Pratica di Shadowing: Proxy vs Reverse Proxy (Real-world Examples) - Impara a parlare inglese con i video
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Why is Nginet called a reverse proxy?
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What is a proxy anyways?
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Let's take a look.
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Two common types of proxy are forward proxy and reverse proxy.
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A forward proxy is a server that sits between a group of client machines and the internet.
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When those clients make requests to websites on the internet the forward proxy acts as a middleman intercepts those requests
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and talks to the web servers on behalf of those client machines why would anyone want to do
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that here are a few reasons one a forward proxy protects
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the client's online identity by using a forward proxy to connect
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to a website the ip address of the client is hidden
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from the server only the ip address of the proxy is visible, it would be harder to trace back to the client.
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Two, a forward proxy can be used to bypass browsing restrictions.
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Some institutions like governments, schools, and big businesses use firewalls to restrict access to the internet.
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By connecting to a forward proxy outside the firewalls, the client machine can potentially get around these restrictions.
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It does not always work because the firewalls themselves could block the connections to the proxy.
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3. A forward proxy can be used to block access to certain content.
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It is not uncommon for schools
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and businesses to configure the networks to connect all clients to the web through the proxy
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and apply filtering rules to disallow sites like social networks.
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It is worth noting that a forward proxy normally requires a client to configure its application to point to it.
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For large institutions, they usually apply a technique called transparent proxies to streamline the process.
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A transparent proxy works with layer 4 switches to redirect certain types of traffic to the proxy automatically.
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There is no need to configure the client machines to use it.
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It is difficult to bypass a transparent proxy when the client is on the institution's network.
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In summary, a forward proxy sits between the client and the internet and acts on behalf of the client.
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Now let's take a look at the reverse proxy.
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A reverse proxy sits between the internet and the web servers.
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It intercepts the requests from the clients and talks to the web server on behalf of the clients.
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Why would a website use a reverse proxy?
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Here are a few good reasons.
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One, a reverse proxy could be used to protect a website.
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The website's IP addresses are hidden behind the reverse proxy and are not revealed to the clients.
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This makes it much harder to target a DDoS attack against a website.
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Second, a reverse proxy is used for load balancing.
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A popular website handling millions of users every day is unlikely to be able to handle the traffic with a single server.
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A reverse proxy can balance a large amount of incoming requests
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by distributing the traffic to a large pool of web servers and effectively preventing any single one of them from becoming overloaded.
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Note that this assumes that the reverse proxy can handle the incoming traffic.
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Services like Kyle Flare put reverse proxy servers in hundreds of locations all around the world.
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This puts the reverse proxy close to the users and at the same time provides a large amount of processing capacity.
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Third, a reverse proxy caches static content.
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A piece of content could be cached on the reverse proxy for a period of time.
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If the same piece of content is requested again from the reverse proxy, the locally cached version could be quickly returned.
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Fourth, a reverse proxy can handle SSL encryption.
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SSL handshake is computationally expensive.
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A reverse proxy can free up the origin servers from those expensive operations.
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Instead of handling SSL for all clients, a website only needs to handle SSL handshake from a small number of reverse proxies.
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Reverse proxies are everywhere.
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For a modern website, it is not uncommon to have many layers of reverse proxies.
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The first layer could be an edge service like Cloudflare.
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The reverse proxies are deployed to hundreds of locations worldwide close to the users.
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The second layer could be an API gateway or load balancer at the hosting provider.
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Many cloud providers combine these two layers into a single ingress service.
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The user would enter the cloud network at the edge close to the user.
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And from the edge, the reverse proxy connects over a fast fiber network to the load balancer, where the request is evenly distributed over a cluster of web servers.
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Vocabolario e note di pronuncia per questa lezione
Questa lezione di conversazione si basa sul video “Proxy vs Reverse Proxy”. Le parole che ritornano più spesso: proxy, reverse, client, server, forward. Questo video contiene 58 frasi e 786 parole da ripetere con lo shadowing. Il parlato dura 5:06. Chi parla ha un ritmo naturale di circa 154 parole al minuto, vicino a una conversazione quotidiana. Solo il 68% delle parole rientra nelle 3.000 più comuni dell’inglese, quindi il lessico è impegnativo.
Vocaboli chiave di questo video
15 parole del video che vale la pena imparare, con pronuncia e significato:
| Parola | Pronuncia | Significato |
|---|---|---|
| proxy sostantivo | /ˈpɹɑk.si/ | mandatario |
| reverse sostantivo | /ɹɪˈvɝs/ | contrario, opposto |
| server sostantivo | /ˈsɝvɚ/ | server |
| layer sostantivo | /ˈleɪ̯ɚ/ | strato |
| connect verbo | /kəˈnɛkt/ | connettere, connettersi |
| behalf sostantivo | /bɪˈhæf/ | a vantaggio di |
| transparent aggettivo | /tɹænsˈpæɹənt/ | trasparente |
| cache sostantivo | /kæʃ/ | nascondiglio, ripostiglio |
| cloud sostantivo | /ˈklaʊ̯d/ | nuvola, nube |
| institution sostantivo | /ˌɪn.stɪˈtʃuː.ʃən/ | istituzione |
| provider sostantivo | /pɹəˈvaɪ.də(ɹ)/ | fornitore |
| incoming aggettivo | /ˈɪnˌkʌmɪŋ/ | prossimo, in arrivo |
| distribute verbo | /dɪˈstɹɪbjuːt/ | distribuire |
| restriction sostantivo | /ɹɪˈstɹɪkʃən/ | restrizione |
| topic sostantivo | /ˈtɑpɪk/ | tema, categoria |
Pronuncia a cui fare attenzione
- I suoni “sh” e “zh”: cache /kæʃ/, institution /ˌɪn.stɪˈtʃuː.ʃən/, restriction /ɹɪˈstɹɪkʃən/, potentially /pəˈtɛnʃ(ə)li/, encryption /ɪnˈkɹɪpʃən/
- Parole lunghe — attenzione all’accento: institution /ˌɪn.stɪˈtʃuː.ʃən/, potentially /pəˈtɛnʃ(ə)li/, computationally /ˌkɑmpjʊˈteɪʃənəli/
I suoni difficili per chi parla italiano:
- /h/ — va soffiata, non è muta: behalf /bɪˈhæf/, handshake /ˈhæn(d)ˌʃeɪk/
- Consonante finale — senza aggiungere una vocale dopo: reverse /ɹɪˈvɝs/, connect /kəˈnɛkt/, behalf /bɪˈhæf/, transparent /tɹænsˈpæɹənt/, cache /kæʃ/
- /æ/ — più aperta della “e”: behalf /bɪˈhæf/, transparent /tɹænsˈpæɹənt/, cache /kæʃ/, bypass /ˈbaɪpæs/, static /ˈstæt.ɪk/
Come esercitarsi con questo video
- Ascolta tutto il video una volta senza parlare e annota le parole che non conosci.
- Inizia a velocità 0,75×, fai shadowing frase per frase e torna alla velocità normale quando diventa facile.
- Registrati e confronta con l’originale, facendo attenzione a parole come proxy, reverse, server.
Cos'è la tecnica dello Shadowing?
Shadowing è una tecnica di apprendimento delle lingue supportata da studi scientifici, originariamente sviluppata per la formazione dei traduttori professionisti e resa popolare dal poliglotta Dr. Alexander Arguelles. Il metodo è semplice ma potente: ascolti un audio in inglese di madrelingua e lo ripeti immediatamente ad alta voce — come un'ombra che segue il parlante con un ritardo di solo 1–2 secondi. A differenza dell'ascolto passivo o degli esercizi di grammatica, lo shadowing costringe il tuo cervello e i muscoli della bocca a elaborare e riprodurre simultaneamente i modelli di discorso reale. La ricerca dimostra che migliora significativamente la precisione della pronuncia, l'intonazione, il ritmo, il discorso connesso, la comprensione dell'ascolto e la fluidità del parlato — rendendolo uno dei metodi più efficaci per la preparazione alla prova di speaking dell'IELTS e per la comunicazione reale in inglese.