Block unwanted visitors using their IP address on your Joomla site?
Sometimes you need to block a certain IP address, a group of addresses or certain hosts from accessing your Joomla website. Reasons may include:
- It's a hacking attempt coming from that IP
- Someone is scraping content from your website
- A brute-force attack (in most cases a DoS - Denial of Service - attack is originated from that IP (there are too many requests coming from a particular IP
- Someone continuously spamming your website
- Some content from your site (images, media files) are hotlinked from your website.
The solution is simple, but is advised to apply first other tools to stop these bad guys - overuse of this tip can slow down your site considerably, use it ony if you don't have anything else - or you are in hurry to stop an ongoing attack.
This tip is only for Joomla 1.0! For newer versions the handling of bandwidth is more cleverly solved, so read on only if you still use Joomla 1.0.
Can't login after moving to new server
If you search on Google for the term "joomla can't login after moving to new server" - or something similar, you will get more, than 1 million hits for most of the combinations.
So, you aren't alone. And there are plenty of suggestions, on what might gone wrong and how you might find that, and there are verious fixes. But what if you moved the site to another domain? From development server to it's final place? This is a subject wich is rarely touched by those advices.
Customize your Browser Caching for Faster Performance
In the race to the top of Search Engine result pages - ultimately higher SERP (Search Engine Ranking Points) the site speed is an important factor. There are lots of tricks to increase a Joomla site's speed, here is one wich does not need additional code to be installed and executed, but yet is powerful an let you fine-tune your site's performance.
Denial of Service Attacks (DOS, DDOS)
A denial of service attack takes place when a hacker overloads a system with large or repeated requests for a service.
Give a boost to your Joomla site
One of the problems any webmaster is facing that the site may be not fast enough to meet his expectations. How you can squeeze up that last drop of extra speed from your site? We published lots of tips on this theme, but let's reorganize and update them with possibilities of the latest Joomla implementation (1.5.10 as the original article was written, 1.7.3 on last update I wrote this). I try to present them in decreasing order of importance/effectiveness, but the actual order reflects mostly my personal experience - which may be different from yours - and not some rigorously measured facts. But, believe me, I have a good nose for this. Some of the tips are easy to implement - and some may need advanced knowledge. But I mixed them up there to let you know what you may need to check - or what you may need ask from your programmer/web developer.
Give a boost to your site's search speed
When one needs something, usually want it fast' and with large, complex Joomla sites that may be a problem. Sometimes the search takes... okay, not forever, but long enough to think about how you can give it some extra speed. Here are some tips and tricks to accelerate Joomla search speed:
- JCH optimize: load Joomla fast
- Joomla 4.0 | A new world of possibilities.
Joomla Site Statistics
Are you a good webmaster willing to see how your site are performing? Or you're a web developer in need to show to your client how their brand new/re-branded/tweaked/SEO/SEM mastered site is performing? If the answer is yes, you may already know, that web statistics is a powerful resource. And there are a lot of Joomla packages to help you. So, why you are reading this, instead of grabbing one and using it?
- Joomla slow? Speed it up in 5 minutes
Leverage browser caching
One of the most easy ways to make your Joomla website faster is to leverage Joomla browser caching. This is one of the high priority tasks recommended by Google to make your website load faster.
Stop image hotlinking
When other people link to your images directly this can put an unwanted, additional strain on your servers - it is not just an annoying, unfair practice to use your intellectual property.
That practice is called image hotlinking and you can disable it by adding some code to your .htaccessfile.
Turn caching on!
To improve your Joomla website's performance, just turn on "caching" on the "Cache" tab from Joomla's Global Configuration. When caching is turned on, Joomla creates a static file or "cache" of your website data on the disk. When the static file is found, the system retrieves the data from the disk rather than from the database. This improves performance because it saves system resources by not making redundant SQL calls to the database. And it will also speed up the display time of the pages.
You can set cache refresh rate in seconds. If you don't constantly update your contents, you might want to set it longer. And to further improve it, go to all your modules configurationand select "yes" to cache option (not available in all modules).
When searchengine robots are hammering your site...
SEO is good. SEO is great. Making search-engine spiders visiting your site is even better! Or not??? Recently one of my client has complained, that he was almost banned from one host, because the search-engine bots where "hammering" - read overloading - the server. Ouch...