (because you can't do routing/QoS on virtual devices) -- which isn't a problem really; but I'm not sure whether the AP will allow me to separate the public and private LANs. Or, as well as the AP, am I better getting a wifi-to-ethernet adapter for the server? I could use a wifi usb, but this can be tricky to set up on headless linux; plus the signal strength is a bit lousy. If this question is a bit vague/spurious in places, please comment and I will explain in more detail.

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• authbind, privbind or iptables REDIRECT (port 80 to 8080)?

  - by chris_l

  Hi, I'd like to run Glassfish v3 as a non-privileged user on Linux (Debian), but make it available on port 80. I'm currently doing this with iptables: iptables -t nat -I PREROUTING -p tcp -d x.x.x.x --dport 80 -j REDIRECT --to-port 8080 This works, but I wonder: If this has any significant performance impact compared to binding directly to port 80 If I could make a similar setup also work for HTTPS (or if that must run on 443) If there's a way to avoid other users from binding to port 8080 (in case my server crashes) - maybe block that port permanently to other users somehow? ...or if I should use authbind/privbind instead? Problem: I couldn't make it work with authbind or privbind so far. For authbind, I edited asadmin's last line to: exec authbind --deep "$JAVA" -Djava.net.preferIPv4Stack=true -jar ... For privbind: exec privbind -u glassfish "$JAVA" -Djava.net.preferIPv4Stack=true -jar ... (Only) with these settings, I can successfully perform a create-domain --domainport 80. This proves, that authbind and privbind actually work (the authbind version of the script is called by the glassfish user; the privbind version is called by root of course). However, in both cases I get the following exception, when starting the domain (start-domain): [#|2010-03-20T13:25:21.925+0100|SEVERE|glassfishv3.0|javax.enterprise.system.core.com.sun.enterprise.v3.server|_ThreadID=11;_ThreadName=FelixStartLevel;|Shutting down v3 due to startup exception : Permission denied: 80=com.sun.enterprise.v3.services.impl.monitor.MonitorableSelectorHandler@1fc25e5|#] I haven't found a solution for that yet (after searching the web, it seems, that this isn't so easy?) But maybe, the solution with iptables is good enough - what do you think? Thanks, Chris

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• Outlook users connected to exchange can email from other email accounts

  - by Sherriffwoody

  We have found an issue on our systems whereby an outlook user (both 2007 and 2010) connected to our Exchange server (2007) can send emails as other users using the following steps Within Outlook Click <New Email> Select the <From> button to show a list of accounts outlook contains, but it also shows the option Select<Other Email Address>. This brings up a small dialog box with another button which when selected allows the user to select an email from their contacts or the Active Directory. The user in most cases can select any email within the Active Directory and send an email as if it were coming from that selected email. It seems not everyone has this ability and I'm guessing it is something to do with settings in exchange or AD(version 6) or is there a group policy that can be implemented to stop users being able to do this. We have no idea what allows this and I have failed to find anything using Dr Google. No one has setup delegates within outlook but it does seem to be something similar? Does anyone know how to lock this down? Thanks in advance

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• Node.js, Nginx and Varnish with WebSockets

  - by Joe S

  I'm in the process of architecting the backend of a new Node.js web app that i'd like to be pretty scalable, but not overkill. In all of my previous Node.js deployments, I have used Nginx to serve static assets such as JS/CSS and reverse proxy to Node (As i've heard Nginx does a much better job of this / express is not really production ready). However, Nginx does not support WebSockets. I am making extensive use of Socket.IO for the first time and discovered many articles detailing this limitation. Most of them suggest using Varnish to direct the WebSockets traffic directly to node, bypassing Nginx. This is my current setup: Varnish : Port 80 - Routing HTTP requests to Nginx and WebSockets directly to node Nginx : Port 8080 - Serving Static Assets like CSS/JS Node.js Express: Port 3000 - Serving the App, over HTTP + WebSockets However, there is now the added complexity that Varnish doesn't support HTTPS, which requires Stunnel or some other solution, it's also not load balanced yet (Perhaps i will use HAProxy or something). The complexity is stacking up! I would like to keep things simpler than this if possible. Is it still necessary to reverse proxy Node.js using Nginx when Varnish is also present? As even if express is slow at serving static files, they should theoretically be cached by Varnish. Or are there better ways to implement this?

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• Which apache/mysql/php package is best for windows?

  - by crosenblum

  I have tried appservnetwork, was the best so far, but I haven't seen them do an update in ages, EasyPHP is just slow to load always. Wamp and Xamp, all put in their description that is not for production. I do not plan to host publicly this site or site's I am working on. But I do want a fast loading apache/mysql/php server for development purposes. I used to really like WLMP, which is Lighttpd for Windows, but that project seems unupdated or abandoned. I refuse to use IIS, but i have no desire to get into any wars over it. I run windows xp sp3 at my home pc. I will need to have a web server setup for professional work, as well as some fun websites I am working on. I just want it fast enough, so i can run it via localhost, and not take forever to load in the browser. Thank you... I plan mostly do php programming and perhaps coldfusion via this.

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• Two hosting providers running simultaneously... possible / not possible? good practice / unnecessary?

  - by user29600

  For the sake of their reputation, I won't mention the names. But I'll just use: Business I worked for previously - ABC Web Dev Hosting company they used - XYZ Hosting I recently found out that XYZ Hosting had some sort of incident where they ended up losing a lot of their client's data - including ABC Web Dev's. ABC Web Dev was able to recover some of their customer's websites, after pulling them from their local development computers and putting them up on another hosting provider. They ended up losing a lot of clients because of it and their reputation ruined. I'm starting my own web dev company and I don't want to run into this same issue. I'm planning on using Rackspace but, although they are a great company, according to wikipedia they still have had downtime in their past. I thought it might be a good idea to try to run two providers at once, to ensure that if anything happened in one the websites would still be live because of the other. I know the websites would have to be pulling from one server at all times, but if there's a way to redirect requests to the second server if the first one is down that would solve my issue. As a note, we will have a staging environment setup locally which will allow for quick recovery if a provider did have any issues, however I'd like to avoid any downtime at all if possible. So my questions are: Has anyone tried running two providers simultaneously? Would this be considered good practice or am I going too far? Is there really any way to run two simultaneously where one server acts as a backup?

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• Traffic Shaping using tc

  - by Simon

  Hi guys, I have a 1.5 Mbit/s link that i want to share with 150 users. My setup is the following: Linux box with 3 NICs eth0 - public ip eth1 - subnet A - 50 users (static ips) eth2 - subnet B - 100 users (via dhcp) I am using squid as a transparent proxy on port 3128. dhcp server using ports 67 and 68. I was creating, but I think packets are not going to the right queues #!/bin/bash DEV=eth0 RATE_MAIN=2048kbit CEIL_MAIN=2048kbit BURST=1b CBURST=1b RATE_DEFAULT=1024kbit CEIL_DEFAULT=$CEIL_MAIN PRIO_DEFAULT=3 RATE_P2P=1024Kbit CEIL_P2P=$CEIL_MAIN PRIO_P2P=4 RATE_IND=32kbit CEIL_IND=$CEIL_DEFAULT tc qdisc del dev $DEV root tc qdisc add dev $DEV root handle 1: htb default 30 tc class add dev $DEV parent 1: classid 1:1 htb rate $RATE_MAIN ceil $CEIL_MAIN tc class add dev $DEV parent 1:1 classid 1:10 htb rate $RATE_DEFAULT ceil $CEIL_MAIN burst $BURST cburst $CBURST prio $PRIO_WEB ## some other sub class for p2p other traffic tc class add dev $DEV parent 1:1 classid 1:20 htb rate $RATE_P2P ceil $CEIL_P2P burst $BURST cburst $CBURST prio $PRIO_P2P $IPS_NET1=50 $IPS_NET2=100 let $IPS=$IPS_NET1+$IPS_NET2 for ((i=1; i<= $IPS; i++)) do let CLASSID=($i+100) let HANDLE=($i+100) tc class add dev $DEV parent 1:10 classid 1:$CLASSID htb rate $RATE_IND ceil $CEIL_IND tc qdisc add dev $DEV parent 1:$CLASSID handle $HANDLE: sfq perturb 10 done ## Generate IP addresses ## IP_ADDRESSES="" # Subnet A BASE_IP=10.10.10. for ((i=2; i<=$IPS_NET1+1; i++)) do TEMP="$BASE_IP$i" IP=ADDRESSES="$IP_ADDRESSES $TEMP" done # Subnet B BASE_IP=192.168.0. for ((i=2; i<=$IPS_NET2+1; i++)) do TEMP="$BASE_IP$i" IP_ADDRESSES="$IP_ADDRESSES $TEMP" done ## FILTERS ## j=1 U32="tc filter add dev $DEV protocol ip parent 1:0 prio $PRIO_DEFAULT u32" for NET in $IP_ADDRESSES; do let CLASSID=($j+100) $U32_DEFAULT match ip src $NET/32 flowid 1:$CLASSID $U32_DEFAULT match ip dst $NET/32 flowid 1:$CLASSID let j=j+1 done Can you guys help me figure out what's wrong with it? basically I want my classes to be 1:1 (1.5 Mbit ) 1:10 (1024 Kbit) 1:20 (1024 Kbit) (200 ips each with 32 kbit)

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• Resolving "JBoss Web Console is Accessible to Unauthenticated Remote Users" vulnerability

  - by IAmJeff

  Our security team has determined there is a vulnerability in one of our systems. We are using version JBoss 5.1.0GA on RHEL 5.10. Vulnerability description: JBoss Web Console is Accessible to Unauthenticated Remote Users Yes, this looks familiar. Refer to Question 501417. I do not find the answer there complete. Can someone (or multiple someones) answer Does a newer version of JBoss fix this vulnerability? Are there links describing, in more detail, manual modification of JBoss configuration files to resolve the issue? Are there others options to remediate this vulnerability? Why don't I find the other answer complete? I'm not at all familiar with JBoss, so this answer seems a bit too simple. The web-console.war contains commented-out templates for basic security in its WEB-INF/web.xml as well as commented-out setup for a security domain in WEB-INF/jboss-web.xml. Just uncomment those basic security blocks and restart? Is there anything else I need to include? This seems generic. Do I need to include anything about my environment, such as absolute paths, etc.? Am I making this too complicated?

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• Vim: Custom Folding function done, custom highlighting required

  - by sixtyfootersdude

  I have defined a function in vim to properly indent folds. Ie so they look like this: Unfolded this is text also text indented text indented text not indented text folded with default function this is text also text +-- 2 lines: indented text ---------------------------- not indented text folded with my new function this is text also text ++- 2 lines: indented text ---------------------------- not indented text The only problem is the the highlighting is still like this: folded with my new function (highlighting shown with tag) this is text also text <hi> ++- 2 lines: indented text ----------------------------</hi> not indented text I would like the highlighting to start at the ++ and not at the beginning of the line. I have looked in the vim manual but could not find anything like that. One so-so solution I found was to make the background black. highlight Folded ctermbg=black ctermfg=white cterm=bold But this make folds less visible. I have tried several variations of: syn keyword Folded lines syn region Folded ... But I don't think that this is the way that folds are selected. Can anyone offer a suggestion? By the way this is my function to indent the folds: set foldmethod=indent function! MyFoldText() let lines = 1 + v:foldend - v:foldstart let ind = indent(v:foldstart) let spaces = '' let i = 0 while i < ind let i = i+1 let spaces = spaces . ' ' endwhile let linestxt = 'lines' if lines == 1 linestxt = 'line' endif return spaces . '+' . v:folddashes . ' '. lines . ' ' . linestxt . ': ' . getline(v:foldstaendfunction endfunction au BufWinEnter,BufRead,BufNewFile * set foldtext=MyFoldText() By the way thanks to njd for helping me get this function setup.

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• Auto load balancing two node Cluster Hyper-v 2008 R2 enterprise?

  - by Kristofer O

  My setup is a 2 node cluster with 72GB ram each and a ~10TB MD3000i Iscsi SAN. I have about 30VMs running I keep about 15 on either server. I do a live migration to the other server if I need to run updates or whatever... Either one of the servers is able of running all VM if needed, but the cpu is pretty high. Here's my issues. I know Hyper-v has a limit of a single Live-migration at a time. But Why doesn't it queue them up to move one at a time? If I multi select I don't get the option to live migrate a one at a time. OR if I'm in the process of Migrating one it will give me an error that it's currently migrating a VM... Is there a button I missed that will tell a Node that it needs to migrate all the VMs elsewhere? Another question, does anyone know whats the best way to load balance VMs based on CPU and/or network utilzation. I have some VMs that don't do much. and some that trash the CPU or network. I'd like to balance it out on both servers if at all possible. and Is there any way to automate it? last question... If I overcommit my Cluster is there a way to tell the cluster that I want certian VMs the be running and to savestate other VMs based on availible system resources? Say when my one node blue screens and the other node begins starting the VMs up. I want the unimportant ones to shutdown or savestate so the important ones can stay running or come back online. Thanks just for reading all that. Any help would be great.

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• Birt on Tomcat unable to find JARs

  - by LostInTheWoods

  First, my setup: BiRT Runtime: 3.7.2. Ubuntu 10.04 Tomcat 6 Sun Java 1.6.0 I have a jar file I want to deploy onto the Tomcat server so it is usable by the runtime, so I placed the jar file in /var/lib/tomcat6/webapps/birt/WEB-INF/lib. As I understand it this is the default location for JAR files that are going to be used by a BiRT report. But the jar file is not accessible by the report that is trying to call it. In the BiRT logs I see: Error evaluating Javascript expression. Script engine error: ReferenceError: "DynDSinfo" is not defined. (/report/data-sources/oda-data-source[@id="54"]/method[@name="beforeOpen"]#20) Script source: /report/data-sources/oda-data-source[@id="54"]/method[@name="beforeOpen"], line: 0, text: __bm_beforeOpen() org.eclipse.birt.data.engine.core.DataException: Fail to execute script in function __bm_beforeOpen(). Source: "DynDSinfo" is the class I am trying to reference.. and now for the kicker... this works fine on Tomcat6 on Windows 7. The same files in the same places. So is there some additional configuration or some environmental variable that needs to be set, or something different on the Linux (Ubuntu) platform? All help or ideas gratefully received, Stephen

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• Whitelist IP from google-authenticator in sshd pam

  - by spudwaffle

  My Ubuntu 12.04 server uses the google-authenticator pam module to provide two step authentication for ssh. I need to make it so that a certain IP does not need to type the verification code. The /etc/pam.d/sshd file is below: # PAM configuration for the Secure Shell service # Read environment variables from /etc/environment and # /etc/security/pam_env.conf. auth required pam_env.so # [1] # In Debian 4.0 (etch), locale-related environment variables were moved to # /etc/default/locale, so read that as well. auth required pam_env.so envfile=/etc/default/locale # Standard Un*x authentication. @include common-auth # Disallow non-root logins when /etc/nologin exists. account required pam_nologin.so # Uncomment and edit /etc/security/access.conf if you need to set complex # access limits that are hard to express in sshd_config. # account required pam_access.so # Standard Un*x authorization. @include common-account # Standard Un*x session setup and teardown. @include common-session # Print the message of the day upon successful login. session optional pam_motd.so # [1] # Print the status of the user's mailbox upon successful login. session optional pam_mail.so standard noenv # [1] # Set up user limits from /etc/security/limits.conf. session required pam_limits.so # Set up SELinux capabilities (need modified pam) # session required pam_selinux.so multiple # Standard Un*x password updating. @include common-password auth required pam_google_authenticator.so I've already tried adding a auth sufficient pam_exec.so /etc/pam.d/ip.sh line above the google-authenticator line, but I can't understand how to check an IP adress in the bash script.

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• How powerful of a PC do you need to edit HD videos?

  - by Xeoncross

  I have a Core2Quad Q8200 (2.3GHz) with 4GB of RAM, a 512MB PCIe video card, and a SATA-2 HD. Yet it still isn't fast enough to edit 720i/p video in Sony Vegas or Adobe Premiere/Aftereffects. My RAM usage never peaks over 1.6GB, but my CPU cores make it to 95% quick! Right now the preview panes in all these programs lag to bad to actually work on the videos. I get to see 1-3 frames every second or two! So how fast do I have to go? At what point will my CPU be fast enough to actually edit these videos? I have to assume that regular people and their regular sub $2k computers can actually work with this footage. Another way to answer this is, how fast is the PC you used to edit videos? Update: I'ts worth noting that now that I have Adobe Pre/AF CS4 I am more interested in getting that working than my older Vegas 6. If you didn't have to re-run RAM preview every, single, time you made one change it would be my answer. But since I like to test many filters and effects before choosing one - I have to re-render a 1-sec section of footage over-and-over and it drives me nuts waiting. Perhaps a motherboard with Dual Xeon chips or something would be able to handle this. It would probably be as much as a dual-crossfire setup and would also speed up other applications.

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• Raid-1 Western Digital Green AARS, cloning and WD Align Utility

  - by Jaguar

  Hello all, My current setup runs on top of 2x Western Digital 2500KS drives on Raid-1, using the motherboard's 780G raid controller, on WinXP. Everything is fine, but the drives are a bit noisy. I am considering buying 2x WD6400AARS disks which are the 640GB slower 'green' drives, but also feature the Advanced Formatting 4KB sectors. This means that for WinXP the partition will have to be aligned to work properly, else there is a performance penalty. There are 2 questions here: The Green drives from WD are all slower and are (according to WD) susceptible to drop-out's from the controller. Has anyone any experience in this matter? Is there a possibility the controller will drop a drive? If so, can i do anything about it? Secondly, western digital gives a utility to perform the alignment on the partition. The thing is, will the utility see the drives in question as the operating system only sees 1 logical disk? I will be making the transition using a cloning tool (most probably norton ghost) unless i don't find a solution or a clear answer, in which case i'll just buy a win 7 license and make a clean install... thx in advance

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• Cygwin, ssh, and git on Windows Server 2008

  - by Paul

  Hi everyone. I'm trying to setup a git repository on an existing Windows 2008 (R2) server. I have successfully installed Cygwin & added git and ssh to the packages, and everything works perfectly (thanks to Mark for his article on it). I can ssh to localhost on the server, and I can do git operations locally on the server. When I try to do either from the client, however, I get the "port 22, Bad file number" error. Detailed SSH output is limited to this: OpenSSH_4.6p1, OpenSSL 0.9.8e 23 Feb 2007 debug1: Connecting to {myserver} [{myserver}] port 22. debug1: connect to address {myserver} port 22: Attempt to connect timed out without establishing a connection ssh: connect to host {myserver} port 22: Bad file number Google tells me that this means I'm being blocked, usually, by a firewall. So, double-checked the firewall settings on the server, rule is there allowing port 22 traffic. I even tried turning off the firewall briefly, no change in behavior. I can ssh just fine from that client to other servers. The hosting company swears that there's no other firewalls blocking that server on port 22 (or any other port, they claim, but I find that hard to believe). I have another trouble ticket into them, just in case the first support person was full of it, but meanwhile I wanted to see if anyone could think of anything else it can be. Thanks, Paul

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• nginx+mysql5 loadtesting configuration strangeness

  - by genseric

  i am trying to setup a new server running on debian6 and trying to make it work smooth under load. i ve used a wordpress site as a test object, and tried the configurations on http://blitz.io. when i increase the mysql max_connections from 50 to 200 lots of timeouts start to occur. but on 50 , no timeouts and pretty well response times. nginx configuration is fine , i tuned the config so i dont see errors. so i presume it's related to the other configuration options of my.cnf . i read some about options but still cant find what max_connections problem is all about. btw, the server has 16gb of ram and a fine i7 cpu. here is the current my.cnf [client] port = 3306 socket = /var/run/mysqld/mysqld.sock [mysqld_safe] socket = /var/run/mysqld/mysqld.sock nice = 0 [mysqld] wait_timeout=60 connect_timeout=10 interactive_timeout=120 user = mysql pid-file = /var/run/mysqld/mysqld.pid socket = /var/run/mysqld/mysqld.sock port = 3306 basedir = /usr datadir = /var/lib/mysql tmpdir = /tmp language = /usr/share/mysql/english skip-external-locking bind-address = 127.0.0.1 key_buffer = 384M max_allowed_packet = 16M thread_stack = 192K thread_cache_size = 20 myisam-recover = BACKUP max_connections = 50 table_cache = 1024 thread_concurrency = 8 query_cache_limit = 2M query_cache_size = 128M expire_logs_days = 10 max_binlog_size = 100M [mysqldump] quick quote-names max_allowed_packet = 16M [mysql] #no-auto-rehash # faster start of mysql but no tab completition [isamchk] key_buffer = 16M thanks in advance. i asked this question on SO but it's closed as off topic so i believe this is a SF question.

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• Running mod_php and suPHP same time

  - by BHare

  I recently went from Debian Lenny with 5.2.x and was able to use mod_php for any php files that were not located in /home/ and suPHP for all the php files that were located in /home/. I did this because I needed a default php.ini (given me all features of php) for my websites in /var/www/ and I didn't want to have to change the owner of all the .php files from root. I also had a default php.ini for all the /home/ php files without dangerous features. This was I had setup: <IfModule mod_suphp.c> <Directory /home/> AddType application/x-httpd-php .php .php3 .php4 .php5 suPHP_AddHandler application/x-httpd-php suPHP_Engine on suPHP_ConfigPath /home/shared/ </Directory> </IfModule> This was working perfect, but recently I upgraded to PHP to 5.3.5 from dotdeb (Lenny has no official php 5.3) . This had weird issues on lenny such as not display errors correctly and little tid bits. So I decided to upgrade from lenny to squeeze. Uninstalled php (along with it came suphp) and reinstalled with the new source. I now have 5.3.3-7 with Debian Squeeze but I cannot get mod_php and suPHP to run at the same time anymore. mod_php will always work and there are no errors in apache2 or suphp logs. If I disabled mod_php then suPHP will work. Is there thing I am doing wrong?

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