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• Cisco NAT + IPSec + Web Server Configuration Question

  - by zagman76

  Hello - I currently have a Cisco 881W, and it is configured with one of our static IPs to do basic NAT for the network. We also have a web server that needs it's own IP. I configured the NAT for the 2nd IP, however now traffic through our IPSec VPN doesn't route to the web server properly (well, it routes to the internet, rather than through the Tunnel). I followed the instructions here: http://www.cisco.com/en/US/tech/tk583/tk372/technologies_configuration_example09186a0080094634.shtml But now the outbound NAT doesn't seem to be working properly - it keeps going to the NAT of the Cisco, and not the designated IP address. If anyone can assist, I would appreciate it greatly. Let me know what you need, and I'll get it to you! Thanks!

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• Show Slave Status not working from console, nor client.

  - by Mr. Leinad

  Hello, I have a somewhat strange case. Whenever one of my coworkers executes this line: show slave status; from their MySQL clients, it works smoothly. But if I do that, it says: ERROR 1227 (42000): Access denied; you need the SUPER,REPLICATION CLIENT privilege for this operation We are all going against the same database, and if I check privileges I can see: GRANT ALL PRIVILEGES ON . TO 'usermysql'@'%' IDENTIFIED BY PASSWORD 'password' There's something wrong with my computer.. but I can't pinpoint where it is.. Thanks EDIT: It's kinda bizarre.. it goes through a VPN remotely. But if I change the internet connection, then it works.. If the previous internet connection is restored, it doesn't.. Could we classify this among the great mysteries of the world? Or someone has an idea?

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• Joining a network with a Virtual Windows Server 2008 R2

  - by Triztian

  Hi all, here's my case, I have set up a share in a virtual windows server 2008 R2, the server is hosted by GoDaddy my question is, how do I access the server's public folders, I need to open a file locally (on the client) and to do that I need the server to show up in my Network locations, I have the right credentials and have created a special group that has access to the particular folder that I'm sharing the problem is I don't know how to add the server to my network locations. I have tried VPN Connection but it is my understanding that it cannot be done since it is virtual share server. Any help is trully appreciated.

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• my file download speed is 180-200kbps but speedtest is showing 1.7mbps and i am subsribed to 2mbps pack?

  - by edward

  i'm from Malaysia. I am subscribed to 2mbps pack from my country's ISP. But all i get is only 200kbps when download files from the internet, when i test my speed on speedtest.com , it shows me 1.7mbps. I am pretty confused , ISP should give users what they stated , yeah a 2mbps. But i only recieved 200kbps and the speedtest shows 1.7mbps which makes me confused even further. So i started googling and found out that it is related to something called VPN compression? can anyone explain to me how these things works? why am i getting much much lower speed than i have subscribe to. (I am using a D-Link DSL-2750 U modem) Thanks.

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• Not able to connect to port different than 22 - OpenVPN

  - by t8h7gu

  I have OpenVPN network with 5 clients. Computer with Arch Linux which hosts OpenVPN server, It also hosts virtual machine with Computer with CentOS which is also connnected to OpenVPN subnet. Windows 8 which hosts virtual machine with CentOS. Both of them are connected to OpenVPN. Last one machine is virtual machine with CentOS which is hosted by computer with Ubuntu 14( which is not connected to OpenVPN. All machines in OpenVPN subnet are bolded. All phisical computers are in different networks. The problem is that when I use nmap to scan Windows and it's guest virtual machine it's saids that host seems down. When I force namp to scan specific port it shows filtered state: nmap -Pn -p 50010 n3 Starting Nmap 6.46 ( http://nmap.org ) at 2014-06-07 19:49 CEST Nmap scan report for n3 (10.8.0.3) Host is up (0.11s latency). rDNS record for 10.8.0.3: node3.com PORT STATE SERVICE 50010/tcp filtered unknown Telnet also cannot connect to this port telnet n3 50010 Trying 10.8.0.3... telnet: Unable to connect to remote host: No route to host But ss on this host show's proper state of this port ss -anp | grep 50010 LISTEN 0 50 10.8.0.3:50010 *:* users:(("java",12310,271)) What might be possible reason of that and how to fix it? EDIT I've found that I am able to connect via telnet to ssh port: telnet n3 22 Trying 10.8.0.3... Connected to n3. Escape character is '^]'. SSH-2.0-OpenSSH_5.3 So it seems that it's not problem with Windows firewall. But I have no idea what it might be. Also nmap result for first thousand ports: nmap -Pn -p 1-1000 n3 Starting Nmap 6.46 ( http://nmap.org ) at 2014-06-07 20:08 CEST Nmap scan report for n3 (10.8.0.3) Host is up (0.49s latency). rDNS record for 10.8.0.3: node3.com Not shown: 999 filtered ports PORT STATE SERVICE 22/tcp open ssh Nmap done: 1 IP address (1 host up) scanned in 77.87 seconds

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• Trying to send email from nagios

  - by batman

  I'm very new to Nagios. I'm trying to send email alerts. But that doesn't seem to be working. But in my log of nagios I can see this : SERVICE ALERT: Appserver;Tmp directory;CRITICAL;HARD;1; Where host notifications are generated via email, only service alerts are not working. And when I look at sendEmail log I can see this : Sep 14 12:38:39 x.x.x.x. sendEmail[23005]: ERROR => You must specify a 'from' field! Try --help. Sep 14 12:39:39 x.x.x.x.x. sendEmail[23129]: ERROR => You must specify a 'from' field! Try --help. Sep 14 12:40:39 x-x-x-x-x sendEmail[23233]: ERROR => You must specify a 'from' field! Try --help. Where I'm making the mistake? Thanks in advance.

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• Get the interface and ip address used to connect to a specific host (ip)

  - by umop

  I'm sure this has been asked and answered before, but I wasn't able to find it, so hopefully this will at least link someone to the right place. I want to find out my local interface and ip address used to reach a certain host. For instance, if I had 3 adapters connected to my box and they all three went to different networks, I'd like to know which of the three (specifically, its ip address) is used to reach my.local.intranet (in this case, it would be a vpn tunnel interface). I suspect this is a job for ifconfig or traceroute, but I haven't been able to find the correct switches. I'm running OSX 10.7 (Darwin) Thanks!

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• Nagios DNX plugins

  - by danneh3826

  I'm toying with the idea of multiple Nagios instances setup to monitor our infrastructure. I've looked at all the various methods of distributed Nagios checks, and I think DNX comes out the closest. DNX handles failure of worker nodes, that's fine. What happens if the main DNX server fails though? Is there a way to replicate the server too? I'm using AWS EC2 primarily, so I can utilise Elastic Load Balancing for the web UI, but I need to be able to handle the AZ where the monitoring server is to fail over, and essentially for a second to pick up the checking load (active/passive, active/active, so long as it doesn't fail completely) The other thing I'm trying to solve is an issue with routing. What I'd like is to have multiple nodes report a fault before Nagios confirms it as critical. Not the NRPE checks, as they're pretty self explanitory, but things more like check_ping. I often have routing issues out of AWS to certain datacenters, so Nagios can often report bad/no ping/timeout as a critical issue, even though the machine in question is working fine. Would it be possible to have a setup where a worker complains a service check is critical, and have a second worker node (positioned in another datacenter/AZ) also report the service as critical before the Nagios central server issues a critical alert? I realise I might be asking a bit much (how far down the line do you go setting up failover systems before it starts to get ridiculous), however surely someone must have thought of this scenario when developing DNX?

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• Recommendations for good Unix MTA / groupware solutions? [closed]

  - by Jez

  Possible Duplicate: Exchange server replacement that runs on Linux I'm setting up a Debian server, and one of the things I need on it is an MTA. I don't want to use something like Exim or Postfix because I want something that ties in SMTP, POP3, and IMAP all in one (a la Microsoft Exchange). Most MTAs also seem to be hellishly difficult to configure. Try and read the Exim documentation; you could do a university degree on it (I'm not kidding). When you can get an HTTP server like Cherokee which is easy to configure and has a nice web interface, do MTAs or groupware solutions need to be that hard? I'm aware that some people think "the Unix way" is to have lots of different interacting pieces of software (like maybe an SMTP MTA, POP3 service, webmail service, and overarching manager to tie them all together), but I think this is a situation where that just makes things a lot harder to deal with and one large software suite fits in much more nicely. So, I'm looking for good open source software suites that will run on Debian that: Combine (at least) SMTP, POP3, and IMAP Are easy(ish) to configure Have a nice configuration web interface or GUI Are not defunct projects I don't mind if it's groupware and offers calendaring too, but I would only be using the e-mail functionality for now. Another nice-to-have would be built-in webmail (if we're combining a bunch of functionality, why not?) Note however that I do NOT need Outlook support. I am not really looking for an "Exchange replacement drop-in". The suites I've found so far that seem to match the above criteria (and have appropriate licenses) are Citadel, Kolab, and Zimbra. I'd appreciate anyone who has experience with any of these giving me the pros and cons of them, such as how easy they are to configure and what their performance is like. I'd also appreciate any other suggestions for solutions that fulfil my criteria that I may have missed out.

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• Advice on off-site backup of Hyper-V Failover Cluster

  - by Paul McCowat

  We are currently setting up a Server 2008 R2 which will be off-site over a leased line with VPN. At the main site is 2 x Hyper-V hosts in a failover cluster with PowerVault M3000i iSCSI SAN. We are using BackupAssist for local backups and each host backups up itself and it's guests nightly creating a 500GB backup each which is copied to a 2TB rotated NAS drive. Files and SQL DB's are also backed up / log shipped etc. Looking for the best way to backup the Hyper-V VM's and copy them off-site so that the OS's are only a month old and the data is a day old. The main backups are too large to transfer between backups so options discussed so far are: Take rotating individual backups of the VM's each day and copy over, Day 1 SQL VM, Day 2 Exchange VM etc, would require more storage. Look in to Hyper-V snapshots, however don't believe these are supported in clustering. 3rd party replication tools

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• RabbitMQ Management console not working

  - by rrejc

  I have started with RabbitMQ. I have a (windows) machine on which I installed two RabbitMQ nodes as a service - I have choose the nodename, port and service name for each of them. The services are running normally (i see that they are listening in a netstat-a). I have also installed management plugin with "rabbitmq-plugins enable rabbitmq_management" and restarted both services. But the plugin isn't running - I dont see it listening in a netstat and I can't connect to the management console via browser. Any idea what could be wrong? Is there any log to see what is goind on? Updated: when I do rabbitmq-plugins list i get: c:\RabbitMq\sbin>rabbitmq-plugins list [e] amqp_client 3.0.1 [ ] cowboy 0.5.0-rmq3.0.1-git4b93c2d [ ] eldap 3.0.1-gite309de4 [e] mochiweb 2.3.1-rmq3.0.1-gitd541e9a [ ] rabbitmq_auth_backend_ldap 3.0.1 [ ] rabbitmq_auth_mechanism_ssl 3.0.1 [ ] rabbitmq_consistent_hash_exchange 3.0.1 [ ] rabbitmq_federation 3.0.1 [ ] rabbitmq_federation_management 3.0.1 [ ] rabbitmq_jsonrpc 3.0.1 [ ] rabbitmq_jsonrpc_channel 3.0.1 [ ] rabbitmq_jsonrpc_channel_examples 3.0.1 [E] rabbitmq_management 3.0.1 [e] rabbitmq_management_agent 3.0.1 [ ] rabbitmq_management_visualiser 3.0.1 [e] rabbitmq_mochiweb 3.0.1 [ ] rabbitmq_mqtt 3.0.1 [ ] rabbitmq_old_federation 3.0.1 [ ] rabbitmq_shovel 3.0.1 [ ] rabbitmq_shovel_management 3.0.1 [ ] rabbitmq_stomp 3.0.1 [ ] rabbitmq_tracing 3.0.1 [ ] rabbitmq_web_stomp 3.0.1 [ ] rabbitmq_web_stomp_examples 3.0.1 [ ] rfc4627_jsonrpc 3.0.1-git7ab174b [ ] sockjs 0.3.3-rmq3.0.1-git92d4ba4 [e] webmachine 1.9.1-rmq3.0.1-git52e62bc

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• backuppc - how to backup remote (over the internet) clients?

  - by Scott

  I am testing out backuppc, which works great so far backing up windows clients on a LAN via SMB (no backup client/agent required). However I have quite a few laptops and desktops that are in various remote locations - some of which move around. I need some way to have that remote computer create an outgoing connection for backup purposes (Windows XP/7). I know backuppc supports smb, rsync and 'tar', but I believe these are all connections going from the server TO the client. SO, I either need a way to vpn the client on a timed basis, or it would be a lot better if the client could some how connect to the server (ssh?) and initiate it's own backup somehow (rsync?). Of course this all needs to be pre-installed by me and require no maintenance by the end user, no dialogs on their side. What do you think?

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• My new SSD is causing issues. How can I solve them?

  - by Allan

  Computer specs 1 TB harddisc 120 GB 520intel SSD 8 GB DDR3 RAM Athlon Phenom II x64 955 3. 2ghz DK DFI Lanparty FX7900 M3H3 motherboard ASUS ATI RADEON HD6970 2 GB I have bought a new SSD (Intel 520, 120 GB), and wanted to use this as my system disc. I removed the other harddisc, and installed the SSD with the newest firmware. And then Windows 7 I updated Windows 7 with no problems and then put back my old harddrive. I formatted that old harddrive just to clean up at the same time... So at this stage everything was perfect. My new SSD was set as Master 0 Primary it boots on it and I have 1 TB emptyu harddrive I can use for whatever I want. So far no errors at all Now here is the problem, I installed a few games and everytime I tried to play the computer would say Windows must restart because DCOM server process launcher service terminated, or it says Windows must now restart because the Plug and Play service terminated unexpectedly Most commonly this error is caused by a rootkit virus, well I have tried formatting my entire computer, and running every antivirus I could find, so that shouldn't be it. I've also read somewhere it might happen when there are hardware issues. That on the otherhand would make sense, as I just put in a new SSD. I don't expect you to know this error. I haven't found anyone who knew it yet. maybe you can me guide through what might have gone wrong when I placed in the SSD? What have I checked regarding the SSD? It displays the right name when the computer starts up It has the newest firmware Did a 'sfc /scannow' which told me everything was fine I don't know what to do from here. Everything seems to work great with the drive. when I start playing games my computer crashes.

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• iptables: How to combine DNAT and SNAT to use a secondary IP address?

  - by Que_273

  There are lots of questions on here about iptables DNAT/SNAT setups but I haven't found one that solves my current problem. I have services bound to the IP address of eth0 (e.g. 192.168.0.20) and I also have a IP address on eth0:0 (192.168.0.40) which is shared with another server. Only one server is active, so this alias interface comes and goes depending on which server is active. In order to get traffic accepted by the service a DNAT rule is used to change the destination IP. iptables -t nat -A PREROUTING -d 192.168.0.40 -p udp --dport 7100 -j DNAT --to-destination 192.168.0.20 I also wish all outbound traffic from this service to appear to come from the shared IP, so that return responses will work in the event of a active-standby failover. iptables -t nat -A POSTROUTING -p udp --sport 7100 -j SNAT --to-source 192.168.0.40 My problem is that the SNAT rule is not always run. Inbound traffic causes a connection tracking entry like this. [root]# conntrack -L -p udp udp 17 170 src=192.168.0.185 dst=192.168.0.40 sport=7100 dport=7100 src=192.168.0.20 dst=192.168.0.185 sport=7100 dport=7100 [ASSURED] mark=0 secmark=0 use=2 which means the POSTROUTING chain is not run and outbound traffic leaves with the real IP address as the source. I am thinking I can set up a NOTRACK rule in the raw table to prevent conntracking for this port number, but is there a better or more efficient way to make this work? Edit - Alternative question: Is there a way (in CentOS/Linux) to have an interface that can be bound to but not used, such that it can be attached to the network or detached when a shared IP address is swapped between servers?

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• Full-text search locks up database - error 0x8001010e

  - by Stewart May

  Hi We have a full-text catalog that is populated via a job every 15 minutes like so: ALTER FULLTEXT INDEX ON [dbo].[WorkItemLongTexts] START INCREMENTAL POPULATION We have encountered a problem where the database containing this catalog locks up. There are a couple of scenarios, we either see the job execute and the process hang with with a wait type of UNKNOWN TOKEN, or we see another process hang with a wait type of MSSEARCH. Once this happens the job continues to run but informs us that the request to start a full-text index population is ignored because a population is currently active. Looking in the full text log files we see the following error each time these problems occur: 2010-04-21 08:15:00.76 spid21s The full-text catalog health monitor reported a failure for full-text catalog "XXXFullTextCatalog" (5) in database "YYY" (14). Reason code: 0. Error: 0x8001010e(The application called an interface that was marshalled for a different thread.). The system will restart any in-progress population from the previous checkpoint. If this message occurs frequently, consult SQL Server Books Online for troubleshooting assistance. This is an informational message only. No user action is required."'' The only solution is to restart the SQL Server service and then the full text service. This is now occuring on a daily basis now so any help would be appreciated.

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• Why are the external IP of my router not the same as the external IP of my computer

  - by Martin

  I have a standard network setup where all my network devices, both WIFI and ethernet, are connected to the same router. Lately, however, I've been experiencing some very strange behavior. It started as a simple connecting error, when I tried to reach an FTP server using the external IP. Of course I went right into one of those CheckMyIP sites, to double check the IP and it turned out to be correct. Then I went into my router setup, which is through a tool called aiport-tool, because I have an Apple Aiport Extreme router. Turns out the router displays a different external IP, and for some reason that external IP works when I try to access the FTP server. Can anyone explain what is going on? Why are the devices connected to the router displaying an incorrect external IP? BTW i have no VPN/proxy setups on any of my devices.

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• How can I create a simple Exchange 2010 backup solution?

  - by bduncanj

  I'm sure this question's been asked a dozen times in one form or another, however after much searching, there doesn't appear to be an obvious simple recovery solution for a single Exchange box. We're using Exchange 2010 on a single server, the server hosts the AD and nothing else on the network uses the AD. The intent is to run this server as you would an externally hosted Exchange server - access only via HTTP (RPC mode or OWA) - all other ports blocked. I've a daily backup running, using Windows Server 2008 volume shadow service to backup the Exchange data to an external hard disk. My question is, how do I perform a bare metal recovery of this server? 1) Do I need to be explicitly including the active directory information in this nightly backup, or will it be there by virtue of the fact that this system is the primary AD server and the Windows backup service knows this? 2) I understand I can re-install Server 2008 onto my new hardware (in the case of hardware failure) and then run Exchange 2010 setup.exe with a /recover argument, referencing the backup volume. 3) It is acceptable to have some downtime during this recovery process. But is there anything else I should be aware of? Thanks! Duncan

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• Win 2008 Server configuration

  - by user123790

  Let me preface my question by saying I'm a novice in regards to server configuration. It's been 12+ years since I've attempted this. What we (our small office) are trying to achieve is to setup a Win 2008 server (located in a home) in a home network configuration (basic wireless router w/DHCP) that we (the office) can VPN to from our office. I have installed the software, installed DHCP, removed DHCP from the router, set the scope for 100 IPs and am now looking for information as to where I go from here? I believe I need to configure DNS and possibly set up static routes on the router for the home devices that need internet? The wireless clients are not receiving IPs is the current issue that I'd like to tackle. Also, would it be feasible to use the router's DHCP to assign IPs rather than having the server do it? If so, what would be the most direct way to accomplish this? I appreciate any help in this matter. Thanks

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• How to specify multiple HostName/Port combinations in .ssh/config

  - by leoluk

  I have multiple notebooks and workstations which pull and push from multiple Mercurial repositories on a central server. I usually use .ssh/config to set an alias: Host repo-server HostName server.somedomain User user143 IdentityOnly yes IdentityFile ~/hgkey Port 156 ... and some more options, you get the idea. I can then simply do a hg push ssh://repo-server//hgroot/someproject on every local repository, and I can change the server address and port in one place. For workstations, this works fine, but the notebooks can access the server either from inside the network or from outside, using a different address and a different port. Is there any way I can specify multiple HostName/Port combinations so that SSH automatically tries them in order? This way, the users could push and pull without having to care about the correct address. (of course, using a VPN would be the most correct solution)

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• MongoDB and GrifFS. What are the best storage options in the range of 1 TB?

  - by Nerian

  We are going to launch a service that will require between 1 and 2 GB for file storage per paid user. I am going to use GridFS for storing files. I am pondering the different options for storing the database. But since I am unexperienced at deployment and it is my first time with Mongodb I need your experience. Criteria: I want to spend my time developing my core business, that is, my own application. I am a Ruby on Rails developer. I do not like to mess with server configuration. Hence, I would like a fully managed hosting solution. But I would like to know about any other option, if you think it is worth it. It should be able to scale. Cloud style. Pay as you go. The lower the price, the better. So far I known of these services: https://mongohq.com/pricing https://mongomachine.com/pricing https://mongolab.com/about/pricing/ http://cloudcontrol.com/add-ons/mongodb/ And they seem to be OK for common needs, that is no file storage. But I am going to use GridFS, so the size matters. These services seems to scale, in price, quite poorly. MongoHQ: The larger plan max storage is 20 GB. Seems like a very little storage, for GridFS. MongoMachine: Flat price, 2.5$ per GB. I didn't found the limit. Seems like a good price, comparing the others. MongoLab: 3.984 GB max, which I don't think I will hit, so perfect. 8$ per GB, quite costly. CloudControl: The larger plan is 20 Gb. The custom service starts at 250€ plus some unspecified charge per GB. What is your experience with these services? Any downtimes? Other possibilities?

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• Is there a way to reliably backup and restore a complex network configuration on Windows XP?

  - by djangofan

  I have some Windows XP laptops (10+) that host a ad-hoc WIFI network connection to wireless PDA devices. The laptop itself is connected via a 3rd party VPN radio network. The radio network itself seems to be reliable. If one small thing goes wrong with the network configuration then the PDA loses connectivity and so I need a way to backup a networking config , either via a script or a 3rd party program, so that I can restore a working network configuration if something goes wrong. Is this possible? Does anyone have any ideas?

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• Can the traditional remote desktop client be accessed in Windows RT?

  - by nhinkle

  As mentioned in another question, I've been unable to connect through the Remote Desktop metro app to some computers, in particular those requiring VPN access or load balancers. I'm considering purchasing a Microsoft Surface RT, but given that the app store hasn't matured significantly yet and some niche software will likely never be ported to the Modern UI, I must have acess to remote systems somehow. Until Citrix fixes the receiver app for Windows 8, I'm stuck using remote desktop. Which doesn't work. I've heard that Windows RT comes with some of the Microsoft desktop programs built in, like Microsoft Office and File Explorer. Is the "normal" Remote Desktop Connection program available in Windows RT, and if so, is it 100% compatible with previous versions?

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• SQL server environment

  - by Olegas D

  Hello I'm considering a bit of changes in current sales environment. And trying to check all cons and pros. Current situation. SQL server (quite decent HP server - server1) + backup server (smaller Dell server - server2). all sql files and sql server itself are on the server1. If something goes wrong with server1 I will have to manually move to server2. Connecting to the sql server: 1 HQ (where server located) + 4 sites through VPN. Now I'm considering 2 scenarios: Buy some storage system + update existing servers (add ram, upgrade processors) and go for VMWare ESXI. Rent a server at a datacenter + rent virtual server in case real server goes down. Also rent some space at data storage to keep SQL files there. Have anyone considered these things and maybe found some good pros/cons list? ;) Thanks

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• Server side url scanner for malware, spyware , viruses and protect my visitors

  - by Vangel

  I have a forum/groups site that contains a lot of external URLs, sometimes direct download links. I want to protect my visitors from possible attacks from malware sites as they are mot likely to click on these links. CUrrently I implement DBL (spamhaus) but thats not enough. I want to run a background task to check the outgoing links first. I have looked at similar questions in StackOverflow (wrongly posted there) and here but fail to find a question same as mine or a good answer. People have suggested ClamAV , I don't believe it can detect Web hosted malware sites and its has a lot of missed detection. I have looked at google safe browsing service ( http://code.google.com/apis/safebrowsing/developers_guide_v2.html very complicated to implement or maintain plus midway I get lost :S ) I can go for commercial solution, anything to protect the visitors and my site brand. But I would like to hear the opinion of server admins and if anyone has implemented such a service. My Server is basic CentOS LAMP stack. thank you very much in advance.

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• Kill UDP port that has no process?

  - by Chocohound

  I can't bind to UDP port 500 from my code (yes I'm running w/ sudo). The port is reported as "already in use" (Mac os X), but doesn't have an associated process: $ sudo netstat -na | grep "udp.*\.500\>" udp4 0 0 192.168.50.181.500 *.* udp4 0 0 192.168.29.166.500 *.* But sudo lsof doesn't show a process on port 500 (ie sudo lsof -i:500 -P reports nothing). How can I unbind port 500 so I can use it again? I believe I have a bad VPN client that isn't cleaning up after itself, but I can't get rid of this without rebooting the machine.

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