web security
web security thoughts for 12.31.1969
- Offshore hosts are frequently used by spammers for mail services and website hosting, since they are essentially beyond the reach of U.
- Can-spam is supposed to limit spam by making it a federal crime, but in practice it permits opt-out spamming (provided certain conditions are met), attempts to invalidate some tougher anti-spam laws already in effect in individual states, and does not effectively deal with the problem of off-shore spamming and spam website hosting.
- A computer program that can visit websites and usenet news groups in the same manner that a human reader would, and can thereby collect what look like valid e-mail addresses for inclusion in a spam mailing list, is called a spambot.
- You can sometimes track spammers to particular IP addresses that they use (for sending mail or for maintaining websites).
- An address harvester is a program that searches web pages and message posts looking for valid email addresses to be used for spam purposes.
- Open proxies (a third-party computer that has been configured to serve spammers by untraceably relaying their mail, hosting or guarding their websites, or performing other tasks, often known as "bots" or "zombies") are usually individual home or business pcs (typically running some version of microsoft windows) that have not been properly secured against malware attack, and that are connected to the internet full-time via some sort of broadband connection (so they're always available to the spammer).
- Typically dns queries are done invisibly to the end-user by his applications (web browsers, mail programs, etc.
- Beacon urls usually take the form of invisible images or undefined anchors that have clear or encrypted data appended to them; the data will show up in the spammer's web server logs or private databases when the link is fetched.
- Spammers usually build software spiders and unleash them through the internet to crawl through websites looking for "mailto:" html tags which are used when linking email addresses together.
- At any company that isn't an isp or web hosting company, the system administrator (one a system administrator) is usually in charge of the company mail server, and responsible for preventing spam from reaching the company's employees.
web security
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