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  • IIS7 failover cluster across datacenters

    - by Scott
    Hello, I have servers in two different datacenters with each datacenter getting static IPs. What I would like to do is setup the servers as IIS7 servers and allowing them to failover from datacenter to datacenter with little (or preferably) no interruption. Servers on both sides are running Windows Server 2008 x64 with IIS7 (or 7.5 if needed). I am interested in how to point DNS traffic to the new datacenter without manual human intervention. For example: Datacenter A: IP: 192.168.1.115 Servers: Server 2008 x64 w/ IIS 7 Datacenter B: IP: 192.168.1.220 Servers: Server 2008 x64 w/ IIS 7 Other information: Domain Name: Example.org Domain DNS: 192.168.1.115 If Datacenter A connectivity went down (broken service line, etc.) how does the traffic know to route to Datacenter B on 192.168.1.220? Thanks, Scott

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  • How would I setup reverse DNS for 2 email servers?

    - by Solignis
    I have an interesting DNS question (well interesting to me atleast). I just installed an hmail server in our remote office to act as an MX backup in the event our exchange server goes down. The 2 host names are mail.campbellsurvey.com mail2.campbellsurvey.com mail points to the address 98.XXX.91.XXX mail2 points to the address 70.XXX.190.XXX How would I setup a PTR record on the ISP end to reflect both hostnames? Does the PTR have to point to EXACTLY mail.campbellsurvey.com or can it point to just campbellsurvey.com? because right now anything passing through the primary static address in our pool (the one used for standard internet) is identified as mail.campbellsurvey.com. My only idea to fix this was to move the mail server to the next available address and give it only it the name mail.campbellsurvey.com but I wanted to see if there was another way. Thanks in advance.

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  • Can one have multiple name servers that don't all belong to the same TLD/provider?

    - by Simon
    In light of the GoDaddy outage we updated our name server list for our domain to include an additional name server provider. The list looks something like this: ns61.domaincontrol.com ns54.domaincontrol.com ns1.dreamhost.com ns2.dreamhost.com Both Godaddy and Dreamhost have zone entries to handle the A and MX records. The idea is that if one provider goes out the other will be a fall-back. However, when I tested my config with http://www.intodns.com/ I am getting a warning about SOA serials not being agreed. Have I misunderstood some fundamentals in name-server config? What can I do to prevent future problems?

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  • How to configure amavisd-new for only scanning on particular senders/servers?

    - by mailq
    I'd like to know how to configure amavisd-new to only scan for Spam on particular clients (IPs, CIDRs or hostnames) or alternatively sender's email domain. I know that it is possible to do it on a recipient's mail address but not on how to do it for the sender's mail address. It is even possible to do it on a recipient's IP address with policy banks. But my approach should be to be independent of recipient and only relay on the sender. What I want to accomplish is to only scan mails originating from Yahoo, Google, Hotmail and the other big senders. So it is easier to configure which senders should be observed than the ones that shouldn't. I known that it is easier to achieve on the MTA side, but that is not part of the question because I already go a solution on the MTA side. I want to do it on amavisd-new. And it doesn't help to know how to put senders on a whitelist, as this still means that the mail goes through all the scanning but then gets a high negative score. The mail shouldn't be scanned at all unless sent by the big players. So which parameters in amavisd-new is the right one to enable scanning for particular senders and only for these?

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  • Is it possible to run two servers in one system ?

    - by srikanth
    I have a small problem while trying to execute the wamp server. At present in my system I am running Apache server. I have a php application. for that I am trying to install wamp server in my system. wamp server is not running. I change the port no of wamp server as : in my C:\wamp\bin\apache\Apache2.2.11\conf\ I have httpd.conf file. in that I change listener and host name with another port no. then also it is not working.

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  • Apple, Time Capsule: can I use it for servers ?

    - by Patrick
    hi, i was wondering if I can use Time Capsule from a server. Let's say I have an ubuntu server, and I'm running some websites and web applications on it. I would install these appications on ubuntu but then store the "file folders" of each website or application (with images, videos, etc.. ) on Airport capsule and leave only the application files on the server. Is this feasable ? Thanks Patrick

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  • Is it possible to run two servers in one system ?

    - by srikanth
    hi, i have a small problem while trying to execute the wamp server. At present in my system i am running Apache server. i have a php application. for that i am trying to install wamp server in my system. wamp server is not running. i change the port no of wamp server as : in my C:\wamp\bin\apache\Apache2.2.11\conf\ i have httpd.conf file. in that i change listener and host name with another port no. then also it is not working. any one can you help me......... plz...

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  • Which IMAP flags are reliably supported across most mail servers?

    - by Ben Butler-Cole
    I am writing an application which reacts to emails sent to a mailbox. It retrieves the emails via IMAP. It will be deployed to a number of systems where I do not control the mail server configuration. I would like to use IMAP flags to indicate which messages have been handled. Are the system flags sufficiently widely supported that I can reasonably depend on them in my application? Are user-defined flags sufficiently widely supported? (If the answer is "ha ha, not a chance", then I shall use folders instead.) Thanks -Ben

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  • I think I have multiple postgresql servers installed, how do I identify and delete the 'extra' ones?

    - by Guided33
    I seem to have a few installations of postgresql on my machine somehow. I'm not sure if this is a mistake or, if Ubuntu for some odd reason duplicates direcotories and keeps them elsewhere. I have a postgresql directory in /etc one in /usr/lib and one in /opt I'm properly confused at this point. How do I go about deleting the extra ones.which ones are he extra one? I also need to make sure that my 'pg' gem in my rails env is pointing towards the correct posgresql db server. Any thoughts on my issue would be huge.

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  • How should one manager external and internal DNS servers at the same time?

    - by erotsppa
    We run a mac network here in the office. We have an internal DNS server to manage the network. Everything is resolved to a local ip (for mail.mydomain.com etc). However, we also have an external DNS server for when our users are not in the office. However, isn't it a pain to have to manage two lists? Whenever you change something you have to change another? And you can't have one be a slave of another because the ip are sometimes different (for example mail.mydomain.com would point to a local ip in local dns server but an external ip in the external dns server). Any tricks?

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  • Why does StackExchange store images in imgur rather than its own servers? [migrated]

    - by martin's
    I am trying to understand the technical (and business) logic behind taking such an approach. Certainly SE isn't short of server or bandwidth resources. I don't think imgur is a CDN, so that can't be the reason. On the one hand one is giving up local control (meaning your files, your hardware) of the content. On the other, you don't have to use your own bandwidth, storage and resources. Then again, you depend on someone else for the reliability and up-time of your service.

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  • RabbitMQ - How I do configure servers for zero-downtime upgrades?

    - by Terence Johnson
    Having read through the docs and RabbitMQ in Action, creating a RabbitMQ cluster seems straightforward enough, but upgrading or patching an existing RabbitMQ cluster seems to require the whole cluster to be restarted. Is there a way to combine clustering, shovel, federation, and load balancing to make a rolling upgrade possible without losing queues or messages, or have I missed something slightly more obvious?

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  • Does Apache2 Configured as ReverseProxy Hide Cookies Set by Backend Servers?

    - by Ianthe
    I use Apache 2.2.16 as Reverse Proxy. For a static website, I don't have any issues. However, when began to use cookies, I've noticed that cookies are not being sent to the client. Here's a snippet of my config: <VirtualHost *:80> ServerName app.somewhere.com:80 ServerAlias app ProxyRequests Off ProxyPreserveHost On <Proxy *> Order deny,allow Allow from all </Proxy> ProxyPass /app http://10.x.x.x/app ProxyPassReverse /app http://10.x.x.x/app <Location /> Order allow,deny Allow from all </Location> </VirtualHost> But when I try to access the app server directly, I receive the cookies ok. Is this an expected behaviour for Apache2? I'm using HAProxy for another application that sends cookies to the client and I get all of them.

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  • Can a Windows 2003 Active Directory server act as a NTP server?

    - by Rob Nicholson
    Within our LAN, there are two Windows 2003 servers with the Active Directory role. Both these servers have the time service configured to query NTP servers on the internet for the accurate time. That works fine. I've just installed XenServer v5.6 and it's asked me for the IP address of an NTP server. Without tweaking the firewall, I cannot configure this server to reference an internet based NTP server. But can I configure it to use the IP address of the internal AD servers, i.e. do AD servers also act as NTP servers to other computers? Thanks, Rob.

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  • What Triggers a syncronization between Exchange 2007 Mail Store and Edge Servers?

    - by BillN
    We are using Exchange 2007 for our mail. In our configuration, we need to add an alias to each users mailbox. When we do, the Edge server, another Exchange 2007 box, will reject the alias with a User Unknown error until the next morning. I seem to recall that in Exchange 2003, you could force an update from the Management console, but I can not find a way in 2007. It is obvious that a sync job is scheduled to run each night, but I cannot find it.

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  • If I use openvpn, can vpn servers monitor my usernames/passwords?

    - by Duff
    Openvpn uses a type of encryption similar to ssl. This seems to suggest that even if I choose an incredibly shady VPN server, then my content will be secure. That is, the VPN server will be able to monitor what websites I patronize, but not the actual data I transfer. That said, I am not an expert at this type of thing. I wanted, therefore, to make sure that I understand correctly. Is it true that if I use openvpn that my username/passwords are secure, even if the VPN is untrustworthy? If not, why? (And how, if at all, can it be fixed?) Examples of things that I don't know much about that may (or may not! I honestly don't know much about this.) be related to my question are: DNS leakage, IPv6, tracking cookies, browser plugins and websites that don't support https.

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  • Naming standard for additional A records/IP addresses for IIS servers?

    - by serialhobbyist
    When you're adding another IP address to and IIS server, what naming standards do you use for the A records? Background: I've a bunch of sites on an IIS server which use (CNAME'd) host-headers and a single IP address. Server names (and A records) adhere to unfriendly (as in difficult-to-remember) naming standards whereas CNAMEs, and therefore host-headers, can be friendly. Now I've a need for several SSL certificates for different sites. I was thinking about using an additional IP address for each to-be-SSL'd site but still using friendly CNAMEs. So then I come to what to call the A record. What do you do? Related to this question.

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  • How to invalidate nginx reverse proxy cache in front of other nginx servers?

    - by Olivier Lance
    I'm running a Proxmox server on a single IP address, that will dispatch HTTP requests to containers depending on the requested host. I am using nginx on the Proxmox side to listen to HTTP requests and I am using the proxy_pass directive in my different server blocks to dispatch requests according to the server_name. My containers run on Ubuntu and are also running a nginx instance. I'm having troubles with caching on a particular website that is fully static: nginx keeps on serving me stale content after files updates, until I: Clear /var/cache/nginx/ and restart nginx or set proxy_cache off for this server and reload the config Here's the detail of my configuration: On the server (proxmox): /etc/nginx/nginx.conf: user www-data; worker_processes 8; pid /var/run/nginx.pid; events { worker_connections 768; # multi_accept on; use epoll; } http { ## # Basic Settings ## sendfile on; #tcp_nopush on; tcp_nodelay on; #keepalive_timeout 65; types_hash_max_size 2048; server_tokens off; # server_names_hash_bucket_size 64; # server_name_in_redirect off; include /etc/nginx/mime.types; default_type application/octet-stream; client_body_buffer_size 1k; client_max_body_size 8m; large_client_header_buffers 1 1K; ignore_invalid_headers on; client_body_timeout 5; client_header_timeout 5; keepalive_timeout 5 5; send_timeout 5; server_name_in_redirect off; ## # Logging Settings ## access_log /var/log/nginx/access.log; error_log /var/log/nginx/error.log; ## # Gzip Settings ## gzip on; gzip_disable "MSIE [1-6]\.(?!.*SV1)"; gzip_vary on; gzip_proxied any; gzip_comp_level 6; # gzip_buffers 16 8k; gzip_http_version 1.1; gzip_types text/plain text/css application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript; limit_conn_zone $binary_remote_addr zone=gulag:1m; limit_conn gulag 50; ## # Virtual Host Configs ## include /etc/nginx/conf.d/*.conf; include /etc/nginx/sites-enabled/*; } /etc/nginx/conf.d/proxy.conf: proxy_redirect off; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_hide_header X-Powered-By; proxy_intercept_errors on; proxy_buffering on; proxy_cache_key "$scheme://$host$request_uri"; proxy_cache_path /var/cache/nginx levels=1:2 keys_zone=cache:10m inactive=7d max_size=700m; /etc/nginx/sites-available/my-domain.conf: server { listen 80; server_name .my-domain.com; access_log off; location / { proxy_pass http://my-domain.local:80/; proxy_cache cache; proxy_cache_valid 12h; expires 30d; proxy_cache_use_stale error timeout invalid_header updating; } } On the container (my-domain.local): nginx.conf: (everything is inside the main config file -- it's been done quickly...) user www-data; worker_processes 1; error_log logs/error.log; events { worker_connections 1024; } http { include mime.types; default_type application/octet-stream; sendfile on; #tcp_nopush on; keepalive_timeout 65; gzip off; server { listen 80; server_name .my-domain.com; root /var/www; access_log logs/host.access.log; } } I've read many blog posts and answers before resolving to posting my own questions... most answers I can see suggest setting sendfile off; but that didn't work for me. I have tried many other things, double checked my settings and all seems fine. So I'm wondering whether I am not expecting nginx's cache to do something it's not meant to...? Basically, I thought that if one of my static files in my container was updated, the cache in my reverse proxy would be invalidated and my browser would get the new version of the file when it requests it... But I now have the sentiment I misunderstood many things. Of all things, I now wonder how nginx on the server can know about a file in the container has changed? I have seen a directive proxy_header_pass (or something alike), should I use this to let the nginx instance from the container somehow inform the one in Proxmox about updated files? Is this expectation just a dream, or can I do it with nginx on my current architecture?

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