1. 编辑 i2Share 配置文件/data/i2share/webhub_settings.py
增加AUTO_FILE_SERVER_ROOT_PATH = 'filehttp'
停止服务i2share-admin stop
启动服务i2share-admin start

2.修改 nginx 配置文件/etc/nginx/conf.d/i2share.conf
增加server监听内网的800端口
执行 nginx -s reload 使配置生效

3.改完后外网依旧无法下载，打开浏览器debug模式发现下载地址端口不对，将端口写入文件
map $host  $the_port {
    default $http_x_forwarded_port;
    "106.41.69.46" "8000";
}

配置如下
gzip on; #开启Gzip
gzip_min_length 1k; #不压缩临界值，大于1K的才压缩
gzip_comp_level 3; #压缩级别，1-10，数字越大压缩性能的越好，越消耗服务器资源
gzip_types text/plain application/javascript application/x-javascript text/css application/xml text/javascript application/x-httpd-php  image/gif image/png; #进行压缩的文件，切勿添加jpg
gzip_vary on;
gzip_disable "MSIE [1-6]\.";
map $http_x_forwarded_proto $the_scheme {
    default $http_x_forwarded_proto;
    "" $scheme;
}
map $http_x_forwarded_host $the_host {
    default $http_x_forwarded_host;
    "" $host;
}
map $http_upgrade $proxy_connection {
    default upgrade;
    "" close;
}
map $http_x_forwarded_port $the_port {
    default $http_x_forwarded_port;
    "" $server_port;
}
map $host  $the_port {
    default $http_x_forwarded_port;
    "106.41.69.46" "8000";
}
server {
    listen  80;
    server_name 192.168.0.8;   # 请替换$I2SHARE_SERVER_IP_OR_DOMAIN为实际的服务器接入IP或域名
    server_tokens off;
    proxy_set_header X-Forwarded-For $remote_addr;
    if ($request_method !~* GET|POST|PUT|DELETE|HEAD) {
        return 405;
    }
    set $lang $http_accept_language;
    if ($http_accept_language ~* ^zh-Hant){
        set $lang "zh-Hant";
    }
    location / {
        proxy_pass         http://127.0.0.1:8000;
        proxy_set_header   Host $http_host;
        proxy_set_header   X-Real-IP $remote_addr;
        proxy_set_header   X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header   X-Forwarded-Host $the_host;
        proxy_set_header   X-Forwarded-Port $the_port;
        proxy_set_header   X-Forwarded-Proto $the_scheme;
        proxy_set_header   Accept-Language $lang;
        proxy_read_timeout  1200s;
        # used for view/edit office file via Office Online Server
        client_max_body_size 0;
        access_log      /var/log/nginx/i2share.access.log;
        error_log       /var/log/nginx/i2share.error.log;
    }
    location /filehttp {
        rewrite ^/filehttp(.*)$ $1 break;
        proxy_pass http://127.0.0.1:8082;
        client_max_body_size 0;
        proxy_connect_timeout  36000s;
        proxy_read_timeout  36000s;
        proxy_max_temp_file_size 0;
        proxy_buffering  off;
    }
    location /media {
        root /data/i2share/i2share-server/websvr;
    }
    location /frontend {
        root /data/i2share/i2share-server/websvr;
    }
    # 如需使用onlyoffice服务作为在线编辑第三方组件，请取消以下注释并填写onlyoffice服务的URL值
    #location /onlyofficeds/ {
    #    # THIS ONE IS IMPORTANT ! - Trailing slash !
    #    # 在线编辑服务地址
    #    proxy_pass $ONLYOFFICE_SERVICE_URL;  #请替换$ONLYOFFICE_SERVICE_URL为onlyoffice服务的URL，URL最后必须以"/"结尾
    #    proxy_http_version 1.1;
    #    client_max_body_size 100M;  # 限制文档最大尺寸为100M
    #    proxy_read_timeout 3600s;
    #    proxy_connect_timeout 3600s;
    #    proxy_set_header Upgrade $http_upgrade;
    #    proxy_set_header Connection $proxy_connection;
    #    # THIS ONE IS IMPORTANT ! - Subfolder and NO trailing slash !
    #    proxy_set_header X-Forwarded-Host $the_host/onlyofficeds;
    #    proxy_set_header X-Forwarded-Proto $the_scheme;
    #    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    #}
    # 如需支持webdav，请取消以下注释
    #location /i2sharedav {
    #    proxy_pass         http://127.0.0.1:8080;
    #    proxy_set_header   Host $http_host;
    #    proxy_set_header   X-Real-IP $remote_addr;
    #    proxy_set_header   X-Forwarded-For $proxy_add_x_forwarded_for;
    #    proxy_set_header   X-Forwarded-Host $the_host;
    #    proxy_set_header   X-Forwarded-Port $the_port;
    #    proxy_set_header   X-Forwarded-Proto $scheme;
    #    proxy_set_header   Accept-Language $lang;
    #    proxy_read_timeout  1200s;
    #    client_max_body_size 0;
    #    proxy_max_temp_file_size 0;
    #    proxy_buffering  off;
    #    access_log      /var/log/nginx/i2share.webdav.access.log;
    #    error_log       /var/log/nginx/i2share.webdav.error.log;
    #}
}
server {
    listen  800;
    server_name 106.41.69.46;   # 请替换$I2SHARE_SERVER_IP_OR_DOMAIN为实际的服务器接入IP或域名
    server_tokens off;
    proxy_set_header X-Forwarded-For $remote_addr;
    if ($request_method !~* GET|POST|PUT|DELETE|HEAD) {
        return 405;
    }
    set $lang $http_accept_language;
    if ($http_accept_language ~* ^zh-Hant){
        set $lang "zh-Hant";
    }
    location / {
        proxy_pass         http://127.0.0.1:8000;
        proxy_set_header   Host $http_host;
        proxy_set_header   X-Real-IP $remote_addr;
        proxy_set_header   X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header   X-Forwarded-Host $the_host;
        proxy_set_header   X-Forwarded-Port $the_port;
        proxy_set_header   X-Forwarded-Proto $the_scheme;
        proxy_set_header   Accept-Language $lang;
        proxy_read_timeout  1200s;
        # used for view/edit office file via Office Online Server
        client_max_body_size 0;
        access_log      /var/log/nginx/i2share.access.log;
        error_log       /var/log/nginx/i2share.error.log;
    }
    location /filehttp {
        rewrite ^/filehttp(.*)$ $1 break;
        proxy_pass http://127.0.0.1:8082;
        client_max_body_size 0;
        proxy_connect_timeout  36000s;
        proxy_read_timeout  36000s;
        proxy_max_temp_file_size 0;
        proxy_buffering  off;
    }
    location /media {
        root /data/i2share/i2share-server/websvr;
    }
    location /frontend {
        root /data/i2share/i2share-server/websvr;
    }
    # 如需使用onlyoffice服务作为在线编辑第三方组件，请取消以下注释并填写onlyoffice服务的URL值
    #location /onlyofficeds/ {
    #    # THIS ONE IS IMPORTANT ! - Trailing slash !
    #    # 在线编辑服务地址
    #    proxy_pass $ONLYOFFICE_SERVICE_URL;  #请替换$ONLYOFFICE_SERVICE_URL为onlyoffice服务的URL，URL最后必须以"/"结尾
    #    proxy_http_version 1.1;
    #    client_max_body_size 100M;  # 限制文档最大尺寸为100M
    #    proxy_read_timeout 3600s;
    #    proxy_connect_timeout 3600s;
    #    proxy_set_header Upgrade $http_upgrade;
    #    proxy_set_header Connection $proxy_connection;
    #    # THIS ONE IS IMPORTANT ! - Subfolder and NO trailing slash !
    #    proxy_set_header X-Forwarded-Host $the_host/onlyofficeds;
    #    proxy_set_header X-Forwarded-Proto $the_scheme;
    #    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    #}
    # 如需支持webdav，请取消以下注释
    #location /i2sharedav {
    #    proxy_pass         http://127.0.0.1:8080;
    #    proxy_set_header   Host $http_host;
    #    proxy_set_header   X-Real-IP $remote_addr;
    #    proxy_set_header   X-Forwarded-For $proxy_add_x_forwarded_for;
    #    proxy_set_header   X-Forwarded-Host $the_host;
    #    proxy_set_header   X-Forwarded-Port $the_port;
    #    proxy_set_header   X-Forwarded-Proto $scheme;
    #    proxy_set_header   Accept-Language $lang;
    #    proxy_read_timeout  1200s;
    #    client_max_body_size 0;
    #    proxy_max_temp_file_size 0;
    #    proxy_buffering  off;
    #    access_log      /var/log/nginx/i2share.webdav.access.log;
    #    error_log       /var/log/nginx/i2share.webdav.error.log;
    #}
}