Skip to main content

What is a "proxy server"? How does it work?

Also called a "proxy" or "application level gateway," it is an application that breaks the connection
between sender and receiver. All input is forwarded out a different port, closing a straight path
between two networks and preventing a hacker from obtaining internal addresses and details of a
private network. Proxy servers are available for common Internet services; for example, an HTTP
proxy is used for Web access, and an SMTP proxy is used for e-mail. Proxies generally employ
network address translation (NAT), which presents one organization-wide IP address to the
Internet. It funnels all user requests to the Internet and fans responses back out to the appropriate
users. Proxies may also cache Web pages, so that the next request can be obtained locally. Proxies
are only one tool that can be used to build a firewall.
Labels:

Comments

Post a Comment

https://gengwg.blogspot.com/

Popular posts from this blog

CKA Simulator Kubernetes 1.22

  https://killer.sh Pre Setup Once you've gained access to your terminal it might be wise to spend ~1 minute to setup your environment. You could set these: alias k = kubectl                         # will already be pre-configured export do = "--dry-run=client -o yaml"     # k get pod x $do export now = "--force --grace-period 0"   # k delete pod x $now Vim To make vim use 2 spaces for a tab edit ~/.vimrc to contain: set tabstop=2 set expandtab set shiftwidth=2 More setup suggestions are in the tips section .     Question 1 | Contexts Task weight: 1%   You have access to multiple clusters from your main terminal through kubectl contexts. Write all those context names into /opt/course/1/contexts . Next write a command to display the current context into /opt/course/1/context_default_kubectl.sh , the command should use kubectl . Finally write a second command doing the same thing into ...
Post a Comment
Read more

OWASP Top 10 Threats and Mitigations Exam - Single Select

Last updated 4 Aug 11 Course Title: OWASP Top 10 Threats and Mitigation Exam Questions - Single Select 1) Which of the following consequences is most likely to occur due to an injection attack? Spoofing Cross-site request forgery Denial of service   Correct Insecure direct object references 2) Your application is created using a language that does not support a clear distinction between code and data. Which vulnerability is most likely to occur in your application? Injection   Correct Insecure direct object references Failure to restrict URL access Insufficient transport layer protection 3) Which of the following scenarios is most likely to cause an injection attack? Unvalidated input is embedded in an instruction stream.   Correct Unvalidated input can be distinguished from valid instructions. A Web application does not validate a client’s access to a resource. A Web action performs an operation on behalf of the user without checkin...
2 comments
Read more