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• Setting up SSL on Nginx, Passenger, Sinatra

  - by 12preschph

  I have a Sinatra app that runs both on locally and on Heroku. When visiting my site over HTTPS across Heroku, it will indeed work as Heroku provides this by default. How can I set up SSL to work on my localhost machine? I will enable my Sinatra app to only allow secure connections so I need to test this both in development and production. Currently, I am running the following locally: SERVER= nginx/1.6.0 + Phusion Passenger 4.0.42 Also, where is my nginx folder? I don't have it installed in the normal location (Ubuntu) so this must come custom with Passenger?

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• cisco vpn client randomly disconnects with pfSense

  - by Andre

  My network has two gateways, one is a pfSense box that everyone uses. The other one is a TP-Link firewall essentially for tests. Some machines inside my network need to access a VPN through the Cisco VPN client. If one of those machines is using the pfSense box as the gateway, I experience random connection drops on the VPN. If I am using the TP-Link gateway that doesn't happen. I've tried changing the MTU in the pfSense box and that improved things a little bit but didn't really solve the problem. I also followed the guidelines for traffic shaping in pfSense and the connections still drop quite often. Ideas?

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• Windows 7: how can I add an IP range in the "route" command?

  - by KeyStroke

  Hi, I'm using two network connections, and I tried using the "route" command so that when I access a specific internal IP on my LAN, it would use connection 1, anything else would go normally through connection 2 (which doesn't have access to my LAN). The problem is I have a bunch of internal IP's that I need to access, and the "route" command doesn't seem to allow me to add an IP range instead of specific IP. And connection 1 doesn't have internet access, so I can't use it as my default connection. Any idea how this can be solved? Your help is appreciated

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• Best idea dataserver serving small pictures 40 ko

  - by Nicolas Manzini

  I'm designing the server structure for my application in case things go well. I have one server DB connected to multiple server who process connections. All those with lots of RAM and fast processors. (still looking for a way to use the multithread because now it's dumb apache php... so loooots of ram needed). Upon an answer from those servers, the client can then connect to another server to retrieve pictures using the address he previously got from the db. Is it a good idea to have one database server with let's say nginx and ssd disk having to send all pictures to everybody? or should I have multiple server accessing to a shared ssd disk drive or multiple disk updating each other? Also should I put a lot of RAM on the database server? because probably there wont be a picture more popular than another.

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• Windows 7 - XP Mode - Apache

  - by Howard

  I've setup Virtual PC and XP Mode on my Windows 7 Pro. Using Apache 2.0.52 I have no problems having my website up and running on the Windows 7 machine. But Under VPC/XP Mode the best I can do is Localhost mode. What do I need to do to enable http connections? I need the XP Mode as besides the website I also run a Web BBS and a Dos based (via telnet) BBS. Some of the apps in the Dos BBS just won't work under 64 bit, no matter what setting (capability) are used. Thanks in advance...

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• Micro Btx Motherboard Replacement.

  - by Judy

  I got the Vundo virus that took out the mobo and hard drive on my Gateway GT5220. Is there a replacement that will work? I'm willing to keep XP. I want to fix it the cheapest way possible. The mobo is a NVIDIA GeForce 6150 AM2 microBTX with primary IDE and 4 SATA connections. I want to use a new SATA as my primary, but would like to be able to connect my old IDE drives to transfer my pictures from them to the new drive. I would appreciate any help. Thanks!

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• Using a Dell PowerConnect to set up load balancing/redundancy, 1 switch 2 routres 2 private wan link

  - by MarianoC

  Hi, We have different locations connected by two different WAN providers. Each site has a dell powerConnect 6224 and two cisco routers with the WAN connections (we don’t have access to router admin). The 6224 connects to each cisco LAN port and to our LAN backbone. We would like the 6224 provide the ip gateway address and load balance and support redundancy, if one of the routes fail. Is this possible?. We can't find any samples on doing this and we have tried with no success. Any help or link to documentation regarding this, will be greatly appreciated. Thanks, MarianoC

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• Is visiting HTTPS websites on a public hotspot secure?

  - by Calmarius

  It's often said that HTTPS SSL/TLS connections are encrypted and said to be secure because the communication between the server and me is encrypted (also provides server authentication) so if someone sniffs my packets, they will need zillions of years to decrypt if using brute force in theory. Let's assume I'm on a public wifi and there is a malicious user on the same wifi who sniffs every packet. Now let's assume I'm trying to access my gmail account using this wifi. My browser does a SSL/TLS handshake with the server and gets the keys to use for encryption and decryption. If that malicious user sniffed all my incoming and outgoing packets. Can he calculate the same keys and read my encrypted traffic too or even send encrypted messages to the server in my name?

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• TFS 2010 migration from one server to another

  - by Kabir Rao

  We have followed- http://msdn.microsoft.com/en-us/library/ms404869(v=vs.100).aspx every steps of this extremely poorly worded article. We are not able see Dashboards of SharePoint projects. In some cases(mostly scrum projects, i guess), i get "The Webpage can not be found". In other cases- Unable to refresh data for a data connection in the workbook. Try again or contact your system administrator. The following connections failed to refresh: TfsOlapReport Any help would be very much appreciated.

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• Installing raid controller forces reinstall of Windows Server 2008

  - by Tyler

  So, I've tried two different RAID controllers that have external SATA connections on my Server 2008 machine. I can install the hardware, boot into Windows, install the drivers and reboot again. No problems. However, as soon as I try to use eSATA-connected drives and reboot something happens to the Windows install and I can no longer boot into Windows. I tried repairing from the command line, and the end result is that repair console tells me I have 0 Windows installations (?). I end up having no choice but to reinstall Windows to get back on track. I must be doing something fundamentally wrong here, but I don't know what :(

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• How can I measure TCP timeout limit on NAT firewall for setting keepalive interval?

  - by jmanning2k

  A new (NAT) firewall appliance was recently installed at $WORK. Since then, I'm getting many network timeouts and interruptions, especially for operations which would require the server to think for a bit without a response (svn update, rsync, etc.). Inbound SSH sessions over VPN also timeout frequently. That clearly suggests I need to adjust the TCP (and ssh) keepalive time on the servers in question in order to reduce these errors. But what is the appropriate value I should use? Assuming I have machines on both sides of the firewall between which I can make a connection, is there a way to measure what the time limit on TCP connections might be for this firewall? In theory, I would send a packet with gradually increasing intervals until the connection is lost. Any tools that might help (free or open source would be best, but I'm open to other suggestions)? The appliance is not under my control, so I can't just get the value, though I am attempting to ask what it currently is and if I can get it increased.

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• How to show what proxies/firewalls are enabled on Windows XP?

  - by Stephen Melrose

  Hi, I'm trying to fix a Windows XP PC that is having a strange problem. The computer can't seem to connect to the internet, even though an internet connection is present. The router and internet is working fine as I've connected a laptop to it via LAN and wireless and both worked fine. The PC in question is connected to the router as it has an IP from the DHCP. The problem is I can't connect to nor ping any internet address from the PC. I can't even connect to the router admin itself. I've tried both LAN ports in the PC, same problem and both. I'm assuming there's a proxy or firewall on the PC stopping the connections, I just don't know how to find them or see which one is causing the issue. So my question is how do I on Windows XP display the system proxy settings and/or any firewalls that are running? Cheers.

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• Manually forcing TCP connection to retry

  - by Vi.

  I have a TCP connection (SSH session to some computer for example) Network suddenly goes down and drops all packets (disconnected cable, out of range). TCP resends packets again and again, retrying with increasing delays. I see the problem and plug the cable back (or restore network somehow). TCP connection finally successfully resends some packet and continues. The problem is that I need to wait for a some timeout on point 5. I want to use my opened SSH session now and not wait for 5-10 seconds until it finds out that connection is working again. How to force all TCP connections to resend data without delays in GNU/Linux?

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• %sessionname% returns incorrect session name

  - by Samuel Walker

  I have a virtualised Windows XP SP3 machine, which I am connecting to over Remote Desktop. One of my scripts needs to use the %sessionname% variable. However this returns incorrect information. C:\>%sessionname% constantly returns RDP-Tcp#5, instead of the value for the currently connected session (RDP-Tcp#35 or similar), as shown in Task Manager This causes my scripts to contain incorrect information. What can I do to resolve this? Edit Further Information: A restart appears to solve the problem for the first connection, but then subsequent connections have the numbers fall out of sync again.

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• No remote access to PostgreSQL db

  - by gattol

  i'm stuck in connecting to a PostresSQL database from remote host. The server is accepting incoming connections on port 5432 and i've configured pg_hba.conf like this: local all all md5 host all all 0.0.0.0/0 md5 and the postgresql.conf like this: listen_addresses = '*' port = 5432 max_connections = 100 I don't have any problem accessing from local but when i try to connect via psql with something like this: psql -U myuser -h hostname db_name I get this error: psql: FATAL: no pg_hba.conf entry for host "87.zz.yy.xxx", user "myuser", database "db_name", SSL off I also tried to put the host 87.zz.yy.xxx in the pg_hba.conf file without success.

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• Wifilink 5100 AGN mass update

  - by ripwads

  We are using a Meru enterprise wireless network with 180 APs. Recently, many users connections are dropping frequently. After much troubleshooting, we have determined much of the trouble is due to some settings in the advanced properties of the wireless nic on our notebooks. Now we want to send out the changes in a Zenworks bundle, but I cannot find these settings in the registry or anywhere we might be able to send out as a remote package. Does anyone know where to find these settings for an Intel wifilink 5100 card other that the NIC properties itself? We really do not want to manually configure 600 notebooks.

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• Need help translating rate limiting iptables rules to Puppet format

  - by geoffroy

  I use Puppet Iptables module to manage Iptables rules on my machine. I'd like to implement to rate limit failed SSH connections as described here : Hundreds of failed ssh logins iptables -A INPUT -p tcp --dport 22 -m recent --update --seconds 60 --hitcount 5 --name SSH --rsource -j DROP iptables -A INPUT -p tcp --dport 22 -m recent --set --name SSH --rsource -j ACCEPT Is it possible to translate it to Puppet syntax, such as firewall { '015 drop 5 failed attemps to connect to SSH in a minute ': proto => 'tcp', port => 22, action => 'drop', // what are the other paramters ? } Any help welcome. Best regards Geoffroy

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• Apache httpd + FreeTDS hangs until restarted

  - by Jordan Reiter

  Every so often requests to a Linux server (say, linux.example.org) where the web app (Django) pulls in data from a SQL Server database via FreeTDS will hang. Requests on other servers pointing to the database still work, as do requests on linux.example.org that use local MySQL databases. Only the server plus FreeTDS appear to be affected. Restarting httpd makes the database connections work correctly again. What could cause this problem? Using: Centos 5.9 freetds 0.91 Apache httpd 2.2.3 /etc/obdc.ini: [DSN] Description = SQL Server 2005 Driver = FreeTDS ;Database = dbname Servername = SERVERNAME ;TDS_Version = 8.0 /etc/freetds.conf: [SERVERNAME] driver = /usr/lib64/libtdsodbc.so host = db.example.org port = 1433 tds version = 8.0 client charset = UTF-8

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• Can't connect printer wirelessly to linksys wrt54g using WPS

  - by Mark J Seger

  I've already blown over 1/2 day on this. I keep checking and rechecking my router settings and they agree with what the documentation says for my brand new HP4620 printer. Supposedly I just tell the router to listen for connections and tell the printer to connect. It fails every time! Further, I have also read some opinions that when things are not configured correctly the linksys will disable WPS and it looks like that's happening as well. Further, it's causing other wireless devices in my house to lose there connectivity until I re-enable WPA networking on the router. Has anyone been here before? This is driving me crazy... -mark

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• Image doesn't fill monitor when connected via HDMI

  - by russau

  Connecting a Dell Studio Slim to a Dell ST2210 21.5" monitor. The PC has a ATI Radeon HD 4350 video card. The video card has DVI and HDMI connections. When I connect with the DVI everything works fine. When I connect with the HMDI the image doesn't fill the screen, i.e. there's a approx 1 inch black border around the image. Win7 tells me the res is 1920x1080 (the native res of the monitor). Tried rebooting, no luck.

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• Windows Xp, Svchost.exe connecting to different ips with remote port 445

  - by Coll911

  Im using Windows Xp professional Sp2 Whenever i start my windows, svchost.exe starts connecting to all the possible ips on lan like from 192.168.1.2 to 192.168.1.200 The local port ranges from 1000-1099 and the remote port being 445. After its done with the local ips, it starts connecting to other random ips. I tried blocking connections to the port 445 using the local security polices but it didn't work Is there any possible way i could prevent svchost from connecting to these ips without involving any firewall installed ? since my pc slows down due to the load I'd be thankful for any advices

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• Several border firewalls in the same network

  - by nimai

  I'm currently analyzing the consequences of multipath connections for the firewalls. In that context, I'm wondering if it's really uncommon to have several firewalls at the borders of a network to protect it. The typical case I'd imagine would be a multihomed network, for which the administrator would have different policies for links from different (or not) ISPs. Or maybe even in an ISP's network. What would be the practical (dis)advantages of such a configuration? Could you provide an example of an existing topology using several border firewalls?

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• How can I make my browser(s) finish AJAX requests instead of stopping them when I switch to another page?

  - by Tom Wijsman

  I usually need to deal with things on a page right before switching to yet another page, this ranges from "liking / upvoting a comment or post" up to "an important action" and doesn't always come with feedback on whether the action actually proceeded. This is a huge problem! I assume the action to proceed once I start the particular AJAX request, but because I switch to another page it didn't actually happen because the AJAX request got aborted. This has left me several times with coming back to the page and seeing my action didn't take place at all; to give you an idea how bad this is, this even happened once when commenting on Super User! Is there a way to tell my browser to not drop these AJAX connections but simply let them finish?

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• How to find malicious IPs?

  - by alfish

  Cacti shows irregular and pretty steady high bandwidth to my server (40x the normal) so I guess the server is udnder some sort of DDoS attack. The incoming bandwidth has not paralyzed my server, but of course consuming the bandwidth and affects performance so I am keen to figure out the possible culprits IPs add them to my deny list or otherwise counter them. When I run: netstat -ntu | awk '{print $5}' | cut -d: -f1 | sort | uniq -c | sort -n I get a long list of IPs with up to 400 connections each. I checked the most numerous occurring IPs but they come from my CDN. So I am wondering what is the best way to help monitor the requests that each IP make in order to pinpoint the malicious ones. I am using Ubuntu server. Thanks

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• Establish direct cable connection between Windows 8 PCs in home network

  - by Marie. P.

  I'm running two PCs, a desktop and a laptop with Windows 8 Release Preview ("Build 8400"). They are connected to the same router in infrastructure mode, thereby having wireless internet. Due to often file synchronization between the machines I want to establish a cable connection that allows direct file transfer, without needing to use the wireless. When I plug in the cable (normal, not cross-over), I see in "Control Panel\Network and Internet\Network Connections": "Ethernet - unidentified Network" on both PCs. Transferring a file between both still only uses the WiFi via the Router. I noticed that when turning off the wifi on one PC, I can set up a shared internet connection that will work via Ethernet-cable, but since sometimes only one PC runs, sometimes the other one, I do not want to have the internet of one machine to be dependent on the other one being switched on. I do not have a crossover-cable, but since I did connect the PCs already successfully (just without both being on the internet), I'm sure that this should also work with a normal ethernet cable.

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