Release iPShadowT v2.2.1 — Bug Fix Release · iPmartNetwork/iPShadowT

Anti-DPI Multi-Transport Tunnel Engine

Overview

This patch release fixes asymmetric upload performance on tcpmux tunnels — the common Iran client → foreign server setup where download was fine but upload stayed low.

All improvements are port-agnostic: they apply whether you run on 443, 8443, or any custom port. No per-user port mapping required.


Version	`v2.2.1`
Type	Bug fix (semver patch)
Date	2026-06-01
Previous	v2.2.0
Repository	iPmartNetwork/iPShadowT

Highlights

Area	Before (v2.2.0)	After (v2.2.1)
TCP send/recv buffers	Config ignored on `tcpmux`	Applied on every connection via `SO_SNDBUF` / `SO_RCVBUF`
Relay copy buffer	32 KB (`io.Copy` default)	256 KB on mux + server relay
`kernel_tuning = true`	Defined, never executed	Runs at client/server startup (Linux)
`upload_boost` profile	Missing in sysctl layer	BBR + 16 MB windows + `tcp_notsent_lowat`
Default buffers	4 MB mux / unset TCP	16 MB TCP + 8 MB smux when unset
Manager script	`balanced` + fragment on	`upload_boost` default, fragment/padding off for speed
Auto-updater	Wrong GitHub org	`iPmartNetwork/iPShadowT`

What Was Fixed

Core engine

internal/utils/tcpopt.go — Central TCP tuning (TLS unwrap, listener wrapper, large relay buffers)
tcpmux — Socket buffers on dial and accept
Client / Server — kernel_tuning wired; upload buffer logging at startup
Config — Upload-friendly defaults + full upload_boost profile support
Mux relay — 256 KB bidirectional copy for upload and download paths

Install & ops

ipshadowt-manager.sh — Client wizard defaults to upload_boost, kernel_tuning = true
Multi-tunnel & export — Generated configs include upload tuning
Sysctl (install) — tcp_window_scaling, tcp_notsent_lowat added to base tuning

Misc

CLI default version corrected (v2.2.1)
Docker ARG VERSION=2.2.1
Systemd / updater URLs point to iPmartNetwork/iPShadowT

Traffic path (upload)

App → SOCKS5 (Iran client)
  → smux stream (8 MB buffer)
  → TCP tunnel (SO_SNDBUF 16 MB)
  → Foreign server (SO_RCVBUF 16 MB)
  → Internet

Upgrade

Update both sides — client (Iran) and server (abroad) — for best results.

Option A — Manager script (recommended)

curl -fsSL https://raw.githubusercontent.com/iPmartNetwork/iPShadowT/master/deploy/ipshadowt-manager.sh -o ipshadowt-manager.sh
sudo bash ipshadowt-manager.sh
# Menu → Update binary → Restart service

Option B — Binary only

Linux AMD64

wget https://github.com/iPmartNetwork/iPShadowT/releases/download/v2.2.1/ipshadowt-linux-amd64
chmod +x ipshadowt-linux-amd64
sudo install -m 755 ipshadowt-linux-amd64 /usr/local/bin/ipshadowt
sudo systemctl restart ipshadowt

Linux ARM64

wget https://github.com/iPmartNetwork/iPShadowT/releases/download/v2.2.1/ipshadowt-linux-arm64
chmod +x ipshadowt-linux-arm64
sudo install -m 755 ipshadowt-linux-arm64 /usr/local/bin/ipshadowt
sudo systemctl restart ipshadowt

Option C — Docker

docker pull ghcr.io/ipmartnetwork/ipshadowt:2.2.1

Recommended configuration

Minimal snippet — works with any port:

[performance]
nodelay = true
buffer_profile = "upload_boost"   # balanced | high_throughput | low_cpu
kernel_tuning = true              # Linux + root: BBR & TCP windows

For maximum upload on tcpmux, keep anti-DPI overhead off:

[anti_dpi]
enabled = false
# fragment = false
# padding = false
# traffic_shape = false

Full examples: configs/client-upload-boost.toml

Verify after upgrade

ipshadowt -v shows v2.2.1
Log contains: Upload tuning: send_buf=16777216 recv_buf=16777216 ...
On Linux with root: sysctl net.ipv4.tcp_congestion_control → bbr
Upload test improved vs v2.2.0 on same port

Assets

Platform	Binary
Linux AMD64	`ipshadowt-linux-amd64`
Linux ARM64	`ipshadowt-linux-arm64`
Linux ARMv7	`ipshadowt-linux-armv7`
Windows AMD64	`ipshadowt-windows-amd64.exe`
macOS Intel	`ipshadowt-darwin-amd64`
macOS Apple Silicon	`ipshadowt-darwin-arm64`
Docker	`ghcr.io/ipmartnetwork/ipshadowt:2.2.1`

Checksums: SHA256SUMS.txt · MD5SUMS.txt in release assets.

Full changelog

See CHANGELOG.md for complete commit-level details.

_{Made with ❤️ by iPmart Network}

iPShadowT v2.2.1
_{Bug Fix Release · Upload Throughput · Port-Independent}

Overview

This patch release fixes asymmetric upload performance on tcpmux tunnels — the common Iran client → foreign server setup where download was fine but upload stayed low.

All improvements are port-agnostic: they apply whether you run on 443, 8443, or any custom port. No per-user port mapping required.


Version	`v2.2.1`
Type	Bug fix (semver patch)
Date	2026-06-01
Previous	v2.2.0
Repository	iPmartNetwork/iPShadowT

Highlights

Area	Before (v2.2.0)	After (v2.2.1)
TCP send/recv buffers	Config ignored on `tcpmux`	Applied on every connection via `SO_SNDBUF` / `SO_RCVBUF`
Relay copy buffer	32 KB (`io.Copy` default)	256 KB on mux + server relay
`kernel_tuning = true`	Defined, never executed	Runs at client/server startup (Linux)
`upload_boost` profile	Missing in sysctl layer	BBR + 16 MB windows + `tcp_notsent_lowat`
Default buffers	4 MB mux / unset TCP	16 MB TCP + 8 MB smux when unset
Manager script	`balanced` + fragment on	`upload_boost` default, fragment/padding off for speed
Auto-updater	Wrong GitHub org	`iPmartNetwork/iPShadowT`

What Was Fixed

Core engine

internal/utils/tcpopt.go — Central TCP tuning (TLS unwrap, listener wrapper, large relay buffers)
tcpmux — Socket buffers on dial and accept
Client / Server — kernel_tuning wired; upload buffer logging at startup
Config — Upload-friendly defaults + full upload_boost profile support
Mux relay — 256 KB bidirectional copy for upload and download paths

Install & ops

ipshadowt-manager.sh — Client wizard defaults to upload_boost, kernel_tuning = true
Multi-tunnel & export — Generated configs include upload tuning
Sysctl (install) — tcp_window_scaling, tcp_notsent_lowat added to base tuning

Misc

CLI default version corrected (v2.2.1)
Docker ARG VERSION=2.2.1
Systemd / updater URLs point to iPmartNetwork/iPShadowT

Traffic path (upload)

App → SOCKS5 (Iran client)
  → smux stream (8 MB buffer)
  → TCP tunnel (SO_SNDBUF 16 MB)
  → Foreign server (SO_RCVBUF 16 MB)
  → Internet

Upgrade

Update both sides — client (Iran) and server (abroad) — for best results.

Option A — Manager script (recommended)

curl -fsSL https://raw.githubusercontent.com/iPmartNetwork/iPShadowT/master/deploy/ipshadowt-manager.sh -o ipshadowt-manager.sh
sudo bash ipshadowt-manager.sh
# Menu → Update binary → Restart service

Option B — Binary only

Linux AMD64

wget https://github.com/iPmartNetwork/iPShadowT/releases/download/v2.2.1/ipshadowt-linux-amd64
chmod +x ipshadowt-linux-amd64
sudo install -m 755 ipshadowt-linux-amd64 /usr/local/bin/ipshadowt
sudo systemctl restart ipshadowt

Linux ARM64

wget https://github.com/iPmartNetwork/iPShadowT/releases/download/v2.2.1/ipshadowt-linux-arm64
chmod +x ipshadowt-linux-arm64
sudo install -m 755 ipshadowt-linux-arm64 /usr/local/bin/ipshadowt
sudo systemctl restart ipshadowt

Option C — Docker

docker pull ghcr.io/ipmartnetwork/ipshadowt:2.2.1

Recommended configuration

Minimal snippet — works with any port:

[performance]
nodelay = true
buffer_profile = "upload_boost"   # balanced | high_throughput | low_cpu
kernel_tuning = true              # Linux + root: BBR & TCP windows

For maximum upload on tcpmux, keep anti-DPI overhead off:

[anti_dpi]
enabled = false
# fragment = false
# padding = false
# traffic_shape = false

Full examples: configs/client-upload-boost.toml

Verify after upgrade

ipshadowt -v shows v2.2.1
Log contains: Upload tuning: send_buf=16777216 recv_buf=16777216 ...
On Linux with root: sysctl net.ipv4.tcp_congestion_control → bbr
Upload test improved vs v2.2.0 on same port

Assets

Platform	Binary
Linux AMD64	`ipshadowt-linux-amd64`
Linux ARM64	`ipshadowt-linux-arm64`
Linux ARMv7	`ipshadowt-linux-armv7`
Windows AMD64	`ipshadowt-windows-amd64.exe`
macOS Intel	`ipshadowt-darwin-amd64`
macOS Apple Silicon	`ipshadowt-darwin-arm64`
Docker	`ghcr.io/ipmartnetwork/ipshadowt:2.2.1`

Checksums: SHA256SUMS.txt · MD5SUMS.txt in release assets.

Full changelog

See CHANGELOG.md for complete commit-level details.

_{Made with ❤️ by iPmart Network}

Full Changelog: v2.2.0...v2.2.1

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Anti-DPI Multi-Transport Tunnel Engine

Overview

Highlights

What Was Fixed

Core engine

Install & ops

Misc

Traffic path (upload)

Upgrade

Option A — Manager script (recommended)

Option B — Binary only

Option C — Docker

Recommended configuration

Verify after upgrade

Assets

Full changelog

Overview

Highlights

What Was Fixed

Core engine

Install & ops

Misc

Traffic path (upload)

Upgrade

Option A — Manager script (recommended)

Option B — Binary only

Option C — Docker

Recommended configuration

Verify after upgrade

Assets

Full changelog

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