RTC calls not connecting while using a custom singbox SSH config

[DevPIXL]

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What Happened?

{ "log": { "level": "warn", "output": "box.log", "timestamp": true }, "dns": { "servers": [ { "tag": "dns-remote", "address": "tls://1.1.1.1", "address_resolver": "dns-direct" }, { "tag": "dns-trick-direct", "address": "https://sky.rethinkdns.com/", "detour": "direct-fragment" }, { "tag": "dns-direct", "address": "1.1.1.1", "address_resolver": "dns-local", "detour": "direct" }, { "tag": "dns-local", "address": "local", "detour": "direct" }, { "tag": "dns-block", "address": "rcode://success" } ], "rules": [ { "domain_suffix": ".ir", "geosite": "ir", "server": "dns-direct" }, { "domain": "cp.cloudflare.com", "server": "dns-remote", "rewrite_ttl": 3000 } ], "final": "dns-remote", "static_ips": { "sky.rethinkdns.com": [ "188.114.98.0", "188.114.99.0", "104.18.203.232", "104.18.202.232", "188.114.99.0", "188.114.98.0" ] }, "independent_cache": true }, "inbounds": [ { "type": "tun", "tag": "tun-in", "mtu": 9000, "inet4_address": "172.19.0.1/28", "auto_route": true, "strict_route": true, "endpoint_independent_nat": true, "stack": "mixed", "sniff": true, "sniff_override_destination": true }, { "type": "mixed", "tag": "mixed-in", "listen": "127.0.0.1", "listen_port": 2334, "sniff": true, "sniff_override_destination": true }, { "type": "direct", "tag": "dns-in", "listen": "127.0.0.1", "listen_port": 6450, "override_address": "1.1.1.1", "override_port": 53 } ], "outbounds": [ { "type": "selector", "tag": "select", "outbounds": [ "auto", "proxy" ], "default": "auto" }, { "type": "urltest", "tag": "auto", "outbounds": [ "proxy" ], "url": "http://cp.cloudflare.com/", "interval": "10m0s", "idle_timeout": "1h40m0s" }, { "type": "ssh", "tag": "proxy", "server": "آدرس SSH", "server_port": "پورت SSH", "user": "یوزر SSH", "password": "پسورد SSH" }, { "type": "dns", "tag": "dns-out" }, { "type": "direct", "tag": "direct" }, { "type": "direct", "tag": "direct-fragment", "tls_fragment": { "enabled": true, "size": "1-500", "sleep": "0-500" } }, { "type": "direct", "tag": "bypass" }, { "type": "block", "tag": "block" } ], "route": { "geoip": { "path": "geo-assets/sagernet-sing-geoip-geoip.db" }, "geosite": { "path": "geo-assets/sagernet-sing-geosite-geosite.db" }, "rules": [ { "inbound": "dns-in", "outbound": "dns-out" }, { "port": 53, "outbound": "dns-out" }, { "clash_mode": "Direct", "outbound": "direct" }, { "clash_mode": "Global", "outbound": "select" }, { "domain_suffix": ".ir", "geosite": "ir", "geoip": "ir", "outbound": "bypass" } ], "final": "select", "auto_detect_interface": true, "override_android_vpn": true }, "experimental": { "cache_file": { "enabled": true, "path": "clash.db" }, "clash_api": { "external_controller": "127.0.0.1:6756", "secret": "sFZ9P24RXZRKp0uk" } } }

This is a template for my SSH config. It works fine except when I try voice/video calling on Telegram and when I wanna connect to a Discord voice channel, using Hiddify android and iPhone clients.

I tried changing all variations of Config options in the Hiddify client, yet the problem persisted. Let's say the UDPGW port of my SSH VPN server is: 7302, how can I fix this Issue in my config? Thank you.

Minimal Reproducible Example (MRE)

1. Connect to a custom Singbox SSH config matching the template provided (on any smartphone).
2. Try calling someone on Telegram or connect to any discord voice channel.

Expected Behavior

The apps show "Connecting" or "RTC Connecting" and get stuck on said status.

Version

Tried on 1.5.2 and 2.0.5 and latest iOS dev build on AppStore

Platform/OS

Android, iOS

Additional Context

No response

Application Config Options

{
  "region": "ir",
  "block-ads": false,
  "execute-config-as-is": false,
  "log-level": "warn",
  "resolve-destination": false,
  "ipv6-mode": "ipv4_only",
  "remote-dns-address": "tls://1.1.1.1",
  "remote-dns-domain-strategy": "",
  "direct-dns-address": "1.1.1.1",
  "direct-dns-domain-strategy": "",
  "mixed-port": 2334,
  "tproxy-port": 2335,
  "local-dns-port": 6450,
  "tun-implementation": "mixed",
  "mtu": 9000,
  "strict-route": true,
  "connection-test-url": "http://connectivitycheck.gstatic.com/generate_204",
  "url-test-interval": 600,
  "enable-clash-api": true,
  "clash-api-port": 6756,
  "enable-tun": true,
  "enable-tun-service": false,
  "set-system-proxy": false,
  "bypass-lan": false,
  "allow-connection-from-lan": false,
  "enable-fake-dns": false,
  "enable-dns-routing": true,
  "independent-dns-cache": true,
  "rules": [],
  "mux": {
    "enable": false,
    "padding": false,
    "max-streams": 8,
    "protocol": "h2mux"
  },
  "tls-tricks": {
    "enable-fragment": false,
    "fragment-size": "1-500",
    "fragment-sleep": "0-500",
    "mixed-sni-case": false,
    "enable-padding": false,
    "padding-size": "1-1500"
  },
  "warp": {
    "enable": false,
    "mode": "proxy_over_warp",
    "wireguard-config": "",
    "license-key": "",
    "account-id": "",
    "access-token": "",
    "clean-ip": "auto",
    "clean-port": 0,
    "noise": "5-10",
    "noise-delay": "20-200"
  },
  "warp2": {
    "enable": false,
    "mode": "proxy_over_warp",
    "wireguard-config": "",
    "license-key": "",
    "account-id": "",
    "access-token": "",
    "clean-ip": "auto",
    "clean-port": 0,
    "noise": "5-10",
    "noise-delay": "20-200"
  }
}

Relevant log output

Are you willing to submit a PR? If you know how to fix the bug.

• [ ] I'm willing to submit a PR (Thank you!)

[hiddify-com]

because ssh won't support UDP packets