MARVEL SNAP Proxy: Which Traffic Goes Through the Tunnel and Which Does Not?

Card games occupy a distinctive place on the network side. You do not stream constant position and aiming data to the server; over a turn you make your decision, send it and wait for the result. The exchange is short, infrequent and small. That means a structure more tolerant of latency than a shooter, but tolerant does not mean insensitive.

Turns are timed. When the connection stalls for a moment, what you lose is not a few frames but potentially a whole turn. That is why what matters in this game is not average speed but an uninterrupted, predictable connection.

The sections below address three separate questions: which part of this game's traffic a proxy rule can actually carry, what the difference between the store client and the game's own connection means, and why the common expectation about what determines region behaviour goes unmet.

The network profile of a turn-based card game

When the game opens, the client verifies your identity, requests your collection and decks from the server and draws the interface. Up to that point the traffic is ordinary HTTPS requests. Once a match begins the rhythm changes: a small message goes out each turn, the server determines the result and sends it back. Volume is low and frequency is moderate.

The critical point is who determines the outcome. The client does not compute a card's effect itself and report it to the server; the decision sits on the server. On the network side that means two things. First, when the connection drops, the client has no result to display and the screen waits. Second, latency does not directly change the game's outcome; it only shortens the time you have to make a decision.

This is why the turn timer matters. A stall while the timer is running can cost more than a stumble in an action game: by the time you are back, the turn may already have closed. And that is exactly the quality to look for in a proxy decision — not a high best-case speed, but a narrow fluctuation range and a connection that does not drop.

A third traffic item is the interface itself. Card art, variants and collection screens are visually heavy and are downloaded the first time they are displayed. This item is far larger in volume than match traffic and is noticeable on a metered exit.

What the tunnel carries: TCP, UDP and the real scope of the rule

An HTTP proxy opens a tunnel for HTTPS targets with the CONNECT method, and only TCP flows through that tunnel. This is the nature of the protocol and cannot be changed with a setting. How the method works is explained in detail in the the HTTP CONNECT method article. No channel the application speaks over UDP can enter this tunnel; that includes HTTP/3 traffic running over UDP 443.

SOCKS5 On the side of the situation is more flexible, but not automatic. The protocol's UDP ASSOCIATE method can carry UDP; however, for that to work the proxy server must offer the method and the client must be written to use it. Most game clients do not speak SOCKS5, and operating-system level proxy settings do not wrap arbitrary UDP flows. Details SOCKS5 UDP support article.

The practical consequence should be stated honestly: in most games a proxy rule covers login, account, store, interface and download traffic; whether the match channel is covered depends on the client's choices. It is not possible to say from the outside with certainty which game carries which channel over which protocol; the right approach is not to assume but to observe the behaviour after setup.

Observation works like this: apply the rule, verify your exit address from a checking page outside the game, then open the game and see whether the behaviour changes. If the exit address has changed but the game's behaviour has not changed at all, the game's main channel is probably falling outside the rule's scope. That is not a fault; it is the limit of the protocol.

The store client, patch downloads and the game's own connection

On desktop, the game is usually installed and updated through a store client. That client is a separate application: it has its own download engine, its own connection pool and often its own proxy setting. When you launch the game, the game establishes its own connections. The two run on the same machine but do not have to share the same rule.

This split produces surprising results in both directions. You may define a proxy for the store client and assume the game's traffic is routed too; or conversely, when you apply a system-wide setting, the store client's enormous downloads also enter the tunnel and your allowance drains unexpectedly. An example of how settings on the store side work can be found in the store client proxy settings article; on desktop, per-application routing is more suitable for narrowing the scope, and the Windows proxy settings page lists the basic options.

On mobile the split is even sharper. Updates coming from the app store sit outside the game's own connection, and in-app purchases also run through the operating system's store process. A rule you write for the game does not cover these two flows. That is usually good news: patches do not come out of your metered exit.

The practical recommendation is this: deliberately separate downloading from playing. Take the patch on an unmetered line and open the game through the proxy. That way your allowance plan stays predictable and your download speed is not limited by the extra hop in between.

Where does the monthly volume accumulate?

In this game, volume comes from the images you see far more than the matches you play. On release days, patches and asset packages are the heaviest item; collection, store and interface screens come second. The match traffic itself is small: the messages sent between turns are short and infrequent.

The meaning of this distribution for your allowance is clear. On a metered exit, all of the savings are hidden in the first two items, and both are predictable events — the calendar is known and you can choose when to download. Trying to cut match traffic is neither possible nor meaningful; it is already a small part of the volume. How to do the calculation bandwidth calculation article.

A fourth item is telemetry and notification traffic. It is small but continuous and keeps going as long as the app stays open in the background. Leaving sessions open on more than one device multiplies this item; every open client sends its own requests.

Base your allowance plan on measurement. Over one release cycle, note the consumption in your panel event by event; after two cycles you will have an estimate far more reliable than an average, and your package decision will rest on records rather than guesses.