#3765·v2ray-core

listen Send-Q 128 tiny small ignoring somaxcon value

Author: 4-FLOSS-Free-Libre-Open-Source-SoftwareCreated Jun 28, 2026Updated Jul 8, 2026

What version of V2Ray are you using?

V2Ray 5.49.0 (V2Fly, a community-driven edition of V2Ray.) Custom (go1.26.1 linux/amd64

What's your scenario of using V2Ray?

)

TPROXY

What problems have you encountered?

drops and syncookies

What's your expectation?

respect sysctl values for listen() or allow sockopt

Please attach your configuration here

Server configuration:

// Please attach your server configuration here.
  {
      "tag": "tproxy",
      "listen": "::",
      "port": 12345,
      "protocol": "dokodemo-door",
      "settings": {
        "network": "tcp,udp",
        "followRedirect": true
      },
      "sniffing": {
        "enabled": true,
        "destOverride": [
          "fakedns"
        ],
        "metadataOnly": true
      },
      "streamSettings": {
        "sockopt": {
          "tproxy": "tproxy"
        }
      }
    },

Client configuration:

// Please attach your client configuration here.
?

Please attach error logs here

Server error log:

// Please attach your server error log here.

Client error log:

// Please attach your client error log here.

Please attach access log here

// Please attach your server access log here.
sudo ss -4lntpi 'sport = :12345'
sudo ss -6lntpi 'sport = :12345'
State                           Recv-Q                           Send-Q                                                     Local Address:Port                                                      Peer Address:Port                           Process
State                  Recv-Q                 Send-Q                                 Local Address:Port                                  Peer Address:Port                 Process
LISTEN                 0                      128                                                *:12345                                             *:*                     users:(("v2ray",pid=2570268,fd=15))
         bbr cwnd:10 reordering:2147483647 tcp-ulp-mptcp
LISTEN                 0                      128                                                *:12345                                             *:*                     users:(("v2ray",pid=2570268,fd=27))
         bbr cwnd:10 reordering:2147483647 tcp-ulp-mptcp           

Other configurations (such as Nginx) and logs here

If V2Ray cannot start up, please attach output from --test command

If V2Ray service is abnormal, please attach journal log here