sing-box tun 模式不定时断流，需要重启

原版 openwrt/immortalwrt sing-box tun 模式不定时断流，症状是无法联网，需要重启后恢复。netstat 显示有大量 CLOSE_WAIT 连接。后来写了个定时脚本去 check ，CLOSE_WAIT 连接数超阀值了重启，改善不少，但偶尔还是会断流。 网上搜了，github issue 里有类似问题，但没找到有效解决办法。

求 V2 大神指导下～

客户端配置参考的是： https://www.right.com.cn/forum/thread-8314833-1-1.html

{ "log": { "disabled": false, "level": "debug", "timestamp": true }, "experimental": { "clash_api": { "external_controller": "127.0.0.1:9090", "external_ui": "ui", "external_ui_download_url": "", "external_ui_download_detour": "", "secret": "", "default_mode": "Rule" }, "cache_file": { "enabled": true, "path": "cache.db", "store_fakeip": true } }, "dns": { "servers": [ { "tag": "proxydns", "address": "tls://8.8.8.8/dns-query", "detour": "select" }, { "tag": "localdns", "address": "h3://223.5.5.5/dns-query", "detour": "direct" }, { "address": "rcode://refused", "tag": "block" }, { "tag": "dns_fakeip", "address": "fakeip" } ], "rules": [ { "outbound": "any", "server": "localdns", "disable_cache": true }, { "clash_mode": "Global", "server": "proxydns" }, { "clash_mode": "Direct", "server": "localdns" }, { "rule_set": "geosite-cn", "server": "localdns" }, { "rule_set": "geosite-geolocation-!cn", "server": "proxydns" }, { "rule_set": "geosite-geolocation-!cn", "query_type": [ "A", "AAAA" ], "server": "dns_fakeip" } ], "fakeip": { "enabled": true, "inet4_range": "198.18.0.0/15", "inet6_range": "fc00::/18" }, "independent_cache": true, "final": "proxydns" }, "inbounds": [ { "type": "tun", "inet4_address": "172.19.0.1/30", "inet6_address": "fd00::1/126", "auto_route": true, "stack": "system", "strict_route": false, "sniff": true, "sniff_override_destination": true, "domain_strategy": "prefer_ipv4" } ], "outbounds": [ { "type": "trojan", "tag": "trojan-us", "server": "XXX.XXX.XXX.XXX", "server_port": XXXXX, "password": "XXXXXX", "tls": { "enabled": true, "server_name": "XXX.XXX", "utls": { "enabled": true, "fingerprint": "firefox" } }, "multiplex": { "enabled": true } }, { "type": "hysteria2", "tag": "hy2-us", "server": "XXX.XXX.XXX.XXX", "server_port": XXXXX, "password": "XXXXXX", "tls": { "enabled": true, "server_name": "www.bing.com", "insecure": true, "alpn": [ "h3" ] } }, { "tag": "direct", "type": "direct" }, { "tag": "block", "type": "block" }, { "tag": "dns-out", "type": "dns" }, { "tag": "select", "type": "selector", "default": "auto", "outbounds": [ "auto", "trojan-us", "hy2-us" ] }, { "tag": "auto", "type": "urltest", "outbounds": [ "trojan-us", "hy2-us" ], "url": "https://www.gstatic.com/generate_204", "interval": "1m", "tolerance": 50, "interrupt_exist_connections": false } ], "route": { "rule_set": [ { "tag": "geosite-geolocation-!cn", "type": "remote", "format": "binary", "url": "https://cdn.jsdelivr.net/gh/MetaCubeX/meta-rules-dat@sing/geo/geosite/geolocation-!cn.srs", "download_detour": "select", "update_interval": "1d" }, { "tag": "geosite-cn", "type": "remote", "format": "binary", "url": "https://cdn.jsdelivr.net/gh/MetaCubeX/meta-rules-dat@sing/geo/geosite/geolocation-cn.srs", "download_detour": "select", "update_interval": "1d" }, { "tag": "geoip-cn", "type": "remote", "format": "binary", "url": "https://cdn.jsdelivr.net/gh/MetaCubeX/meta-rules-dat@sing/geo/geoip/cn.srs", "download_detour": "select", "update_interval": "1d" } ], "auto_detect_interface": true, "final": "select", "rules": [ { "domain_suffix": [ "synology.com", "plex.tv" ], "outbound": "direct" }, { "outbound": "dns-out", "protocol": "dns" }, { "clash_mode": "Direct", "outbound": "direct" }, { "clash_mode": "Global", "outbound": "auto" }, { "rule_set": "geoip-cn", "outbound": "direct" }, { "rule_set": "geosite-cn", "outbound": "direct" }, { "ip_is_private": true, "outbound": "direct" }, { "rule_set": "geosite-geolocation-!cn", "outbound": "auto" } ] }, "ntp": { "enabled": true, "server": "ntp.aliyun.com", "server_port": 123, "interval": "30m", "detour": "direct" } }