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What is a proxy?


The proxy server is also known as proxy or application level gateway. It is a computer that works as a gateway between a client computer and the Internet. Proxy servers deliver increased security and performance. Sometimes they monitor employees’ use of Internet’s outside resources.


A proxy server works by taking over connections between receiver and sender. All incoming data comes in through one port and it is forwarded to the rest of the network through another port. Proxy servers make it more difficult for hackers to obtain details and internal addresses of a private network, by blocking direct access in the midst of two networks.


Some proxy servers are a group of server of applications that block common Internet services. For instance, an HTTP proxy takes over web access and a SMTP proxy takes over email. A proxy server uses a NAS (network addressing scheme) to supply one organization-wide Internet Protocol (IP) address to the Internet. All user requests are funnelled by the server on the Internet and responses are returned to the appropriate users. This mechanism can not only restrict access from outside but also prevents inside users from connecting to specific Internet resources (for instance certain web sites). A proxy server may also be one of the firewall components.


Proxies can also cache web pages. Every time an internal user requests an URL from outside, a temporary copy is stocked locally. The next time an internal user makes a request for the same URL, the proxy can supply the local copy instead of reinstating the original across the network what improves performance.


Note: Do not mix up a proxy server with a Network Address Translation (NAT) device. A proxy server receives traffic, connects and responds to the Internet, acting in behalf of the client computer, when a NAT device transparently switches the traffic origination address coming through it before letting it to pass to the Internet.


For those who understand the Open System Interconnection (OSI) mode of networking, the technical difference between a NAT and a proxy is that a NAT works on the layer 3 (network layer) whereas a proxy server works on the layer 4 (transport layer).


Pros of proxy servers:

>You can connect to any website the proxy can connect to, as long as you can connect to it.

>Your identity is not revealed, as long as you don’t leave information that traces back to you.

>Proxies are banal to set up.


Cons of proxy servers:

>Proxies can be easily blocked by network administrators.

>A compromised proxy server may create a greater threat than no proxy at all.

>The proxy server can see your identity, it is not hidden.

IP addressPortCountrySpeedTypeAnonymityLast check flag
Indonesia, Surabaya
3220 ms
HTTPHigh1m 14s ago flag
1460 ms
HTTPLow1m 42s ago flag
1320 ms
HTTPLow1m 42s ago flag
2300 ms
HTTPLow3m 38s ago flag
5100 ms
HTTPLow3m 38s ago flag
1500 ms
SOCKS4High5m 47s ago flag
5100 ms
HTTPLow7m 40s ago flag
1620 ms
HTTPLow7m 46s ago flag
1280 ms
HTTPLow7m 46s ago flag
1080 ms
HTTPNo7m 47s ago
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What is the difference between proxy and VPN (Virtual Private Network)


What a VPN logically does is turn your Internet connection into a huge Ethernet cable. When the client is logged on to a VPN , the effect is comparable as though you took your computer to the building where the VPN server is based. VPNs usually use encryption that intermediate systems between the client and VPN provider such as a malicious wireless network sniffer or ISP can’t eavesdrop your traffic.


Think of a proxy as a filter. When all network traffic of a certain type, for instance Web(HTTP) traffic, passes through a proxy, that proxy can manage that traffic on the way in and out. This has numerous uses ranging from anonymizing, malware protection, censorship, ad-filtering, etc.


At first a proxy server modifies your traffic and only then it gets to the target. A VPN just folds it up in encryption during transferring. Certainly for a VPN, the other end must be VPN cooperate and aware. This isn’t necessary for a proxy.


Technically, the client can have proxy servers that just encrypt traffic or the client can have a VPN that works like a proxy server and modifies the traffic. Both VPN and proxy forward traffic in behalf of a client. Proxy generally works on specific types of application traffic. For instance there are DNS proxies, HTTP proxies, HTTPS proxies, etc. Additionally there are SOCK5 proxies that proxy everything. Several  VPN software may also be configured to act as a VPA (Virtual Network Adapter), so there’s a possibility to move traffic through it that does not have to be VPN aware or proxy.


>Any software that uses the Internet may use a VPN.

>Proxy servers are less expensive and oft easier to set up for great number of users, but they need specific software support at the proxy user’s end to make the queries to the proxy server. 

> A single proxy server can service thousands of users.

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