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My goal is to implement SPDY protocol (a new experimental protocol by GOOGLE) on IIS servers.
SPDY is a TCP based application level protocol and as such I am guessing that I have to
work at TCP level (socket programing) as the built in extensions are for HTTP.
My problem is that once I write a socket programing code to do the same, where do I plug it into IIS7? WAS looks like a good candidate and if so, how do I go about doing it?
IIS has little or nothing to do with SPDY. IIS is just an application server that responds to HTTP requests handed off by the http.sys kernel mode driver. All HTTP requests in Windows are handled by this driver.
This is the level at which SPDY would be need to be implemented.
If you were to implement SPDY you'd need to have this as a shim driver between the TCP stack and http.sys, or maybe even write your own http.sys driver.
Alternatively you could write your own SPDY/HTTP stack but if you wanted to use this with IIS then you're in for a lot of work.
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I was learning nginx and as I found out that it is a load balancer helping to handle a loads of requests to a server. The question I wanted to ask is that as I also found out, nginx is best to be used when one server gets overloaded and we need to add up one more server. So, is it true that nginx is best to used ONLY when one server cannot handle the number of requests?
Although it looks like Nginx should be added only when you need to load balance between multiple servers, and IMO this decision is correct as sometimes it is good to avoid increasing the entropy if you can't manage it.
But apart from being a load balancer, Nginx is also widely used for:
Reverse proxy for multiple services [virtual hosts] (load balancing isn't mandatory)
Content caching (to avoid request hitting upstream servers everytime)
SSL termination
API Gateway (for security, rate limiting and routing)
Sometimes, also as a web server
so even if you aren't load-balancing you can get benefit from facilities provided by nginx like content caching, SSL termination, rate limiting, etc.
Later when need arises you can easily add more machines in the upstream to start load balancing.
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I am trying to find website with url https://example.com:8888 in iis, but iis bindings looks like this, this iis is on a vm instance hosted on azure,
when I do netstat I get this (copied picture from internet but I am getting exact same response for 8888),
Problem:
Wildcard certificate expired on "*.example.com" we renewed it on website in iis, it shows certificate valid for 443(https) and 80(http) but it shows certificate as expired for port 8888. I am unable to find binding for this website with port 8888 so that IT team could update it's certificate.
We stopped IIS server and website on 443 and 80 stoped serving however on port 8888 it kept showing certificate expired and didn't go down. However when we shutdown the server instance, it went down as well.
How to find this website so that we could update it's certificate ? thanks
You could check whether 8888 is listened by (PID 4)IIS by using command line:
netstat -ano
If the command line show that IIS is listening to 8888, then you could use this to find the binding& site with port 8888
appcmd list site
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We're trying to connect to a server but it's having the below error:
Sep 26 11:00:38 server name[8660]: conn=******** fd=*** closed (TLS negotiation failure)
I would like to know if the TLS version of my Unix server is compatible with the server we're connecting to.
Unix server is a Weblogic server.
Maybe using Qualys ssl server test would help to find out what goes on.
Actual TLS versions are 1.2 and brand new 1.3 - older versions should no longer be in use. So verify what is the version of your ssl library and which tls versions they support. Please also note that not only the version could be a problem, but also the configuration of the supported CipherSuite's.
Also a missing firewall configuration could be the reason - for the case that you use a firewall on the server.
Also the servers ssl port could be configured differently - normally its port 443 - but tomcat uses 8443 by default.
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I have a good experience with Unicorn configuration with conjunction of Nginx, it works really well after optimizations and tuning procedures. But now I have got a question what is the best way to spread the load across multiple machines with Unicorns.
The question is you have 3 machines (Nginx load balancer, 2 APP servers with Unicorns), how do you manage load balancing of Unicorns with serving static assets.
Do you now any drawbacks with connection to Unicorn over TCP (timeouts, connection lost), is there any other way to upstream socket connection over the network (maybe port forwarding over SSH)? Unicorn designed to be stateless, but how do you manage the edge cases?
I don't want to serve static from balancer node, so would it be ok to setup Nginx on each of APP server and setup dumb Nginx balancer in front of them?
P.S. My current configuration is well-tested and can be found on Github, but the setup with Nginx+Unicorn on the same machine that already became a bottleneck.
UPDATE: Development is rigidly depends on the specific server configuration. Bottlenecks are going to happen not just because of developer's decisions, but also with the environment where he run it. Stackoverlow is full with highly marked Q&A related to the hard-to-know details about specific configuration. Alex who answered below works with Github I'm really appreciate to have a reply by such qualified person!
Don't access the Unicorns over TCP/network.
Your setup seems just fine, you can simply add a load-balancer in front of the APP servers, but I would suggest Keepalived (LVS ftw) as load-balancer instead of Nginx.
You can have them balance connections to the APP servers running Nginx+Unicorns over sockets.
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I have server, bought from Linode. I decided to setup a mail server on it. I have about 20 domains will be pointing it.
I have a couple of questions;
This is the combination i will use; postfix + dovecot + squirrelmail. Are there better alternatives? I am completely open for recommadations because this is the first time i will setup a mail server.
Is it possible to use multiple domains with one mail server?
If it is possible to work with multiple domains, is it require a complicated and painful configuration?
Note: I can't use Google Apps because 40 EUR for per mail address is very expensive when you have a hundred mail address.
You have to have at least a basic understanding of how DNS works. It can be kind of a pain, but if you use one of the postfix plugins for management, should be fine. But yes, multi-domains on the same server is fine, it just has to know that it is representing those host hame records, and your DNS for your domains needs to be configured to have the MX records point at your server's IP.