When I say,
1000 domains are hosted on the same server.
Does it means that 1000 domains are hosted on the same IP address?
Yes. You configure the server software to correlate the host name to the right service files. This applies to FTP/WWW, etc.
A server can host either virtually by use of the same IP address with different host headers (example.com, sample.com, sub.sample.com), through the use of multiple IPs bound to the server, or a combination of both.
So to answer your question, no, having 1000 domains hosted on the same IP address doesn't mean that they have the same IP address. However, it is possible given the configuration of the sites.
Normally, yes.
There is nothing stopping you from installing another NIC and having another IP address on the machine, but typically, 1000 domains hosted on the same server will be accessible using the same IP address.
Web servers use the host header to determine which site to load when many sites are configured to use the same IP address.
It's possible, with name based virtual hosting, a feature introduced in HTTP 1.1. It causes some problems with really old (corporate) proxies that pretend to only speak HTTP 1.0 and there are SSL related issues, so in general it's not the optimum solution.
Related
As the title says, I have been tasked to do Load and Performance Testing on a Client's Server, I have followed all steps, made additional IPs and added it to the system, and entered the same IPs in Jmeter using CSV dataset, and Debug Postproccessor shows that the request is being sent with the correct IPs. I am doing this over wifi, so hopefully that isn't the issue.
Any help is appreciated.
System config
OS: Windows 10 64 bit
Ram: 16gb
Jmeter Version 5.4.3
It may easily happen if you're behind NAT and the server is in the Internet, in that case no matter what is your local IP address(es), the server will "see" only the address of your NAT gateway, you can check yourself using websites like https://www.whatismyip.com/
The trick with local IP addresses (or aliases) will succeed only in case of local intranet, when it comes to Internet - you will need to have as many global static IP addresses as many users you're trying to simulate.
One of the possible solutions is kicking off virtual machines in AWS or Azure or similar service or asking your ISP to provide you a pool of IP addresses you could use (normally you will need to pay for this) and go for distributed testing so each JMeter slave would have its own IP address (or several) to bind.
I am configuring a High Availability load balancing based on HAProxy and Keepalived.
Everywhere I do research they talk about Virtual IP like something that fell off the sky – I mean, with little to none explanation about how to get one.
By now, I have arbitrary defined a virtual ip address in the keepalived.conf like this:
virtual_ipaddress {
10.0.0.100
}
With both Servers running keepalived, I do ip address command in the MASTER machine and it shows inet 10.0.0.100/32 scope global eth0 next to the Public IP, which I believe is correct.
When I do service keepalived stop in the MASTER machine and run ip address in the BACKUP machine, BACKUP shows inet 10.0.0.100/32 scope global eth0, IP which effectively disappeared from MASTER.
The above mentioned behavior indicates me that the config is all right.
Now, how can I publish that Virtual IP? Do I need to buy one? If my server provider (Contabo) doesn't offer the Virtual IP service, where to buy it?
My goal is to have my Front-End API requests aiming at the Virtual IP.
Thanks very much in advance for any guidance!
Server A and server B addresses are either manually configured when setting up the servers, or obtained via dhcp.
There is nothing magical about the virtual ip, other than it is not obtained in the same way.
If it is your own network, you can just pick one in the same range as for the two servers, and make sure that no new servers will use it.
Since you are talking about a provider, you will need to ask them if they provide floating ip addresses.
10.x.x.x is a private ip, so you can not publish that to the internet, but you could use it for example to fail over internal services.
I am creating an android client app connected to a Java server using sockets. At the moment I am working both on my pc. How can I upload my Java server to an online server so I can set my app to friends and test it?
I used OpenShift but could figure our how and if I can use it for what I want.
Also I looked at Amazon ec2, but they need credit card information, something that I would prefer not sharing for this.
Is there any way I can do this for free?
Thanks
Make sure you have a computer able to connect to the internet, and that can run 24/7. Then run your server on that computer, assume you run it on port 8080. Make sure that your host computer's IP address is it to static, otherwise DHCP will give it a different IP every time it connects to the router.
To allow your friends to connect, unless if they're on the same LAN as your host, you will need to port forward port 80 -> ComputerIP:8080 on your router. Once that's done, you will need to retrieve your router's global IPv4 address from it's configuration page and then send that to your friends.
If they're on the same LAN as your host, then you can just give them the IP address of your host computer.
If you port forwarded your server and you would like to get a host name, like stackoverflow.com, you're going to need to buy that from whoever owns the host name you would like to use. I don't know many details about how to update the DNS servers though.
If your server is local and you would like a host name, then just go onto your router configurations page and tell it to automatically assign each computer the default gateway as the primary DNS and then add a mapping in the router's DNS settings to map the host name to your computer's local IPv4 address. Note that not all routers support this feature.
Edit: You'll also need a good bandwidth to support multiple simultaneous connections.
I have been search for a host that has static/fixed ip address. Right now i use mediatemple's grid server and because it is a shared environment the ip address is dynamic and changes randomly.
My issue is that i have a script on my sever that fetches data from an ftp site. To access the data via ftp, i have to authenticate using an ip address, username and password. Because the ip address is ever changing, i cannot access the data.
One alternative was asking the data company if they would accept a range of ip address or a wildcard but they will not. they will only approve one ip address for download.
The other option was to purchase a self managed server. I do not want to manage my own server nor do i have the expertise to do so. So I need a solution like a shared environment (low cost) with a cpanel but one that has fixed ip address.
Any suggestions would be much appreciated.
You should look for "managed server" or "VPS" solutions.
Which host you choose is up to you. Many hosts offer such solutions, and a smaller host might fit your budget better than a "big name" hosting company.
This is really surprising ... usually in a shared hosting account where your site is hosted on a shared IP, the shared IP address is always fixed it rarely changes. I think you're right now on CDN hosting, so your data delivery IP address varies according to your VISITOR location.
I am hosting my various sites like thewebhostingdir.com and etc at http://www.accuwebhosting.com/ ... on shared hosting and their IP address is fixed since the hosting setup.
I suggest you to change your hosting provider. You don't need VPS at this moment.
I found a solution. Godaddy vps virtual server starting at only $29.
I've received a few messages from users of my site that they can not access it from home.
They can access the server from the IP, but not by the domain name.
I think it has something to do with the way my DNS is configured. I setup my own DNS server about 4 years ago on my server, which I probably should not have done, and I'm not sure if everything is configured correctly. There are plenty of people who can access the site without any problems, but some users get 'server can not be found'.
Server Details: Windows 2003 co-located server at a small local hosting company.
Are there good tools or sites that can test and provide configuration recommendations? How do I test this problem when it works fine for me and so many other users? What type of questions should I ask users that can't access the site?
Can I provide / point to another DNS server that can be used if the first server isn't working?
Thanks!
Nevertheless here some pointers:
Questions that you can ask the users:
Run the following command: nslookup test.company.com. The result should be the IP they could access by IP. If it's a wrong IP or no IP, then this hostname A / CNAME record isn't propagated correctly to the outside world.
It could be a ipv4/v6 problem. Maybe the DNS resolves to a ipv6 IP by AAAA record and your ISP (or any provider inbetween) doesn't support ipv6 correctly yet. Under windows, you can ping -6 or ping -4 to see if it resolves to anything at all.
Possible workaround:
Tell your users to hardcode the IP of your server into their HOSTS file...
DNS problems are usually lying at the companies infrastructure though (e.g. not propagating the DNS notifications correctly, wrong DNS servers at your registrar, wrong DNS configuration on your DNS server...)
There's an excellent on-line resource to verify your DNS settings: intoDNS.com
If you think the problem is in your DNS server and you don't need it this way anyway, you can just turn your DNS to any DNS hosting - see my biased list. Setup your DNS records from scratch with any DNS provider and tell your domain registrar to use that provider nameservers. Often registrars themselves provide DNS servers as well.
As for questions to ask users, Khoi explained everything.