*Descriere:
![[C++] Server-Side vs. Client-Side Integrity in Metin2: Addressing Speed Hacks, Wall Hacks, and Animation Exploits - Mesaj 1 - Imagine 1](./download/file.php?mode=view&id=11913 "[C++] Server-Side vs. Client-Side Integrity in Metin2: Addressing Speed Hacks, Wall Hacks, and Animation Exploits - Mesaj 1 - Imagine 1")
STOP, TRAVELER!
Stop, traveler! This soil you walk upon unknowingly
Is where an era came to an end.
Bend down and listen, this quiet mound
Is where the heart of a nation beats.
This lonely, silent, forsaken hill
Is where all thoughts of heroes turned to blood.
Drop by, press your ear to this silent mound,
Because this flood is where a nation's freedom was won.
Greetings from Türkiye
All of this belongs to Gemini.
v2
https://virusscan.jotti.org/en-US/files ... vm9259w4zt
https://www.mediafire.com/file/7i1qe1ft ... 2.zip/file
Securing a game like Metin2 against client-side manipulation presents a constant architectural tug-of-war. Developers must continuously weigh the security benefits of server-side authoritative checks against the fluid user experience required for fast-paced gameplay, especially during intense player-versus-player (PvP) scenarios.
Below is an analysis of the core anti-cheat mechanisms discussed, evaluating how they handle speed validation, movement boundaries, and animation modifications, along with the inherent challenges of server-side latency.
1. Movement and Attack Speed Validation
Managing speed variables (fspeedratio, speedratio, fatksped, fmovspd, umovspd, uatkspd, matkspd) requires strict synchronization between the client and the server.
Current Implementation: The client continuously transmits its current speed metrics to the server. If the server-side calculations match the expected values based on buffs, items, and status, it remains passive. If a discrepancy or unauthorized speed boost is detected, the server instantly overrides the client's speed, forces synchronization, and can be configured to execute harsher penalties like dropping the connection (Disconnect/DC) or issuing a hardware ID (HWID) ban.
The Latency Challenge: Purely server-authoritative movement calculations often struggle with network jitter and ping variations. During duels (WS), skill knockbacks or rapid positional shifts can cause minor rubber-banding if the server's tolerance thresholds are too strict. Designing a completely server-authoritative model requires complex interpolation and leeway buffers to prevent false positives caused by normal network latency.
2. Wall Hack Prevention (Attribute/Collision Checks)
Stopping wall hacks relies heavily on map collision data (attr files within map folders).
Mechanism: When a player attempts to pass through blocked coordinates or collides with invisible boundaries, the system evaluates the intended destination against map attribute blocks. If an invalid position is detected, the character is immediately snapped back to the nearest valid location.
Security Consideration: While effective at stopping basic clipping, optimization is critical. Processing every coordinate change server-side can introduce overhead on high-population servers unless spatial partitioning or optimized raycasting is used.
3. Animation and File Modification Detection (.msa / .gr2)
Cheaters frequently alter motion files (.msa) to cancel attack animations, remove recovery frames, or achieve instant skill execution (e.g., bypassing standard cooldowns or weapon swing animations by renaming or modifying file hooks).
Detection Approach:
Monitoring file integrity or tracking when a client attempts to load unexpected or renamed motion assets.
When a mismatch or unauthorized modification to .msa file names/hashes is spotted, the server can flag the behavior, disconnect the player, or force-reset the client motions back to factory defaults.
File Protection: Utilizing custom packed formats (such as modified FoxFS implementations) helps secure core assets against casual extraction and tampering, though supplementary integrity checks remain necessary to catch memory-injected modifications.
*Poze / Video (obligatoriu):
1
*Link download:
2
*Link scanare VirusTotal (obligatoriu):
3
STOP, TRAVELER!
Stop, traveler! This soil you walk upon unknowingly
Is where an era came to an end.
Bend down and listen, this quiet mound
Is where the heart of a nation beats.
This lonely, silent, forsaken hill
Is where all thoughts of heroes turned to blood.
Drop by, press your ear to this silent mound,
Because this flood is where a nation's freedom was won.
Greetings from Türkiye
All of this belongs to Gemini.
v2
https://virusscan.jotti.org/en-US/files ... vm9259w4zt
https://www.mediafire.com/file/7i1qe1ft ... 2.zip/file
Securing a game like Metin2 against client-side manipulation presents a constant architectural tug-of-war. Developers must continuously weigh the security benefits of server-side authoritative checks against the fluid user experience required for fast-paced gameplay, especially during intense player-versus-player (PvP) scenarios.
Below is an analysis of the core anti-cheat mechanisms discussed, evaluating how they handle speed validation, movement boundaries, and animation modifications, along with the inherent challenges of server-side latency.
1. Movement and Attack Speed Validation
Managing speed variables (fspeedratio, speedratio, fatksped, fmovspd, umovspd, uatkspd, matkspd) requires strict synchronization between the client and the server.
Current Implementation: The client continuously transmits its current speed metrics to the server. If the server-side calculations match the expected values based on buffs, items, and status, it remains passive. If a discrepancy or unauthorized speed boost is detected, the server instantly overrides the client's speed, forces synchronization, and can be configured to execute harsher penalties like dropping the connection (Disconnect/DC) or issuing a hardware ID (HWID) ban.
The Latency Challenge: Purely server-authoritative movement calculations often struggle with network jitter and ping variations. During duels (WS), skill knockbacks or rapid positional shifts can cause minor rubber-banding if the server's tolerance thresholds are too strict. Designing a completely server-authoritative model requires complex interpolation and leeway buffers to prevent false positives caused by normal network latency.
2. Wall Hack Prevention (Attribute/Collision Checks)
Stopping wall hacks relies heavily on map collision data (attr files within map folders).
Mechanism: When a player attempts to pass through blocked coordinates or collides with invisible boundaries, the system evaluates the intended destination against map attribute blocks. If an invalid position is detected, the character is immediately snapped back to the nearest valid location.
Security Consideration: While effective at stopping basic clipping, optimization is critical. Processing every coordinate change server-side can introduce overhead on high-population servers unless spatial partitioning or optimized raycasting is used.
3. Animation and File Modification Detection (.msa / .gr2)
Cheaters frequently alter motion files (.msa) to cancel attack animations, remove recovery frames, or achieve instant skill execution (e.g., bypassing standard cooldowns or weapon swing animations by renaming or modifying file hooks).
Detection Approach:
Monitoring file integrity or tracking when a client attempts to load unexpected or renamed motion assets.
When a mismatch or unauthorized modification to .msa file names/hashes is spotted, the server can flag the behavior, disconnect the player, or force-reset the client motions back to factory defaults.
File Protection: Utilizing custom packed formats (such as modified FoxFS implementations) helps secure core assets against casual extraction and tampering, though supplementary integrity checks remain necessary to catch memory-injected modifications.
*Poze / Video (obligatoriu):
1
*Link download:
2
*Link scanare VirusTotal (obligatoriu):
3
