Hi: I set up a ftp proxy with squid-3.1.4 but there is a promble I can't figure out why . when I first connect to a ftp server , it works fine , but if I disconnected and reconnect immediately , it hang up , then timeout.... sorry for my poor english , anyone knows why? my squid.conf: acl all src all acl manager proto cache_object acl FTP proto FTP acl localhost src 127.0.0.1/32 acl to_localhost dst 127.0.0.0/8 0.0.0.0/32 acl localnet src 10.0.0.0/8 # RFC1918 possible internal network acl localnet src 172.16.0.0/12 # RFC1918 possible internal network acl localnet src 192.168.0.0/16 # RFC1918 possible internal network acl SSL_ports port 443 acl Safe_ports port 80 # http acl Safe_ports port 21 # ftp acl Safe_ports port 443 # https acl Safe_ports port 70 # gopher acl Safe_ports port 210 # wais acl Safe_ports port 1025-65535 # unregistered ports acl Safe_ports port 280 # http-mgmt acl Safe_ports port 488 # gss-http acl Safe_ports port 591 # filemaker acl Safe_ports port 777 # multiling http acl CONNECT method CONNECT http_access allow manager localhost http_access deny manager http_access deny !Safe_ports http_access allow FTP http_access allow localnet http_access deny all icp_access allow all http_port 8337 hierarchy_stoplist cgi-bin ? access_log /home/huixc/local/squid/var/logs/access.log squid debug_options ALL, 1 ftp_passive on ftp_epsv_all on refresh_pattern ^ftp: 0 0% 0 refresh_pattern ^gopher: 1440 0% 1440 refresh_pattern -i (/cgi-bin/|\?) 0 0% 0 refresh_pattern . 0 20% 4320 forward_timeout 4 minutes connect_timeout 1 minute peer_connect_timeout 30 seconds read_timeout 5 minutes request_timeout 1 minute persistent_request_timeout 1 minute client_lifetime 1 day half_closed_clients on pconn_timeout 10 seconds ident_timeout 10 seconds shutdown_lifetime 30 seconds forwarded_for on coredump_dir /home/huixc/local/squid/var/cache useragent_log /home/huixc/local/squid/var/logs/useragent.log cache_mem 0 no_cache deny FTP hosts_file /etc/hosts