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• How to run a WebPy server on port 8080 using DDNS of dlink router and to access this site from internet?

  - by nuke1010

  I have two major issue with setting up a web server using my dlink DIR-600L router. Issue 1: I run a WebPy server on port 8080. But the DDNS service providers (like dlinkddns.com or dyndns.org) only allows port 80. I can run the server in port 80 with sudo command. But my server become vulnerable if i give root access. So I tried port forwarding in the router and server. But no use. I don't know if I done that correctly. Issue 2: Even though the server runs on port 80, I can access my site from my local machines only using registered domain names ( say, nikz.dyndns.org). No one on internet cannot load this site even when its totally up. As I observed server log, the request from other clients never reached my server. I need to run this server on port 8080 and i need to access this site from internet. How can I do it? any idea?

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• who has files open on a linux server

  - by Robert

  I have the fairly common task of finding who has files open on our Linux (Ubuntu ) file server in our Windows environment. We use Samba on the network and I use Putty from my workstation to establish a shell window to run bash scripts. I have been using something like this to find what files are open: (this returns a list of process ids with each open file) Robert:$ sudo lsof | grep "/srv/office/some/folder" Then, I follow up with something like this to show who owns the process: (this returns the name of the machine on the network using the IP4 protocol who owns the process) Robert:$ sudo lsof -p 27295 | grep "IPv4" Now I know the windows client who has a file open and can take action from there. As you can tell this is not difficult but time consuming. I would prefer to have a windows application I can run that would just give me what I want. So, I have been thinking about creating some process I can run on Linux that listens on a port and then returns a clean list of all open files with the IP address of the host who has the file open. Then, a small windows client application that can send the request on the port. It seems like this should be a very common need but I can not find anything like this that has been done before. Any suggestions?

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• mod_deflate doesn't work [closed]

  - by kikio

  I want to gzip my static files. so put this in .htaccess: <IfModule mod_deflate.c> AddOutputFilterByType DEFLATE text/text text/html text/plain text/xml text/css application/x-javascript application/javascript </IfModule> and looked for mod_deflate in phpinfo() output Loaded Modules section, and I found it. But when I track server responses with Firebug, no gzipped file can be found: HTTP/1.1 200 OK Date: Sat, 08 Sep 2012 21:41:21 GMT Last-Modified: Sat, 08 Sep 2012 21:26:04 GMT Accept-Ranges: bytes Cache-Control: max-age=604800 Expires: Sat, 15 Sep 2012 21:41:21 GMT Vary: Accept-Encoding Keep-Alive: timeout=3, max=50 Connection: Keep-Alive Content-Type: text/css Content-Length: 18206 What's the problem? I'm sure I have mod_deflate enabled (according to php apache_get_modules()). UPDATE: the request headers: GET /d/jquery-ui.css HTTP/1.1 Host: 127.0.0.1 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:15.0) Gecko/20100101 Firefox/15.0.1 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: en-us,en;q=0.5 Accept-Encoding: gzip, deflate DNT: 1 Connection: keep-alive Pragma: no-cache Cache-Control: no-cache

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• What does a DHCP-client consider to be the "best" answer?

  - by Nils

  We have training rooms where normally Windows XP is installed (via PXE). The "normal" DNS/DHCP infrastructure are Windows-Servers. The training room has its own VLAN (different from the Windows servers), so there is most propably an IP helper for DHCP requests active on the Cisco router where all PCs from that room are connected to. Now we wanted to convert some of the PCs to Linux instead. The idea was: Put our own Laptop with a DHCP server into the VLAN of the room and override the "normal" DHCP response. The idea was that this should work, since a directly attached DHCP server in that VLAN should have a faster response-time than the "normal" DHCP server located some hops away from that VLAN. It turned out that this did not work. We had to manually release the lease on the original DHCP server to get it working. On the Laptop we did see the client requesting the IP and "our" dhcp was sending NACKs to the Windows IP request, before that we did offer our own response. Old Question: Why did this not work out as expected? What is making the PC regain its old lease? Update 2012-08-08: The regain-issue has been explained in the DHCP-RFC. Now this explains why the PC regains its old lease. Now we do release the IP from the Windows-DHCP-server before giving it another try. Again - the Windows-DHCP-server wins. I suspect that there is some algorithm for the dhcp-client which determines the "best" dhcp-answer for the client. The new question is: How does the client choose the "best" answer?

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• NetApp NDMP backup with BE 2010 R2 works, restore fails

  - by uuwe

  Hi, I'm having some issues with a new Backup Exec 2010 R2 installation. I configured a NetApp FAS2020 as an NDMP device and want to backup files from the NAS to a tape drive connected to my backup server. I set up ndmpd according to this document (http://www.symantec.com/business/support/index?page=content&id=TECH48957) and created a separate backup user (http://filers.blogspot.com/2006/09/setting-veritas-netbackup-with-non.html). Backup works perfectly, but restoring any file gives me an authentication failed error. The NDMP device has a "global" ndmp user configured in the device tab (tried this with the newly created ndmpd backup user and the netapp root) and I can also configure separate resource credentials in the BE restore job. I have tried setting the same accounts for the "global" ndmp device and the restore credentials and have also tried setting different accounts for them. NDMP debug level is at 5 and this is what shows up in /etc/messages. The session is closed immediately after it has been granted. 16:12:07 PST [Java_Thread:info]: ndmpdserver: ndmpd.access allowed for version = 4, sessionId = 51, from src ip = 192.168.11.17, dst ip = FAS2020-1/192.168.11.75, src port = 50857, dst port = 10000 16:12:07 PST [Java_Thread:info]: Ndmpd51: ndmpd session closed successfully for version = 4, sessionId = 51, from src ip = 192.168.11.17, dst ip = FAS2020-1/192.168.11.75, src port = 50857, dst port = 10000 Running wireshark on the backup server doesn't produce much. It shows a SYN - SYN/ACK - NDMP CONNECT_CLOSE Request from the backup server. The Resource Credentials for the restore job behave very oddly. If I enter NDMP credentials and do "Test All" it fails. If I use my regular domain backup account, it is successful. There are no failed or succeeded logons in the NetApp ndmp log and tracing this check shows that it doesn't even connect to the NAS. This makes me think that this is more likely flaky BE behaviour rather than misconfiguration of the NAS. Here is the options ndmp output: FAS2020-1 options ndmp ndmpd.access all ndmpd.authtype challenge ndmpd.connectlog.enabled on ndmpd.enable on ndmpd.ignore_ctime.enabled off ndmpd.offset_map.enable on ndmpd.password_length 16 ndmpd.preferred_interface disable ndmpd.tcpnodelay.enable off

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• Deploying concrete5 on nginx

  - by Nithin

  I have a concrete5 site that works 'out of the box' in apache server. However I am having a lot of trouble running it in nginx. The following is the nginx configuration i am using: server { root /home/test/public; index index.php; access_log /home/test/logs/access.log; error_log /home/test/logs/error.log; location / { # First attempt to serve request as file, then # as directory, then fall back to index.html try_files $uri $uri/ index.php; # Uncomment to enable naxsi on this location # include /etc/nginx/naxsi.rules } # pass the PHP scripts to FastCGI server listening on unix socket # location ~ \.php($|/) { fastcgi_pass unix:/tmp/phpfpm.sock; fastcgi_split_path_info ^(.+\.php)(/.+)$; fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name; fastcgi_param PATH_INFO $fastcgi_path_info; include fastcgi_params; } location ~ /\.ht { deny all; } } I am able to get the homepage but am having problem with the inner pages. The inner pages display an "Access denied". Possibly the rewrite is not working, in effect I think its querying and trying to execute php files directly instead of going through the concrete dispatcher. I am totally lost here. Thank you for your help, in advance.

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• Is the sysadmin/netadmin the defacto project planner at your organization?

  - by gft74

  At my company it has somehow over the past few years slowly become my job to come up with a project plan, milestones and time lines for deployment of developer applications. Typical scenario: My team receives a request for a new website/db combo and date for deployment. I send back a questionnaire for the developer to fill out on all the reqs for the site (ssl? db? growth projections etc.) After I get back all the information, the head of development wants a well developed document of what servers will it live on why those servers what is the time line for creating the resources step-by-step SOP for getting the application on the server and all related resources created (dns, firewall, load balancer etc.) I maybe just whining but it feels like this is something better suited to our Project Management staff (which we have) or to the developer. I understand that I need to give them a time-line on creating the resources, but still feel like this is overkill. We already produce documentation on where everything lives and track configuration changes to equipment. How do other sysadmin folks handle this?

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• OpenSSL: how to setup an OCSP server for checking third-party certificates?

  - by StackedCrooked

  I am testing the Certificate Revocation functionality of a CMTS device. This requires me to setup a OCSP responder. Since it will only be used for testing I assume that the minimal implementation provided by OpenSSL should suffice. I have extracted the a certificate from a cable modem, copied it to my PC and converted it to the PEM format. Now I want to register it in the OpenSSL OCSP database and start a server. I have completed all these steps, but when I do a client request my server invariably responds with "unknown". It seems to be completely unaware of my certificate's existence. I would greatly appreciate if anyone would be willing to have a look at my code. For your convenience, I have created a single script consisting of a sequential list of all used commands, from setting up the CA until starting the server: http://code.google.com/p/stacked-crooked/source/browse/trunk/Misc/OpenSSL/AllCommands.sh You can also find the custom config file and the certificate that I am testing with: http://code.google.com/p/stacked-crooked/source/browse/trunk/Misc/OpenSSL/ Any help would be greatly appreciated.

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• OpenSSL: how to setup an OCSP server for checking third-party certificates?

  - by StackedCrooked

  I am testing the Certificate Revocation functionality of a CMTS device. This requires me to setup a OCSP responder. Since it will only be used for testing I assume that the minimal implementation provided by OpenSSL should suffice. I have extracted the a certificate from a cable modem, copied it to my PC and converted it to the PEM format. Now I want to register it in the OpenSSL OCSP database and start a server. I have completed all these steps, but when I do a client request my server invariably responds with "unknown". It seems to be completely unaware of my certificate's existence. I would greatly appreciate if anyone would be willing to have a look at my code. For your convenience, I have created a single script consisting of a sequential list of all used commands, from setting up the CA until starting the server: http://code.google.com/p/stacked-crooked/source/browse/trunk/Misc/OpenSSL/AllCommands.sh You can also find the custom config file and the certificate that I am testing with: http://code.google.com/p/stacked-crooked/source/browse/trunk/Misc/OpenSSL/ Any help would be greatly appreciated.

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• Error in Apache: /var/run/apache2 not found

  - by Julen

  This is more self-answered question but since it drove me crazy I would like to share with the community and maybe someone can tell me why it happened or what it caused. The thing is I wanted to install in my Ubuntu 10.4 machine a CGI app, one built in the samples that come with the gSOAP toolkit. My intention was to access those from ASP .NET machine. Regular Ubuntu does not come with Apache so I install it from Sypnatic. Pretty easy. I followed this How to Install Apache2 webserver with PHP,CGI and Perl Support in Ubuntu Server. Instead of apache.conf I tweaked httpd.conf since a college here used that file instead of the first to put his Apache running. Besides I was able to access his CGI from my ASP .NET but mysteriously I could not from mine, I was getting always "The request failed with HTTP status 503: Service Temporarily Unavailable". Checking Apache error.log I found these messages: No such file or directory: unable to connect to cgi daemon after multiple tries: /home/julen/htdocs/cgi-bin/calcserver And looking more carefully whenever I restarted Apache I got this other message No such file or directory: Couldn't bind unix domain socket /var/run/apache2/cgisock. cgid daemon failed to initialize I am pretty new with Ubuntu and I could not think that Apache and Synaptic made a mistake in the installation process of the server, but it is true that the /var/run/apache2 was missing whereas in my college's computer was not. I tried to find and "elegant" solution but I found a post from 2006 that had an slight reference to it. Finally I decided to create the folder myself (as root) and then everything worked fine. Hope this helps others if they encounter a similar problem. Still I have the doubt why the folders was not created in the first place. Best, Julen.

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• Getting a "403 access denied" error instead of serving file (using django, gunicorn nginx)

  - by Finglish

  Getting a "403 access denied" error instead of serving file (using django, gunicorn nginx) I am attempting to use nginx to serve private files from django. For X-Access-Redirect settings I followed the following guide http://www.chicagodjango.com/blog/permission-based-file-serving/ Here is my site config file (/etc/nginx/site-available/sitename): server { listen 80; listen 443 default_server ssl; server_name localhost; client_max_body_size 50M; ssl_certificate /home/user/site.crt; ssl_certificate_key /home/user/site.key; access_log /home/user/nginx/access.log; error_log /home/user/nginx/error.log; location / { access_log /home/user/gunicorn/access.log; error_log /home/user/gunicorn/error.log; alias /path_to/app; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header Host $http_host; proxy_redirect off; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Scheme $scheme; proxy_pass http://127.0.0.1:8000; proxy_connect_timeout 100s; proxy_send_timeout 100s; proxy_read_timeout 100s; } location /protected/ { internal; alias /home/user/protected; } } I then tried using the following in my django view to test the download: response = HttpResponse() response['Content-Type'] = "application/zip" response['X-Accel-Redirect'] = '/protected/test.zip' return response but instead of the file download I get: 403 Forbidden nginx/1.1.19 Please note: I have removed all the personal data from the the config file, so if there are any obvious mistakes not related to my error that is probably why. My nginx error log gives me the following: 2012/09/18 13:44:36 [error] 23705#0: *44 directory index of "/home/user/protected/" is forbidden, client: 80.221.147.225, server: localhost, request: "GET /icbdazzled/tmpdir/ HTTP/1.1", host: "www.icb.fi"

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• Where to place Nginx IP blacklist config file?

  - by ProfessionalAmateur

  I have an Nginx web server hosting two sites. I created a blockips.conf file to blacklist IP addresses that are constantly probing the server and included this file in the nginx.conf file. However in my access logs for the sites I still see these IP addresses showing up. Do I need to include the black list in each site's conf instead of the global conf for Nginx? Here is my nginx.conf user nginx; worker_processes 1; error_log /var/log/nginx/error.log warn; pid /var/run/nginx.pid; events { worker_connections 1024; } http { include /etc/nginx/mime.types; default_type application/octet-stream; log_format main '$remote_addr - $remote_user [$time_local] "$request" ' '$status $body_bytes_sent "$http_referer" ' '"$http_user_agent" "$http_x_forwarded_for"'; access_log /var/log/nginx/access.log main; sendfile on; keepalive_timeout 65; include /etc/nginx/conf.d/*.conf; # Load virtual host configuration files. include /etc/nginx/sites-enabled/*; # BLOCK SPAMMERS IP ADDRESSES include /etc/nginx/conf.d/blockips.conf; } blockips.conf deny 58.218.199.250; access.log still shows this IP address. 58.218.199.250 - - [27/Sep/2012:06:41:03 -0600] "GET http://59.53.91.9/proxy/judge.php HTTP/1.1" 403 570 "-" "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)" "-" What am I doing incorrectly?

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• How to get my W2003-server (back) into the web (after setting up bridged networking)

  - by MBaas

  I have recently set up Virtualbox on a W2003-Server (which is also used as webserver, accessed from the web). My vbox worked nicely, but then I wanted more, I wanted to have the vm appear in the intranet like any ordinary pc. I was advised to setup bridged networking as opposed to NAT. I did so, and in the server's network connections have bridged the LAN-Connection and the "VirtualBox Host-Only Network" (yes, it says "host only network", but I assure that VBox networking is configured to use network bridge). So now my VM is visible in the intranet and it also has www-accesss, the server can also access the web. The only problem that came up is that the server is no longer accessible from the web. I've traced an HTTP-Request and it says "Can't connect to *:80 (connect: No route to host)". So maybe something in the router's config needs to be adjusted (yeah, well, the server's IP-Address changed from 192.168.1.199 to ...198). So I went into the router-config, reviewed port-forwarding for port 80 and adjusted the IP there, but it still didn't work. Unsure if it was a router-problem or rather something in the server's config, I've setup a "demilitarized zone" in the router and have put the server into it. (My understanding is that this would put the server straight into the web...) But the result of the HTTP-Requests is still the same :(

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• What are best practices on virtual lab/test bed architecture?

  - by WooYek

  I am currently preparing a new small virtual environment for development and testing with Windows Server + SQL Server + AD + Sharepoint + Exchange + IIS(ASP.NET) + Biztalk + ?, for a small (up to 5) dev team. What are pros and cons on different approaches, eg. splitting up over different machines or packing everything up per machine. I your experience what are the best practices I should follow in terms of architecture and various system/servers placement. What to share and what to split per person. I would like to achieve some flexibility for the dev and testing process (so teammebers would not be steeping on each other's toes) and limit administrative effort needed to propagate settings, integrate work items and revert changes when something breaks up. It's not supposed to be an everyday development working environment, more a tier 2 developer testing environment, and not yet an integration or QA testing environment with formal change process. IMO the two borderline solutions are: creating one all-inclusive machine for each dev team member giving them freedom to manage creating shared environment managed by the one with somehow formalized change request process What golden mean would you recommend, and why?

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• LDAP over SSL with an EFI Fiery printer

  - by austinian

  I've got a printer with a Fiery running 8e Release 2. I can authenticate users against AD using the LDAP configuration, but I can only get it to work if I don't use SSL/TLS, and only if I use SIMPLE authentication. Right now, it's authenticating using a fairly low-impact user, but it's also the only system on our network that's not using LDAPS. I can get AD info fine over LDAPS using ldp.exe from my machine, our firewall, our mail filter, our linux boxes, etc. The only problem child is the Fiery. I've added the LDAP server certificate as a trusted cert to the Fiery, but after I check the box for Secure Communication and change the port to 636, pressing Validate results in a dialog box coming up saying: LDAP Validation Failed Server Name invalid or server is unavailable. I've tried changing the server name to use just the name, the FQDN, and the IP address, and changed it to another server, just to see if it was just this AD server that was fussy with the Fiery. EDIT: removed LDP output, added packet capture analysis from wireshark: The conversation seems pretty normal to me, up to the point where the Fiery terminates the connection after the server sends back a handshake response. Maybe they messed up their TLS implementation? I'm trying support, but it's been fairly useless so far. The cert is a SHA-2 (sha256RSA) 2048-bit certificate. Also, it looks like the Fiery is specifying TLS 1.0. Looking at http://msdn.microsoft.com/en-us/library/windows/desktop/aa374757(v=vs.85).aspx, I'm not seeing SHA256 and TLS 1.0 combination being supported by SChannel. headdesk perhaps that's why, after the DC changes the cipher spec, the connection is terminated by the Fiery? TLS 1.1 and 1.2 are enabled on the DC. Wireshark conversation: DC: 172.17.2.22, Fiery: 172.17.2.42 No. Time Source Source Port Destination Destination Port Protocol Length Info 1 0.000000000 172.17.2.42 48633 172.17.2.22 ldaps TCP 74 48633 > ldaps [SYN] Seq=0 Win=5840 Len=0 MSS=1460 SACK_PERM=1 TSval=3101761 TSecr=0 WS=4 2 0.000182000 Dell_5e:94:e3 Broadcast ARP 60 Who has 172.17.2.42? Tell 172.17.2.22 3 0.000369000 TyanComp_c9:0f:90 Dell_5e:94:e3 ARP 60 172.17.2.42 is at 00:e0:81:c9:0f:90 4 0.000370000 172.17.2.22 ldaps 172.17.2.42 48633 TCP 74 ldaps > 48633 [SYN, ACK] Seq=0 Ack=1 Win=8192 Len=0 MSS=1460 WS=256 SACK_PERM=1 TSval=67970573 TSecr=3101761 5 0.000548000 172.17.2.42 48633 172.17.2.22 ldaps TCP 66 48633 > ldaps [ACK] Seq=1 Ack=1 Win=5840 Len=0 TSval=3101761 TSecr=67970573 6 0.001000000 172.17.2.42 48633 172.17.2.22 ldaps TLSv1 147 Client Hello 7 0.001326000 172.17.2.22 ldaps 172.17.2.42 48633 TCP 1514 [TCP segment of a reassembled PDU] 8 0.001513000 172.17.2.22 ldaps 172.17.2.42 48633 TCP 1514 [TCP segment of a reassembled PDU] 9 0.001515000 172.17.2.42 48633 172.17.2.22 ldaps TCP 66 48633 > ldaps [ACK] Seq=82 Ack=1449 Win=8736 Len=0 TSval=3101761 TSecr=67970573 10 0.001516000 172.17.2.42 48633 172.17.2.22 ldaps TCP 66 48633 > ldaps [ACK] Seq=82 Ack=2897 Win=11632 Len=0 TSval=3101761 TSecr=67970573 11 0.001732000 172.17.2.22 ldaps 172.17.2.42 48633 TCP 1514 [TCP segment of a reassembled PDU] 12 0.001737000 172.17.2.22 ldaps 172.17.2.42 48633 TLSv1 1243 Server Hello, Certificate, Certificate Request, Server Hello Done 13 0.001738000 172.17.2.42 48633 172.17.2.22 ldaps TCP 66 48633 > ldaps [ACK] Seq=82 Ack=4345 Win=14528 Len=0 TSval=3101761 TSecr=67970573 14 0.001739000 172.17.2.42 48633 172.17.2.22 ldaps TCP 66 48633 > ldaps [ACK] Seq=82 Ack=5522 Win=17424 Len=0 TSval=3101761 TSecr=67970573 15 0.002906000 172.17.2.42 48633 172.17.2.22 ldaps TLSv1 78 Certificate 16 0.004155000 172.17.2.42 48633 172.17.2.22 ldaps TLSv1 333 Client Key Exchange 17 0.004338000 172.17.2.22 ldaps 172.17.2.42 48633 TCP 66 ldaps > 48633 [ACK] Seq=5522 Ack=361 Win=66304 Len=0 TSval=67970573 TSecr=3101762 18 0.004338000 172.17.2.42 48633 172.17.2.22 ldaps TLSv1 72 Change Cipher Spec 19 0.005481000 172.17.2.42 48633 172.17.2.22 ldaps TLSv1 327 Encrypted Handshake Message 20 0.005645000 172.17.2.22 ldaps 172.17.2.42 48633 TCP 66 ldaps > 48633 [ACK] Seq=5522 Ack=628 Win=66048 Len=0 TSval=67970574 TSecr=3101762 21 0.010247000 172.17.2.22 ldaps 172.17.2.42 48633 TLSv1 125 Change Cipher Spec, Encrypted Handshake Message 22 0.016451000 172.17.2.42 48633 172.17.2.22 ldaps TCP 66 48633 > ldaps [FIN, ACK] Seq=628 Ack=5581 Win=17424 Len=0 TSval=3101765 TSecr=67970574 23 0.016630000 172.17.2.22 ldaps 172.17.2.42 48633 TCP 66 ldaps > 48633 [ACK] Seq=5581 Ack=629 Win=66048 Len=0 TSval=67970575 TSecr=3101765 24 0.016811000 172.17.2.22 ldaps 172.17.2.42 48633 TCP 60 ldaps > 48633 [RST, ACK] Seq=5581 Ack=629 Win=0 Len=0

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• Windows - Website unaccessible only on windows pcs in LAN

  - by DorentuZ

  For serveral days now, a website isn't accessible on a single pc in the LAN. On the other pc's, it works just fine. And it's just a single website that's not accessible as far as I know of. The website generates a timeout on every single web browser I've tried (IE8, Firefox and Chrome). However, traceroute, nmap and telnet all work just fine. I've even tried multiple user accounts and safe mode, but that didn't work either. As a side note: using a linux live cd did work and I could access the website without any problems. The hosts file is the windows default, the ip- and dns settings on the network adapter normal as well. No strange processes are running and no viruses found. According to tcpview and netstat there are connections to the domain, but every request in the browser results in a timeout.. Any idea what's happening? Update: All of the computers on the network running Windows (any version) are showing this problem now. The website is still working under linux and mac osx. So, it has to be related to some kind of windows update (although I haven't installed any on one computer in the past week, which I've set to do manual updates only)..

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• Dynamic ARP Entries turning into Static ARP entries

  - by Zach

  I recently acquired a client that has a strange ARP caching issue on one of thier servers. I have a server that will eventually start turning it's dynamic ARP entries into static ARP entries. This causes problems because when the machine that has a static ARP entries on this server receives a new IP via DHCP, then the server is not able to communicate with the clients. Clearing the ARP cache resolves the issue and the server is fine for about a week and then it starts slowly turning ARP entries into static ARP entries. I haven't narrowed it down to when or how many it starts to do, but slowly you start seeing 1 static ARP and then 5 and then 10. The server in question is a Windows Server 2003 SP2. It is a DC, DHCP, and DNS server. I've checked the DHCP scope options and there's nothing in there that would indicate anything to do with static ARP entries. The only thing different between this DNS server and our other DNS server is that the 'Dynamically Update DNA A and PTR records for DHCP clients that do not request updates' is checked on the problematic server. I've done a bit of research about this and it seems that this may happen if any PXE type services are running, from what I can tell, there is nothing running a PXE server. I'm a bit lost as I have never seen dynamic ARP entries start to turn into static ARP entries. Right now my solution is a schedule task that runs every 24 hours to clear the ARP cache (arp -d *). I would like to not rely on this schedule task. Has anybody seen this before or have any suggestions on how to troubleshoot this?

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• How to have SSL on Amazon Elastic Load Balancer with a Gunicorn EC2 server?

  - by Riegie Godwin

  I'm a self taught back end engineer so I'm learning all of this stuff as I go along. For the longest time, I've been using basic authentication for my users. Many developers are advising against this approach since each request will contain the username & password in clear text. Anyone with the right skills can sniff on the connection between my iOS application and my Django/Gunicorn Server and obtain their password. I wouldn't want to put my user's credentials at risk so I would like to implement a more secure way of authentication. SSL seems to be the most viable option. My server doesn't serve any static content or anything crazy of that sort. All the server does is send and receive "json" responses from and to my iOS application. Here is my current topology. iOS application ------ Amazon Elastic Load Balancer ------- EC2 Instances running HTTP Gunicorn. Gunicorn runs on port 8000. I have a CNAME record from GoDaddy for the Amazon Elastic Load Balancer DNS. So instead of using the long DNS to make requests, I just use server.example.com. To interact with my servers I send and receive requests to server.example.com:8000/ This setup works and has been solid. However I need to have a more secure way. I would like to setup SSL between my iOS application and my Elastic Load Balancer. How can I go about doing this? Since I am only sending json responses to my application, do I really need to buy a certificate from a CA or can I create my own? (since browsers will not be interacting with my servers. My servers are only designed to send json responses to my iOS application).

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• Adobe Reader Wants Sensitive Email Details

  - by KDM

  When I run Adobe Reader, it tells me: Either there is no default mail client or the current mail client cannot fulfill the messaging request. Please run Microsoft Outlook and set it as the default mail client. I have a couple of issues with this: 1) It presupposes everyone has Microsoft Office installed. Not all home users have the budget or inclination for this. 2) It presupposes everyone wants Microsoft Outlook to be their default mail client. 3) I have Microsoft Office (incl. Outlook) installed and set as my default mail client. Even if I make it the default mail client from within the Adobe Reader Preferences, that doesn't stop the dialog appearing. 4) I thought I'd give Adobe Reader a new email address in the preferences, just to get it to stop bugging me. I notice, though, that it want's the SMTP and POP addresses and the account password? They have got to be kidding? I just want to view PDF files. How do I get the message to go away without telling Adobe my life story, giving them my mother's maiden name, my favourite movie, my place of birth, the name of my first goldfish and emptying the contents of my wallet for them?

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• ajax.googleapis.com stopping my Firefox

  - by Oscar Reyes

  Today for some strange reason, Firefox stops working properly because it is trying to fetch something from ajax.googleapis.com. Is there something I can do to avoid this? Safari and Chrome work just fine. I tried uninstalling Firebug and clearing the cache. The only thing that worked was disabling the JavaScript altogether. This seems to be the culprit link: http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js What can I do? EDIT I think I have found where the problem is. My proxy is serving one byte at a time the file, so firefox consume it at that peace. What I don't understand is why Safari and Chrome takes it right away. What I did last night was, leave the FF open all the night to give him change to load the file, my hope was that I got cached and the next time there was no need to go for it. Today in the morning, the page load successfully but the page was not cached, because the next request failed the same. Here's a video showing the problem:

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• RabbitMQ message consumers stop consuming messages

  - by Bruno Thomas

  Hi server fault, Our team is in a spike sprint to choose between ActiveMQ or RabbitMQ. We made 2 little producer/consumer spikes sending an object message with an array of 16 strings, a timestamp, and 2 integers. The spikes are ok on our devs machines (messages are well consumed). Then came the benchs. We first noticed that somtimes, on our machines, when we were sending a lot of messages the consumer was sometimes hanging. It was there, but the messsages were accumulating in the queue. When we went on the bench plateform : cluster of 2 rabbitmq machines 4 cores/3.2Ghz, 4Gb RAM, load balanced by a VIP one to 6 consumers running on the rabbitmq machines, saving the messages in a mysql DB (same type of machine for the DB) 12 producers running on 12 AS machines (tomcat), attacked with jmeter running on another machine. The load is about 600 to 700 http request per second, on the servlets that produces the same load of RabbitMQ messages. We noticed that sometimes, consumers hang (well, they are not blocked, but they dont consume messages anymore). We can see that because each consumer save around 100 msg/sec in database, so when one is stopping consumming, the overall messages saved per seconds in DB fall down with the same ratio (if let say 3 consumers stop, we fall around 600 msg/sec to 300 msg/sec). During that time, the producers are ok, and still produce at the jmeter rate (around 600 msg/sec). The messages are in the queues and taken by the consumers still "alive". We load all the servlets with the producers first, then launch all the consumers one by one, checking if the connexions are ok, then run jmeter. We are sending messages to one direct exchange. All consumers are listening to one persistent queue bounded to the exchange. That point is major for our choice. Have you seen this with rabbitmq, do you have an idea of what is going on ? Thank you for your answers.

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• Plesk wildcard subdomain not working

  - by avdgaag

  I'm trying to set up a wildcard subdomain on my VPS. Ultimately I want to end up with this: main site: my.domain.tld subdomain: sub1.my.domain.tld - should end up serving my.domain.tld/sub1 I am using plesk 8.6. I have created a DNS A record pointing at my VPS' IP. I have then restarted the DNS server and waited up to 24 hours. But trying ping sub1.my.domain.tld results in an unknown host error. So I know there's more stuff involved, configuring apache etc. But so far, I cannot even get the subdomain working at all, let alone serve up the right content. I have also tried a CNAME record, to no effect. I have also tried creating a regular subdomain with a fixed name, which also does not work. Pre-configured subdomains DO work, like ftp.my.domain.tld or mail.my.domain.tld. I am clearly missing something here, but my hosting provider charges a small fortune for any support request not involving hardware physically burning down, so I'm hesitant to ask them. Any ideas?

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• Open Source Chef Server can't upload cookbook

  - by veilig

  I just setup the open source chef server on an Ubuntu 12.04 EC2 instance, I've setup my webui and am able to get responses from my knife commands ie: knife node list, knife client list, knife user list, etc... I'm able to update roles, databags, environments, etc... but I cannot upload any cookbooks. I'm running my workstation on Mac OSX. I keep getting this output at the end of my command knife cookbook upload -VV curl. Doesn't matter what cookbook I upload, or if I upload them all - I keep getting the same response DEBUG: Chef::HTTP calling Chef::HTTP::ValidateContentLength#handle_response DEBUG: Chef::HTTP calling Chef::HTTP::RemoteRequestID#handle_response DEBUG: Chef::HTTP calling Chef::HTTP::Authenticator#handle_response DEBUG: Chef::HTTP calling Chef::HTTP::Decompressor#handle_response DEBUG: Chef::HTTP calling Chef::HTTP::CookieManager#handle_response DEBUG: Chef::HTTP calling Chef::HTTP::JSONToModelOutput#handle_response /usr/local/lib/ruby/gems/2.1.0/gems/chef-12.0.0.alpha.1/lib/chef/http/json_output.rb:51:in `handle_response': undefined method `chomp' for nil:NilClass (NoMethodError) from /usr/local/lib/ruby/gems/2.1.0/gems/chef-12.0.0.alpha.1/lib/chef/http.rb:229:in `block in apply_response_middleware' from /usr/local/lib/ruby/gems/2.1.0/gems/chef-12.0.0.alpha.1/lib/chef/http.rb:227:in `each' from /usr/local/lib/ruby/gems/2.1.0/gems/chef-12.0.0.alpha.1/lib/chef/http.rb:227:in `inject' from /usr/local/lib/ruby/gems/2.1.0/gems/chef-12.0.0.alpha.1/lib/chef/http.rb:227:in `apply_response_middleware' from /usr/local/lib/ruby/gems/2.1.0/gems/chef-12.0.0.alpha.1/lib/chef/http.rb:144:in `request' from /usr/local/lib/ruby/gems/2.1.0/gems/chef-12.0.0.alpha.1/lib/chef/http.rb:118:in `put' from /usr/local/lib/ruby/gems/2.1.0/gems/chef-12.0.0.alpha.1/lib/chef/cookbook_uploader.rb:123:in `block in uploader_function_for' from /usr/local/lib/ruby/gems/2.1.0/gems/chef-12.0.0.alpha.1/lib/chef/util/threaded_job_queue.rb:52:in `call' from /usr/local/lib/ruby/gems/2.1.0/gems/chef-12.0.0.alpha.1/lib/chef/util/threaded_job_queue.rb:52:in `block (3 levels) in process' from /usr/local/lib/ruby/gems/2.1.0/gems/chef-12.0.0.alpha.1/lib/chef/util/threaded_job_queue.rb:50:in `loop' from /usr/local/lib/ruby/gems/2.1.0/gems/chef-12.0.0.alpha.1/lib/chef/util/threaded_job_queue.rb:50:in `block (2 levels) in process'INFO: HTTP Request Returned 204 No Content:

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• apache 2.4 redirect within virtualhost

  - by user129545

  I have a couple http (port 80) vhosts that I want to redirect to http if an https request is made to them. Apparently some things have changed with Apache 2.4 (NameVirtualHost not used like it was in the past, etc). Apache 2.4 on centos 5.5, This is all using a single ip for all vhosts below, I don't have multiple ip's on this box, my /usr/local/apache2/conf/extra/httpd-vhosts.conf : # <VirtualHost www.dom1.com:80> ServerName www.dom1.com ServerAlias dom1.com DocumentRoot /usr/local/apache2/htdocs/dom1/wordpress </VirtualHost> <VirtualHost webmail.dom2.com:443> ServerName webmail.dom2.com DocumentRoot /usr/local/apache2/htdocs/webmail SSLEngine On SSLCertificateFile /usr/local/apache2/webmail.crt SSLCertificateKeyFile /usr/local/apache2/webmail.key </VirtualHost> # my /usr/local/apache2/conf/extra/httpd-ssl.conf, # Listen 443 SSLPassPhraseDialog builtin SSLSessionCache shmcb:/var/cache/mod_ssl/scache(512000) SSLSessionCacheTimeout 300 Mutex default SSLRandomSeed startup file:/dev/urandom 512 SSLRandomSeed connect builtin SSLCryptoDevice builtin # webmail.dom2.com works fine. Problem is I can connect to https://www.dom1.com, and it serves up the content from webmail.dom2.com. I want any https requests for www.dom1.com on port 443 to simply redirect to http://www.dom1.com on port 80. Thanks

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• Which ports are needed for NTLM (Windows Authentication) to connect to SQL Server?

  - by Adam Bellaire

  I've got SQL server running on a machine which is not in a domain, and which is not operating in mixed mode (it's running with "Windows Authentication"). I'm trying to connect to it from a Linux web server running freetds via TCP/IP, using NTLM to authenticate. The firewall on the SQL server is very restrictive. 1433 is open to my web server, but I'm getting conflicting information from the web on what additional ports (TCP/UDP) are needed for NTLM to succeed. It is currently fail; I can talk on 1433 to request NTLM, but the actual authentication always fails. One source says 137, 138, 139, but those are just the NetBIOS ports. Do I really need those? Another source says 135. Still others seem to say 1434... I can't make heads or tails of it. Dammit Jim, I'm a programmer, not a network administrator! EDIT: The exact error message: Msg 18452, Level 14, State 1, Server , Line 0 Login failed for user '(null)'. Reason: Not associated with a trusted SQL Server connection. Msg 20002, Level 9, State -1, Server OpenClient, Line -1 Adaptive Server connection failed I am attempting to connect with a remote machine username, i.e. 'servername\username'. Some sources recommend that I set up mirrored accounts on the local and remote machines, but the local machine is running Linux, not IIS under Windows.

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