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• Service redirection on same network

  - by Unode

  I have a network on which I run multiple servers each dedicated to a given service. Because most services run on distinct ports I'm currently looking for a way of unifying "all" services into a single "proxy" machine. The idea is to abstract which machine is being accessed but still allow direct connection if needed/requested. This "proxy" machine has only one network interface which is part of the same network as all the other service providing machines. I've looked into Routing and NAT but I've so far failed to figure out how to make it work. I tried to achieve this using shorewall but couldn't find clear examples. However I'm not entirely sure this is the best/simplest strategy. With that said, what would be the best way of achieving this result? Example case: Proxy IP - Listening port - Send requests to 192.168.0.50 80 192.168.0.1:80 " 22 192.168.0.2:2222 " 3306 192.168.0.3:3000 " 5432 192.168.0.4:5432 " 5222 192.168.0.5:5222 PS: I'm not concerned with the single-point-of-failure nature of the proxy. Thanks

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• Windows XP VM on VMWare ESXi 4.1 "pausing" / blocked occasionally

  - by FelixD

  We have an issue with Windows XP SP3 VMs on VMWare ESXi 4.1.0 (the free version): They sometimes seem to "pause" for several minutes. This happens rarely (maybe once a month per VM, at least noticed only that often), but still is an issue for us. It happens for three different but similar VMs on three pretty different hosts (different hardware). I have the feeling that the "pausing" is not actually the CPU blocking, but probably the harddisks, but not 100% sure. The servers have one IDE disk (C:) and one SCSI (D:) and it might be either of the two. I have seen scheduled tasks simply not starting for up to 9 minutes and then running normally again with normal speed. They were totally blocked. This is not a load issue, the VMWare hosts have average load and the VMs in question already have reserved CPU resources plus high priorities for CPU and disk. The Windows boxes run mainly MySQL, Tomcat, FileZilla server, Cygwin stuff, Java + R applications, VMWare client, Elusiva Terminal Server pro, Nagios client. Not sure if this might be related with any of that software (e.g. Elusiva). Trying to debug this, there was nothing visible in Windows Event log, other logs in C:\Windows, VMWare events etc. Unfortunately the vmware.log file ends with "Log throttled". We found that we ran into 2 VMWare bugs there: The VMWare client writes lots on bogus messages in the vmware.log, which we now disabled (log level error setting) plus the bug that VMWare does not unthrottle the log (at least so far despite VM reboots). I know there is not much guidance and that may also be the reason why I so far didn't find anything related on the web or on ServerFault, but maybe some of this rings a bell with someone? Or please direct me to what more info to post. I hope that the vmware.logs get unthrottled eventually (can't easily restart the hosts at the moment). Thanks for any input!

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• How does everyone set up AWS for PHP with a git workflow while worrying about distributing EC2?

  - by Parris

  Hello, I have been looking for something like heroku but for php, and after much frustration (and almost finding what I need, but not quite) we decided to just go with AWS without any other abstraction. We are using PHP 5.3 (and CakePHP 1.3), and are currently using git. Ubuntu seems like the easiest way to get both of those on there and we will most likely use that. We aren't really going worry about outgoing email. We are using smtp through gmail, but will most likely switch to some other service eventually. I had 3 questions: 1) I have been looking at Zend Server, and I am not quite sure how that is more beneficial than xampp. Perhaps it is not? 2) I suppose to make the application scale we would need multiple instances of some ec2 ami. Then just duplicate it and such. The question then becomes how do we make sure all EC2 instances are up to date? 3) I understand the concept of load balancing to some degree. I understand that in 1 region you select a bunch of servers and have it load balance across them. The question then becomes well how about world wide? How do I make it so that traffic is directed to the correct ec2 server? I have heard of route 53, and tried signing up for that, but nothing appears in my control panel. Also perhaps it is just a DNS thing with my domain registrar? AHHH... some tutorial would be helpful!

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• Running Tor relay on personal server: can this hurt?

  - by rxt

  I would like to install TOR as relay on a hosted personal server. I have loads of bandwidth that I don't use. It's not an exit point. Can this hurt my server somehow? Possible problems I'm thinking of are blacklisting the IP-address, or something similar. I know that exit points get blacklisted on many servers. So if I'm using Tor as a client, I will probably use a blacklisted IP-address for the outside world, so cannot access those sites. However, I'm running this on a server, and as a public relay. Could this hurt the functioning of and access to websites on this server? I could install it as a bridge. I'm a little confused about the difference between bridging and relaying. If I understand correctly the only difference is that a relay is public. Does this mean that bridging only works if I know someone and give them my IP-address?

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• Automatic switching of network card when vm is moved

  - by spock

  I have two hosts in a pool and I used to be able to move the vm around and they will start without any problem. But after I played around with some network setting, which I don't remember what, I started getting "This VM needs storage that cannot be seen from that server" message. As you can tell I am a beginner with Xenserver. Here is the very simple environment: 2 host servers with their own local hard disk and network card. One is a Pool master. Problem: Power off a vm and move vm from one server to another, or clone one vm to the other server. It used to be able to start up right away. Now, I need to delete one of the network that does not belong to the server, then it will start. Otherwise, the above error msg popup. The two networks (one for each network card in each host) are in the Networking tab of the vm, as well as in the host's networking tab. I googled but all I got to empty the DVD drive, which is not the problem here. Thanks in advance!

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• Remote Desktop svchost (networkservice) & lsa.exe high cpu usage, hangs on welcome screen

  - by Rohan1

  We have deployed an RDS Farm with 12 virtual RDS servers using Hyper V. Currently some users are not able to log on. After passing credentials to the connection broker, the session hangs on the "Welcome" screen. Using resource monitor we've seen that svchost (with the "networkservice" service) has a CPU usage of 50%, when viewing the wait chain on the process it displays that it's waiting for a lsa.exe to finish. We can't kill any of the users processes, even when trying with taskkill /f. Suspending lsa.exe did work but didn't have any effect. The networkservice also couldn't be restarted. Also, if this happens, the current users logged on to the RDS server can't be displayed. Task manager crashes when viewing the users, RDS service manager crashes when viewing the users (even remotely) and the cmd command "query session" doesn't work. No antivirus is installed on the RDS server. The only thing we can do is rebooting the server, which is not an option because of the fact that other users are in active sessions. Does anyone have ANY idea what's going on? We didn't encounter this in our pre-production setup.

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• 5 year old server upgrade

  - by rizzo0917

  I am looking to upgrade a server for a web app. Currently the application is running very sluggish. We've made some adjustments to mysql (that's another issue in itself) and made some adjustments so that heaviest quires get run on a copy of the database on another server was have as a backup, however this will not last that much longer and we are looking to upgrade. Currently the servers CPUs are (4) Intel(R) XEON(TM) CPU 2.00GHz, with 1 gig of ram. The database is 442.5 MiB, with about 1,743,808 records. There are two parts of the program, the one, side a, inserts and updates most of the data. Side b, reads the data and does some minor updates. Currently our biggest day for side a are 800 users (of 40,000 users all year) imputing the system. And our Side b is currently unknown, however we have a total of 1000 clients. The system is most likely going to cap out at 5000 side b clients, with about a year 300,000 side a users. The current database is 5 years old, so we can most likely expect the database to grow pretty rapidly, possibly double each year (which we can most likely archive older records if it comes to that). So with that being said, should we get a server for each side of the app, side a being the master, side b being the slave, any updates made on side b are router to side a. So the question is should i get 2 of these or 1. 2 x Intel Nehalem Xeon E5520 2.26Ghz (8 Cores) 12GB DDRIII Memory 500GB SATAII HDD 100Mbps Port Speed And Naturally I would need to have a redundant backup so it could potentially be 4 of them.

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• Protocol (or service publish/discovery) to detect devices in network

  - by Gobliins

  we connect some embedded devices in a network. What i am looking for now, is a way to find the devices IP and identify them. We work with Windows PC´s and i am about to write a C# tool that should do this. I thought about send a udp broadcast and in the ack i.e. is the device´s ip, which would mean the device needs a daemon runnig to assign an ip itself. Running a service (like a printer) on the device, and on the PC just lookup for the service. I read about some things like apipa, zeroconf, ipv4 local link, bonjour, dns-sd, mdns, bonjour; They can automatically assign ip´s and publish services in a network. My Question is, can someone recommend me what would be good for my task? -The protocol or Service should be low on ressource (memory/cpu usage) use. -Are there some standard protocolls to use? -Is DNS a good idea or would it be to ressource consumpting just for finding a device´s IP? -Should also work when no dhcp servers are around. edit: To clarify a bit: The IP configuration is automatic. The problem to focus is how to tell the PC which IP in the network (or a direct connection in this vase there would only be one) belongs to the device (identity).

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• How to set up multi users on dev server with git and github

  - by Derek Organ

  I'm working on lamp application. We have 2 servers (Debian) Live and Dev. I constantly work on dev main to add new features and fix bugs. When happy all works well I scp the relevant code to the Live system. Database (mysql) is local to each machine. Now this is pretty basic setup really and I want to improve the workflow a bit. I use git and github for version control. Admittedly I've only really used one branch. Their can be 3 different developers who work on the code at different times. We all use the same linux username to connect to the dev server and edit the code directly when needed. I usually then commit and push the code at the end of the day to github. One thing to bare in mind is it isn't easy to run this code on a local machine as there are many apache and subdomain configurations that wouldn't work on a local machine so it is important to work on the dev server not locally. I need to create a new process because we need to have a main trunk now and a branch with a big code re-write. What is the best way to do this. Should I create different unix logins for each developer and set up different working areas on the dev server for there changes? e.g. /var/www/mysite_derek /var/www/mysite_paul /var/www/mysite_mike my thinking is they can do a pull from the main branch and then create there own branch and merge it back in. I'm not sure how this will work though with git locally and with github. will i need to create different github user accounts as well. I'd like to do this the 'right' way and future proof for having lots of potential developers but I also don't want to over complicate it. I simple and elegant solution is preferred. any recommendations or suggestions?

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• Cloned Centos 6.4 websrver for test purpose. Virtual host, .htaccess, redirecting url issue

  - by Shogoot

  I see similar questions, but not my exact challenge. What I have done so far I cloned a prod server over to a vmware to use it as a test server for new functionality I'm going to write. I'm not a sysadmin by trade, but I'm new to this company and I have to do some thing that are outside of my comfort zone (thats a good thing :) ) The prod server has 2 sites on it s1.com and s2.com. In /html/s1/, /html/s2/ there's an .htaccess file under each s*/. Looking like this: RewriteEngine ON RewriteBase / RewriteCond %{QUERY_STRING} id=([0-9]+) RewriteRule ^.* %1.htm RewriteCond %{QUERY_STRING} page=modules/checkout RewriteRule ^.* order.php RewriteCond %{QUERY_STRING} page=pages/sidekart RewriteRule ^.* pages/sidekart.htm The issue is that s1 has a lot of pages that really belongs under a third domain s3, the rule in line 4 and 5 redirects them to /html/s1/. An example of such URL is: s3.com/?page=modules/product&id=521614 I'm trying then to get those URLs (without modifying the URL) to redirect to s3's /html/s3/ server structure, which I set up making a new virtualhost s3 in test servers httpd.conf with a test3.com as servername and changing the other sites to tests1.com and tests2.com, and adding .htaccess also to this s3 root directory, and making a html/s3/ directory structure I populated with an index.html, etc. But, when I take the same URL (s3.com/?page=modules/product&id=521614) changing it to tests3.com/?page=modules/product&id=521614, I get s1's index page showing up in my browser. I've poked around about a day now and i cant figure out why this happens.

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• Experience with asymmetrical (non-identical hardware) SQL Server 2005 / Win 2003 cluster

  - by user24161

  I am reasonably good at dealing with SQL Server clusters; I am wondering if folks have experience, good or bad, using a mix of different models of servers from the same vendor in one SQL 2005 cluster. Suppose: I have one more powerful, more RAM, more shizzle box and one less powerful, less memory, less shizzle box bound together in a 2-node cluster. These would be HP DL380 and 580 machines (not that it should matter) I understand AND automate the process of managing memory for each SQL instance, so there's no memory contention when SQL instances fail over. Basically I am thinking a CLR proc will monitor the instances and self-regulate memory caps on each instance, so that they won't page or step on one another. I get the fact the instances might be slower and or under memory pressure if they share a "lesser" node, and that's OK. The business can deal with a slower instance in a server-problem scenario. Reasonable? Any "gotchas" to watch out for? More info 10/28: doing some experiments with a test cluster I find that reconfiguring max/min memory is OK PROVIDED the instance isn't already under memory pressure. If I torture the system with a huge query that demands a big chunk of RAM, and simultaneously adjust the memory allocation to a smaller value than what is being actively used, it's possible to run the instance out of memory and have it halt and restart itself (unhappy situation). Many ugly out-of-memory messages in the error log, crashing, burning... It's an extreme case, but good to know. Seems, then, that it would only be really safe to set this on startup of the instance, as in have a startup script that says "I am on node1, so my RAM settings are X or I am on node two, so they are Y," like this: http://sqlblog.com/blogs/aaron_bertrand... Update: I am testing a SQL Agent + PowerShell solution described in more detail here.

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• Exchange 2003 inbound routing issue

  - by user565712

  Just recently we started experiencing inbound routing issues. Email adddressed to [email protected] is intermittantly translated to [email protected]. This is happening for several users and, as stated, is intermittant. I don't know where to start looking for the solution. Is this an Exchange issue? A DNS issue? We have a single Exchange server inside our network with an FQDN of server.domain.local with a single SMTP Virtual Server. The Advanced properties of the Delivery tab of the Virt Server has an empty Masquerade Domain textbox and the value for the FDQN text-box is set to the domain itself, domain.com. The DNS record for domain.com is a CNAME entry referencing www.domain.com. Is this somehow related to the problem? I checked the headers of the inbound messages that generated NDRs as a result of being sent to [email protected] and nowhere in the header is www.domain.com mentioned. To make my life even more difficult, we use Postini as a third-party SPAM filtering service. Our MX records point to the Postini servers and Postini delivers the messages to our server. Perhaps it is Postini that is mucking things up? sigh I'm having trouble with this one and the intermittent aspect is making it that much more difficult for me. Any ideas?

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• thought about shared storage (NFS, Lustre) [closed]

  - by user134880

  Possible Duplicate: Can you help me with my capacity planning? Now I habe small cluster with total of 8 nodes. 6 of them are computing nodes (apache and vmware) and 2 nodes are for storage. 2 storage nodes are identical. Each storage server is linux box with 8 x 1Tb WD RE4 in soft raid 10. 1st box is master and 2nd is slave. Data is mirrored with DRDB. We export NFSv4 shares to Apache (for document root) and iSCSI to Vmware. Now all is working pretty good and stable. But it will be soon time to upgrade our system. I have been thinking of Lustre. Does some one has any real experience with Lustre or NFS medium clusters? Will it be good idea just to upgrade server and change hdd's to 3Tb ? With NFS we will always have only 2 servers to maintain (one primary and one slave). Thanks. QUESTIONS: 1) Does some one used Lustre? In production? I have seen a lot of info about how it is hard to setup Lustre because you need to compile own kernel and patches. It's answers from newbies. Is there some one who has used Lustre for some period of time? 2) About disk upgrades - it's only description of strategy. I'm not asking if it is enough 3Tb or not. I just ask if it is right just to replace hdds instead of adding new server (like with Lustre) Thanks again.

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• I have just created a subnet for a local network, connecting to a standalone server on another network, now I cannot connect to the internet

  - by Seth

  I am just learning some new aspects of servers and networking. We have a network of 5 subnets that all interconnect with each-other. In order to get two computers on the subnet that we were setting up, I changed the IP from the subnet where the standalone server is on (where they used to be set up)to the local subnet we are remotely hooking up. Likewise I also changed the gateway to coincide with the new subnet. Only problem is that since doing this, I am unable to establish a connection to the internet. I can ping the server and correspong gateway & DNS server, but cannot get connected to the internet. We do have a dumb-switch (non-programmable) connected that receives both the internet and private network inputs and distributes (or should do so) to about 5 other computers. Bottom line, I cannot currently connect to the internet, and am wondering what could be causing this.. It is likely something very obvious and pardon me being more vague than I probably should be, but I could use some help resolving this! Thanks for any help!

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• Exchange 2007 issue internet receive connector

  - by user223779

  I have issue with yahoo.co.uk if I send a mail from within the yahoo webconsole the mail arrives in my inbox on the exchange server If I send mail from Iphone configure to send via mail box configure with yahoo setting mail is dropped. It is not the phone I can send perfectly fine to other exchange 2007 servers same service pack etc. if you look at the smtprec log below. this message sent from the phone you can see stops after 354 Start mail input; end with . ,<,EHLO nm26-vm7.bullet.mail.ir2.yahoo.com, ,,250-mail.marcocm.com Hello [212.82.97.49], ,,250-SIZE 10485760, ,,250-PIPELINING, ,,250-DSN, ,,250-ENHANCEDSTATUSCODES, ,,250-AUTH, ,,250-8BITMIME, ,,250-BINARYMIME, ,,250 CHUNKING, ,<,MAIL FROM:, ,*,08D13F3CADECA060;2014-06-04T11:26:50.898Z;1,receiving message ,,250 2.1.0 Sender OK, ,<,RCPT TO:, ,,250 2.1.5 Recipient OK, ,<,DATA, ,,354 Start mail input; end with ., ,+,, This is the message hitting the same server sent from yahoo webmail. ,"220 mail.marcocm.com Microsoft ESMTP MAIL Service ready at Wed, 4 Jun 2014 12:29:26 +0100", ,<,EHLO nm4-vm6.bullet.mail.ir2.yahoo.com, ,,250-mail.xxx.com Hello [212.82.96.104], ,,250-SIZE 10485760, ,,250-PIPELINING, ,,250-DSN, ,,250-ENHANCEDSTATUSCODES, ,,250-AUTH, ,,250-8BITMIME, ,,250-BINARYMIME, ,,250 CHUNKING, ,<,MAIL FROM:, ,*,08D13F3CADECA06B;2014-06-04T11:29:26.237Z;1,receiving message ,,250 2.1.0 Sender OK, ,<,RCPT TO:, ,,250 2.1.5 Recipient OK, ,<,DATA, ,,354 Start mail input; end with ., 2,,250 2.6.0 <[email protected] Queued mail for delivery, <,QUIT, ,,221 2.0.0 Service closing transmission channel, ,-,,Local ,+,, Any Thoughts how to fix this issue much appreciated.

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• Get more space for redis in unix server

  - by DevTraveler

  In our app we have only windows servers beside the cases we use redis queues. This case , we use unix server created by amazon. As you can see we do not have a lot of space available and we want to make sure redis has enough space to work without getting stuck. I am little bit new in unix and after reading some data about the unix file system i still was not fully sure how can i give the redis drive (it is in the home directory) more space. I see the mnt that has a lot of space but read it is temporary for cd-rom and network drives. Can you help me figure out how to get more space to my redis ? If it is possible i prefer not to re-install the redis server. Filesystem Size Used Avail Use% Mounted on /dev/xvda1 7.9G 6.7G 880M 89% / udev 7.4G 4.0K 7.4G 1% /dev tmpfs 3.0G 152K 3.0G 1% /run none 5.0M 0 5.0M 0% /run/lock none 7.4G 0 7.4G 0% /run/shm /dev/xvdb 414G 30G 364G 8% /mnt Thanks.

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• How i can setup a nginx cache strategy that first try amazon s3, then memcache and do a fallback on miss?

  - by Tim

  i have a large site with lot of pages that almost never change, right now i am using two memcache servers (amazon elasticache), but this its really expensive. Thats why for this files that barely never change i want to upload them to amazon s3 and shutdown 1 memcache server. Here is my conf; location ~ /longterm/(.*){ proxy_pass http://amazonS3bucket; proxy_intercept_errors on; proxy_next_upstream http_404; error_page 404 503 = @fallback_memcached } location @fallback_memcache { set $memcached_key $uri; memcached_pass name:11211; error_page 404 @fallback; } location @fallback { try_files $uri $uri/index.html } I dont know why but the config doesnt work on the final fallback; if i got an amazon S3 hit it works, if i got an amazon S3 miss and a memcache hit it works, but if i got an amazon S3 miss then a memcache miss when it try to resolve the las fallback it fails. I am also thinking in use the amazon s3 fuse http://code.google.com/p/s3fs/ instead of the proxy pass i think it would be easier for implement, i would also be less performant?

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• FTP Scripting Capabilities

  - by lmg

  I am looking for an FTP client that will allow me to do the following Include a GUI for setting up a number of FTP connections Support FTPS Run unattended on Windows Server 2008 Retry failed transactions Support email Support custom scripts I need to pull files from a few different servers and there are certain calculations that need to be done depending on which server the files come from. I've looked at SmartFTP and it looks like pretty much what I need except I can't get it to run as a Windows Scheduled Task (I currently have some support threads open in their forum). I've also looked at a few other FTP clients (Filezilla, RoboFTP, and AutoFTP (you can find the Windows 7 BSOD in this one!)) that haven't had the capabilities I'm looking for. Right now, I'm looking at WS_FTP and its scripting capabilities. It appears I can create a script to run as a scheduled task, but I can't add the script to a file transfer task. Does anyone have suggestions on how I can do post-transfer processing on the files or better yet how to integrate scripting into the file transfer task? I'm also open to other suggestions for FTP clients as well if you have them! If I can't find a suitable FTP client, custom scripting will just have to do the trick.

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• RedStation.com is heaven for ddos attackers, How to file complaint?

  - by Ehsan

  Sorry, I don't know where to open this subject. This is not the first time we have faced with a massive DDOS attack from one of servers in RedStation.com and even after we had contacted with their abuse department with it's log there is no cooperation and they don't even like to bother themselves about it. and we don't know how to stop such activity. Do you know how to file complaint against this datacenter? we could not be patient anymore and see they are not care about such things on their network ? it seems like they are heaven for attackers now since they close their eyes to gain more money. I guess some global organization is missing in this matter to investigate such activity and make sure providers are responsible for their services. Here is some of it's log: 2686M 75G DROP all -- * * 31.3-RedStation 0.0.0.0/0 rt: 16167 0.002007 31.3-RedStation -> my-server-ip UDP Source port: 36391 Destination port: 16167 0.002011 31.3-RedStation -> my-server-ip UDP Source port: 38367 Destination port: 16312 0.002014 31.3-RedStation -> my-server-ip UDP Source port: 39585 Destination port: 12081 0.002018 31.3-RedStation -> my-server-ip UDP Source port: 39585 Destination port: 12081 0.002021 31.3-RedStation -> my-server-ip UDP Source port: 38367 Destination port: 16312 0.002025 31.3-RedStation -> my-server-ip UDP Source port: 39585 Destination port: 12081 0.002033 31.3-RedStation -> my-server-ip UDP Source port: 36391 Destination port: 16167 0.002037 31.3-RedStation -> my-server-ip UDP Source port: 38367 Destination port: 16312 0.002040 31.3-RedStation -> my-server-ip UDP Source port: 38367 Destination port: 16312 0.002044 31.3-RedStation -> my-server-ip UDP Source port: 38367 Destination port: 16312 0.002047 31.3-RedStation -> my-server-ip UDP Source port: 39585 Destination Any response would be appreciated

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• Why can I not edit, delete directories inside of this directory

  - by user43053

  Hello there, First, I thought this was PHP related, but maybe it isn't. My original post, which may be irrelevant now is located at the bottom. The problem is I have a directory : /articles/. In it are 10 sub directories. I have been changing the permissions lately, but now it seems all the permissions of the parent folder, sub-folders and files are either chmod 755 or 777. I cannot move, delete or edit files inside of this parent directory or sub-directories with my FTP-client. I can however edit, delete, create new files and directories and change them with PHP-functions without problems. What may the problem be? OLD POST. Ignore everything below this line: If I create a directory with mkdir(), or create a file with fopen(), file_put_contents() or SimpleXMLElement::asXML(), I am unable to access the file with my FTP-client or c-Panel File Manager. If I try to delete or edit them, I get errors. Dreamweaver suggests it is a permission problem or a network or filesystem fault (but I've set the permissions with chmod() to 0777, and when I check the cPanel, it confirms chmod 777. I also tried to use fileowner() and the function returns int(99), the same owner as those files that I could access with my FTP-client. It seems files and directories created with PHP can only be modified or be deleted with PHP. I thought this must be a server setup related issue, so I write it here. I am on a shared server, and I have no idea about setting up servers. EDIT: It seems the problem is different. I cannot move files with FTP-client to the parent, or sub-directories either. This problem may not be PHP related, then. It seems the problem applies to any directory, regardless of whether it was created by PHP. EDIT 2: The parent directory has chmod 755. Thank you for your time. Kind regards Marius

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• Using Plesk for webhosting on Ubuntu - Security risk or reasonably safe?

  - by user66952

  Sorry for this newb-question I'm pretty clueless about Plesk, only have limited debian (without Plesk) experience. If the question is too dumb just telling me how to ask a smarter one or what kind of info I should read first to improve the question would be appreciated as well. I want to offer a program for download on my website hosted on an Ubuntu 8.04.4 VPS using Plesk 9.3.0 for web-hosting. I have limited the ssh-access to the server via key only. When setting up the webhosting with Plesk it created an FTP-login & user is that a potential security risk that could bypass the key-only access? I think Plesk itself (even without the ftp-user-account) through it's web-interface could be a risk is that correct or are my concerns exaggerated? Would you say this solution makes a difference if I'm just using it for the next two weeks and then change servers to a system where I know more about security. 3.In other words is one less likely to get hacked within the first two weeks of having a new site up and running than in week 14&15? (due to occurring in less search results in the beginning perhaps, or for whatever reason... )

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• How to configure SVN server for my own project

  - by user1729952

  I work with a team on an Android project using Eclipse IDE, we need to use a version control and we need to access the repo remotely, I have no experience using or installing servers, a little experience using SVN on Windows, but I still have problems connecting to it remotely. I need to use no-ip.com to change my IP, however; I failed to make VisualSVN server to work with no-ip. What options do I have? The best thing is to get it work with Windows if not, I have another computer that is running Ubuntu 12.4.1, I have installed apache2svn on it trying to get it work, the svn is installed, I went through tutorials to configure accessing protocols, but I can't figure out how to access it remotely from another computer? Can someone tell me the steps I need to get this job done and I can do my search for each step? (Please explain each step as some keywords or phrases I may not be familiar with) EDIT: Also worth noting, that my company has a website hosted on a remote server, can we use it as a repo? and how? It's running Linux

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• How many iptables block rules is too many

  - by mhost

  We have a server with a Quad-Core AMD Opteron Processor 2378. It acts as our firewall for several servers. I've been asked to block all IPs from China. In a separate network, we have some small VPS machines (256MB and 512MB). I've been asked to block china on those VPS's as well. I've looked online and found lists which requires 4500 block rules. My question is will putting in all 4500 rules be a problem? I know iptables can handle far more rules than that, what I am concerned about is since these are blocks that I don't want to have access to any port, I need to put these rules before any allow. This means all legitimate traffic needs to be compared to all those rules before getting through. Will the traffic be noticeably slower after implementing this? Will those small VPS's be able to handle processing that many rules for every new packet (I'll put an established allow before the blocks)? My question is not How many rules can iptables support?, its about the effect that these rules will have on load and speed. Thanks.

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• How to prevent response to who-has requests on virtual eth interface?

  - by user42881

  Hi, we use small embedded X86 linux servers equipped with a single physical ethernet port as a gateway for an IP video surveillance application. Each downstream IP cam is mapped to a separate virtual IP address like this: real eth0 IP address= 192.168.1.1, camera 1 (eth0:1) =192.168.1.61, camera 2 (eth0:2) =192.168.1.62, etc. etc. all on the same eth0 physical port. This approach works well, except that a specific third-party windows video recording application running on a separate PC on the same LAN, automatically pings the virtual IPs looking for unique who-has responses on system startup and, when it gets back the same eth0 MAC address for each virtual interface, freaks out and won't allow us to subsequently manually enter those addresses. The windows app doesn't mind, tho, if it receives no answer to the who-has ping. My question - how can we either (a) shut off the who-has responses just for the virtual eth0:x interfaces while keeping them for the primary physical eth0 port, or, in the alternative, spoof a valid but different MAC address for each virtual interface? Thanks!

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• mysqld - master to slave replication using rsync innodb, sequence number issues

  - by Luis

  I've read several of the related topics posted here, but I have not been able to avoid this innodb error. The steps I've taken to replicate data from a Slackware server - 5.5.27-log (S) to a FreeBSD slave - 5.5.21-log (F) were these: (S) flush tables with read lock; (S) in another terminal show master status; (S) stop mysqld via command line in third terminal; (F) while both servers are stopped, rsync mysql datadir from (S), excluding master.info, mysql-bin and relay-* files; (F) start mysqld (skip-slave) 121018 12:03:29 InnoDB: Error: page 7 log sequence number 456388912904 InnoDB: is in the future! Current system log sequence number 453905468629. InnoDB: Your database may be corrupt or you may have copied the InnoDB InnoDB: tablespace but not the InnoDB log files. See InnoDB: http://dev.mysql.com/doc/refman/5.5/en/forcing-innodb-recovery.html InnoDB: for more information. This kind of error happens for a lot of tables. I know I can use dump, but the database is large, ca. 70GB and the systems are slow (old), so would like to get this replication to work with data transfer. What should I try to solve this issue?

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