Because incoming traffic cost , my care is about ddos and iptable.
Whats the level of both applications iptables and load balancer,
is iptable is proceeded before load balancer ?!
By the way is there any anti ddos capability on google plateform?
I just ran into pricing calculator, 3TO incomming traffic with a load balancer cost 56 dols..
GCP ingress firewall is after loadbalancer
GCP load balancing solution has a DDoS mitigation built-in lowering the attack surface:
network load balancing has port filtering. Any port that is not loadbalanced is dropped by GCP highly scaling frontend infrastructure
HTTP/HTTPS loadbalancing can absorb and protect from IP spoofing and large SYN flood attacks.
it has also fair-share allocation built-in
You can edit a firewall , see this section https://cloud.google.com/compute/docs/networking#firewalls
Related
We use apache httpd load balancer for our project.
We were looking at Google Load balancer and may be shift to it.
But i dont find any comparison of both as in pro/con of one over another, so that we can decide on what suits as best.
Can we get a list of pro/con?
If scalability and performance is critical to you, definitely choose GCE load balancer. The traditional model of load balancing is basically "proxy + backends", in which the proxy quickly becomes the bottleneck. This is not the case for GCE load balancer, which has no proxy at all, the load balancing is implemented by the underlying infrastructure.
But GCE load balancer is not free, see pricing here https://cloud.google.com/compute/pricing#lb.
I am new to Google compute engine and I am try to setup network load balancing having 2 VMs for serving web pages.
For ex, I have 2 VMs - app1 and app2 - both having apache server and serves simple web page.
Both VMs are running with Red Hat Enterprise Linux Server release 7.0 (Maipo)
I am able to access both web pages through the IP in browser.
I created network load balancing setup and both apps are showing in green in target pool which means load balancer is able to connect to both VMs.
But, when I hit the IP of load balancer, it is rendering page from only one server. If I manually stop the server in the VM, load balancer IP redirects to other app. I believe load balancer is able to identify health of both VMs and able to redirect.
But it is not balancing the traffic. Can anyone help me to solve this issue?
I think that the network load balancer doesn't forward the traffic on a round-robin basis. I was able to test it with the load balancer setup that I have. As per the documentation:
By default, to distribute traffic to instances, Google Compute Engine picks an instance based on a hash of the source IP and port and the destination IP and port.
HTTP/S load balancing will proxy requests in a round-robin fashion. https://cloud.google.com/compute/docs/load-balancing/http/
I need to know the difference between a load balancer and load balancing.
Load balancing is the functionality provided by a Load balancer :).
In software architecture, a load balancer proxies client requests to a pool of application server, using an algorithm, with the objective of balancing the load of client requests evenly across the pool
Load balancing refers to efficiently distributing incoming network traffic across a group of backend servers, also known as a server farm or server pool.
A load balancer acts as the “traffic cop” sitting in front of your servers and routing client requests across all servers capable of fulfilling those requests in a manner that maximizes speed and capacity utilization and ensures that no one server is overworked, which could degrade performance. If a single server goes down, the load balancer redirects traffic to the remaining online servers. When a new server is added to the server group, the load balancer automatically starts to send requests to it.
refer - https://www.nginx.com/resources/glossary/load-balancing/
Load Balancing helps spread incoming request traffic across cluster of servers. If a server is not availble to take a request, load balancer passes this request to another server.
Load Balancer in turn are the ones which achieve above, they could come in between :-
User - webserver
Webserver - internal application servers
Internal servers - database servers
Application servers - cache servers
Different types of Load Balancers:
Smart Client - Adding load balance achievability by It is a client which takes a pool of service hosts and balances load across them, detects downed hosts and avoids sending requests their way.
Hardware Load Balancer - Buy your own dedicated high performance server eg. Citrix NetScaler.
Software Load Balancer - Buy a software load balancer to overcome all the pain of building your own smart client or if you not ready spending on dedicated server. Cost effective than above two is buying a software load balancer eg. VmWare, HAProxy etc
As per my knowledge both are same but you can say that the load balancer is the device used for balancing the traffic as per the availability of the server and load balancing is nothing but theoretical explanation for how to achieve this.
Please correct me if I'm wrong!
Just wondering if it is a standard practice to use AWS Load Balancer to handle the HTTPS and forward it to the application as HTTP so none of the app instances have to worry about ssl certificates.
Yes, that's a common practice. One of the most important optimizations you could do for a website is to perform the SSL offloading geographically as close as possible to the client.
The SSL handshake consists in a couple of exchanges between the client and the server in order to establish the SSL session. And by having the SSL offloading as close as possible to the user you are reducing the network latency. The load balancer could then dispatch the request to your webfarm which could be situated anywhere in the world.
I am getting into load balancing and how security with SSL certificates can be integrated with a load balancer.
Let's say that I want to expose several copies of the same RESTful web service over Amazon Elastic Load Balancer. All should be fine and smooth up until now. However, security has not yet been taken into consideration.
Now, let's say that we want the communication to be secured with an SSL certificate, so we go ahead and buy a certificate. We will have several IP addresses which are all exposing the same RESTful server with the load balancer. These IP addresses will all get mapped to the same domain name (https://thedomain.com). This way, the clients always connect to the same domain. It is then up to the load balancer to redirect to the web service which is getting the least traffic.
The main question is, is it possible for such an architecture with a single SSL certificate? As if this is so, it would be possible to extend the amount of services dynamically without having to change the security.
It is then up to the load balancer to redirect to the web service which is getting the least traffic.
AFAIK, the ELB supports only RoundRobin and Stick sessions. So what you said above will not happen.
is it possible for such an architecture with a single SSL certificate?
You can install the SSL certificate on the ELB and let it do the SSL termination. The traffic between ELB and your Web Nodes will be un-encrypted then. You should explore AWS VPC where you can have a public facing ELB and your Web Nodes will be within Private subnet.
Also, ELB supports TCP load balancing. In this case, you install the Certificate on the Web Nodes and ELB will accept traffic on port 443 from internet and will simply forward it to port 443 on web nodes wherein web nodes have to do SSL encryption/decryption.
Hope this helps.