ELB is Amazon's managed Load Balancer service, used in conjunction with its EC2 virtual machine cloud hosting service.

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Elastic Load Balancer connection draining causes a blank page for some web sessions

I'm running 3 EC2 instances behind an ELB with connection draining enabled (set to 300ms). When I remove an instance from it, I can see fewer and fewer web requests in the server log until eventually ...
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27 views

Disabling SSLv3 in ELB on Amzon linux ec2

Hi I have Elastic Load Balancer on which I've deployed my ssl certificates and when i check on the web it say site is vulnerable because of SSLv3 is enabled on the site. So my question is What ...
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35 views

CloudFormation with an ELB and its public dns

I'm using Cloudformation to build a load balanced stack. My concern is that each time the stack is recreated, the ELB public url will change, which will require a change in the website's route 53 ...
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1answer
72 views

Whitelist Elastic Load Balancer based on IP [closed]

I'm serving HTTP traffic on port 80 through an ELB. Since a short time, a growing amount of clients are asking me what our IP addresses are (to harvest data). Apparently they can't whitelist the DNS ...
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20 views

How to target www.example.com\ in RedirectMatch rule?

Particular requests are coming into my site formed as: www.example.com\ The trailing backslash is causing a 503 response to come from the server, which is behind an ELB, ideally I'd send these back ...
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69 views

haproxy proxy protocol x-forwarded-for

I'm using haproxy instances behind AWS ELB. For HTTP Rest, i works like a charm. Now i want to dispatch websockets and have to switch my AWS ELB to TCP mode. I Want to get realip from by backend ...
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1answer
68 views

ELB - High latency when enabling cross-zone balancing

I'm working on improve our infrastructure reliability in AWS and one of my tasks is enabling cross-zone balancing on our ELBs. Our ELBs receives around 20K request by second on rush hours as well as ...
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1answer
58 views

No Data returned from IIS 8 behind Amazon ELB

We have a few Windows 2012 boxes running IIS 8 behind an AWS ELB. On a recent reboot, we lost the ability to hit those servers, via web browser, when connecting through the ELB. If we address the ...
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1answer
48 views

What's the difference between a private and public subnet?

For the purposes of learning, I'm trying to setup a public/private VPC in AWS without using the wizard, and I'm trying to determine how AWS decides if a subnet is private/public. For argument sake, ...
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1answer
60 views

VPC public subnet internet access with ELB hooked up

I am attempting to set up a web server (nginx) that needs access to the internet while also being hooked up to an ELB but I am having trouble getting this solution working. Details: 3 public ...
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33 views

Incremental Subdomain Brute forcing?

Currently looking after a small varnish/nginx webserver group sitting behind an AWS ELB. Monitoring of the primary domain recently picked up a huge number of hits to non-existent sub-domain ...
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1answer
93 views

AWS Elastic Load Balancer : white list only my IP

My objective: To make my AWS Elastic Load Balancer hittable by only traffic from my ip. What I have tried: created a security group in EC2 security groups set an inbound rule that allows all ...
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68 views

Nginx : AWS Route 53 : ELB : naked redirect

Setup I have two rails app instances running in Opsworks Layer. I am using Route 53 and an ELB to route traffic to my Layer. Objective To redirect naked domain traffic to my www domain. chicken.com ...
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186 views

using nodejs https module with ssl certificate proxy with nginx without adding ssl certificate in nginx

I am using nodejs https module with nginx proxy. I have multiple ssl certificate and I want to run all https sites using node without adding all certificates in nginx ssl server. Is any way to proxy ...
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1answer
71 views

Trouble installing SSL on AWS elb

I'm trying to set up a Gandi SSL certificate but can't get it right from firefox point of view. I installed it on my load balancer (ELB) by converting my certificated to the pem format using the ...
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3answers
155 views

Block traffic behind AWS ELB

My web servers are behind ELB, I want to block traffic from some specific user agent which is a DDOS attack. Apache always see ip address of ELB as an end user so I tried below attempts: Blocking IP ...
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1answer
60 views

Elastic Load Balancer bandwith vs EC2 [duplicate]

How does pricing with AWS works. By exemple: 1024 Go of Data Transfer Out in their calculator (http://calculator.s3.amazonaws.com/index.html) cost about 120$. If you remove this 1024Go and move it ...
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2answers
561 views

Can't get Network Solutions Certificate chain working with EC2 Elastic Load Balancer

I have a certificate file provided to me which is a wildcard domain name. It comes as both a key and a crt file. No other files were provided. I'm having trouble getting it to work correctly with ...
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1answer
38 views

Determine EC2 instance's load balancer automatically

Is there a way to automatically determine what the load balancer, if any, of a given EC2 instance is? I.e., have it ask "who is my LB and what is its service IP?". I was thinking of the instance ...
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120 views

How to map multiple AWS LoadBalancer ports to a single instance port?

I have setup like this -- Two ports on my load balancer map to a single port on my instance (the instance checks the HTTP header and issues a HTTP redirect to the HTTPS site for any non HTTPS ...
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1answer
195 views

ELB and SSLInsecureRenegotiation

I currently have SSLInsecureRenegotiation set to off on my Apache 2.4 Amazon Linux server, but I am still failing over at SSLLabs (Secure Client-Initiated Renegotiation SUPPORTED). Do you know how ...
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1answer
70 views

ELB and Backend Authentication with Apache 2.4

I tried looking at AWS guides, and other things but can't seem to figure this one out. When using ELB there is a backend authentication option. I want to enable it, but I am not sure what ...
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1answer
383 views

Where to start? Multiple Websites, same IP and port, same SSL, on Apache 2.4, Ubuntu, EC2, behind AWS ELB?

Current Situation: My company runs a number of individual EC2 instances hosting unique websites using multiple subdomains off of a common top-level domain. (abc.foo.com, and def.foo.com, for example). ...
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76 views

Allowing multiple IPs behind ELB in Apache configuration

I have multiple application servers running as EC2 instances. Only certain bare-metal servers running elsewhere are allowed to contact them and their IPs whitelisted explicitly in the httpd.conf @the ...
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1answer
216 views

Internal DNS doesn't work with CNAME

I have an internal DNS setup setup in my AWS VPC network, I just created an internal load balancer and added a CNAME record to this load balancer, but it's not working. DNS CNAME entry: db1 IN ...
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48 views

LogFormat for AWS Elastic Load Balancer

is there anyone able to stat AWS ELB access logto Awstats? I have played a little bit to format the log but without any luck. if someone did can share how that can be achived. thanks .
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97 views

ELB --> Apache (with mod_security) --> NodeJS 408 timeout issue

I have an ELB sitting in front of a number of API servers that have Apache with mod_security installed, which in turn forward stuff to a nodejs. Sometimes I'm seeing dropped connections like the one ...
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1answer
116 views

How to manually drain ELB connections for a EC2 instance?

I have connection draining enabled for a ELB. According to the documentation at http://docs.aws.amazon.com/ElasticLoadBalancing/latest/DeveloperGuide/TerminologyandKeyConcepts.html#conn-drain, a ...
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131 views

Allow ELB healthcheck against nginx but block proxied connections

I have a daemon process that polls a page to monitor system status, as long as everything is happy magic_check.html will exist. As soon as something goes down the file is deleted. I have the AWS ELB ...
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1answer
263 views

SSL termination point for AWS EC2? ELB or NginX or..?

I have a number of stand alone java web applications that currently run on different ports and URLS. I would like to expose all these apps behind a single port(443) and map the different public URLs ...
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1answer
262 views

Is AWS ELB a viable replacement of RDGW

tl;dr Is Amazon Web Services Elastic Load Balancer a viable replacement for Remote Desktop Gateway? short enough; did read My client currently uses a remote desktop gateway with roughly 10 remote ...
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1answer
124 views

Solution for PHP / MySQL website loading fast in multiple regions [closed]

I host am ExpressionEngine based website on a single Amazon EC2 instance in the US East (Virginia) region. I use Ubuntu. The website allows members to post their content, and displays it for other ...
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1answer
41 views

Setup SaaS test environment with EC2 and Nginx

I need help to setup a test environment under Nginx that is able to target a specific EC2 instance. I am using Amazon's Elastic Load Balancer and auto scaling to manage my EC2 production instances. ...
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2answers
200 views

Stagger automatic windows updates for ec2 instances

I have several Windows ec2 instances that are controlled by an ELB (Elastic Load Balancer). These instances are scheduled to install any new windows updates once per day during non-peak hours. ...
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115 views

AWS ELB Monitoring - instance state “Unknown”

We have a nagios script (python) which monitors our AWS ELBs and alerts if there are unhealthy instances. It has been working fine for some months. Over the last week or so, we've started receiving ...
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1answer
112 views

How to add HTTPS to Elastic Load Balancer?

I'm using boto to create an Apache http server that "hides" behind an AWS Elastic Load Balancer (ELB). However, the ELB DNS address is functional only when I specify port 80 (http) in its security ...
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2answers
176 views

AWStats LogFormat for AWS Elastic Load Balancer

Hoping someone can point out what is wrong with the LogFormat I'm attempting to use with the access logs generated by Amazon ELB. Multi-line for ServerFault readability: %time5 %elb %host %host_port ...
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1answer
226 views

OpsWorks Auto Healing instances that fail ELB (load balancer) test

From the AWS documentation I understand that some kind of unresponsiveness from an instance will cause it to be terminated. There is nothing in the docs that would suggest that ELB health checks can ...
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1answer
563 views

Why is my instance failing ELB health checks when adding it to the load balancer via Ansible?

I am trying to add an EC2 instance to an Elasitic Load Balancer using an Ansible playbook, with the ec2_elb module. This is the task that should do this: - name: "Add host to load balancer {{ ...
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1answer
153 views

Apache config for heartbeat and proxy pass through to ELB

I am running Apache 2.2.15 on Linux in AWS using ELBs. My goal is to provide two functions: 1) Heartbeat page for my ELB to check to see if Apache is running (/healthcheck.html) 2) For all other ...
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1answer
122 views

Elastic Load Balancer and Varnish on Each Node

We want to install Varnish on our nodes that are handled by an Auto-Scaling Group and ELB. These servers currently grow and contract based on load from 2-10 nodes. We do not want to have another ...
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2answers
1k views

Redirect all http requests behind Amazon ELB to https without using if

Currently I have an ELB serving both http://www.example.org and https://www.example.org. I would like to set it up so any request pointing to http://www.example.org is redirect to ...
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1answer
271 views

AWS ELB with SSL to non SSL backend and jenkins - tomcat configuration

I'm setting up Jenkins with Tomcat on AWS behind an ELB. I want ELB to terminate SSL connections and make a non-SSL connections to the backend jenkins on 8080. My connection looks like -- Incoming ...
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2answers
145 views

Customize log entry for AWS ELB for real user IP

I would like to change the logging format for AWS ELB, in order to log the real user IP. My current server setup contains multiple layers of proxies as followed: CloudFlare -> AWS ELB -> Nginx (EC2) ...
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1answer
47 views

Amazon ELB in Australia does not work reliably

I have a user in Australia who cannot access our site. Our site sits behind an AWS ELB which seems to work fine. While troubleshooting his machine remotely I can see that ELB issues two IP addresses ...
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2answers
179 views

How to set inbound rule for Amazon ELB based on path

I have a set of EC2 instances and a load balancer in front of them. I set up a security group for the ELB and set an inbound rule to allow HTTP traffic from anybody. However I would like to restrict ...
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76 views

How can I use ELB load balancing metrics in autoscaling group policy?

How do I configure an auto-scaling policy to work off the latency cloud watch metric of an associated ELB. I have looked at all the example cloud formation scripts and they only work upon metrics from ...
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172 views

Load balanced EC2 instances for high performance hosting?

I have a fairly hefty Dell machine with dual quad-core cpus and 32GB memory. On that machine I host a pretty busy forum, but the one machine does everything; web, cache, db, sphinx, etc. I also have ...
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62 views

In Route53, balance traffic between ELB and other IP v4 addresses

Using Route53, is there a way to round-robin to a combination of ELB's and IP v4 addresses? I have three load balancers, two are external to AWS and one is an AWS ELB. I want all three load balancers ...
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1answer
285 views

How do I troubleshoot latency issues with elastic load balancer (ELB) in Amazon AWS?

We have a web app and API hosted at Amazon AWS, with three environments - development (dev), testing/staging (uat), and live. Each environment has a load balancer, two EC2 instances and an RDS ...