There's no way around it. If you have a Boxer, you have a dog that is wired for action. The same genetic selection which provides them with their loveable temperaments and exceptional intelligence also gives them overflowing energy and the muscles to knock a human twice their size off his or her feet.
So if you have a Boxer, Boxer dog training is a must. And there are techniques specific to Boxer dog training which do not apply to other breeds.

Your Boxer dog training needs to employ methods which will keep you Boxer interested. Boxers are bred to be working dogs, and have a very strong drive to be productive. They want to be given something useful to do, and will be looking to you for cues that you appreciate the efforts they are expending.
And because Boxers were bred for use in the bull and bear-baiting sports, they have extremely high pain thresholds. Any Boxer dog training which involves harsh physical treatment will not only be wasted on them; it may encourage stubbornness and a complete refusal to co-operate.

So, before you embark on your Boxer dog training adventure, you need to make allowances for your Boxer's inbred personality quirks. Keeping them in mind, you should succeed at Boxer dog training.
Your Boxer puppy will come to you having learned from its mother and litter mates that every pack has rules. It will be watching to see who decides the rules in your house, and if no one seems to be the top
dog, it will happily assume the job. Boxer dog training, therefore, has to be consistent, with each rule made clear and each infraction immediately corrected. And the correction should always be the same.
It's important, therefore, that you do not confuse your dog. For example, if your Boxer, behaving as a good watchdog should, barks at the sound of footsteps on the porch, don't get agitated and demand that it stop. Your Boxer will read your agitation as a sign that there is cause for concern, and its protective instincts will be heightened even further. The barking will increase, and growling may ensue.

The Boxer is behaving the way it was bred to behave, and is taking its signals from you. So successful Boxer dog training requires understanding why your Boxer is reacting in a certain way, and thinking about how you can communicate what change is necessary.

If you stay calm when you hear the footsteps on the porch, and before opening the door fully, give your dog time to see who is there and to pick up from you that there is no cause for concern, the chances are good that it will understand the visitor is a friend, and retreat from ferocious defense to delighted wriggling welcome.

When you take on the job of Boxer dog training, you'll have a pupil who is bright, willing, and eager to please. It's up to you to keep things interesting and non-threatening, and if you do, you'll have a Boxer whose lifelong good manners and companionship will make you the envy of you local dog-owning set!