What Is a Proxy Server?
a Proxy Server — an intermediary that makes requests on your behalf — clients talk to the proxy, the proxy talks to the internet, enabling filtering, caching and monitoring.
How it works
A forward proxy sits in front of users: it can cache popular content, block forbidden sites, log activity and hide internal client addresses. A reverse proxy sits in front of servers, receiving public requests and passing them to backends — providing load distribution, TLS termination and shielding.
Why it matters
Proxies appear in enterprise security designs (content filtering, inspection) and in CyberOps log analysis — proxy logs are a goldmine for spotting malware callbacks and data exfiltration. Know forward vs reverse for interviews.
Frequently asked questions
What does a proxy server do?
It relays requests between clients and servers, adding control: caching, filtering, logging and address hiding.
What is the difference between a forward and reverse proxy?
Forward proxies act for clients going out; reverse proxies act for servers receiving traffic in (load balancing, TLS, protection).
Is a VPN the same as a proxy?
No — a VPN encrypts all traffic at the network level; a proxy typically relays specific applications' traffic and may not encrypt at all.
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