Running squid 3.5.2 on Centos 6.6 ./configure --prefix=/home/cache --enable-follow-x-forwarded-for --with-large-files --enable-ssl --disable-ipv6 --enable-esi --enable-kill-parent-hack --enable-snmp --with-pthreads --with-filedescriptors=65535 --enable-cachemgr-hostname=hostname --enable-storeio=ufs,aufs,diskd,rock We have around 50 users. I am seeing hundreds of thousands of the following: 2015/03/24 14:57:34.910| SECURITY ALERT: By user agent: Mozilla/5.0 (Windows NT 6.1) AppleWebKit/536.6 (KHTML, like Gecko) Chrome/20.0.1092.0 Safari/536.6 2015/03/24 14:57:34.910| SECURITY ALERT: on URL: www.facebook.com:443 2015/03/24 14:57:34.946| SECURITY ALERT: Host header forgery detected on local=85.115.52.158:80 remote=196.245.252.34:36732 FD 49 flags=33 (local IP does not match any domain IP) Then after 2 hours, I get the message in my cacahe.log: 2015/03/24 16:41:42.478| SECURITY ALERT: By user agent: Mozilla/5.0 (Windows NT 6.1) AppleWebKit/536.6 (KHTML, like Gecko) Chrome/20.0.1092.0 Safari/536.6 2015/03/24 16:41:42.478| SECURITY ALERT: on URL: www.facebook.com:443 2015/03/24 16:41:42.478| WARNING: 1 swapin MD5 mismatches 2015/03/24 16:41:42.478| Could not parse headers from on disk object 2015/03/24 16:41:42.478| BUG 3279: HTTP reply without Date: 2015/03/24 16:41:42.478| StoreEntry->key: 23F0D6046AB8FE86440CAD447524FCBC 2015/03/24 16:41:42.478| StoreEntry->next: 0 2015/03/24 16:41:42.478| StoreEntry->mem_obj: 0x1d56470 2015/03/24 16:41:42.478| StoreEntry->timestamp: -1 2015/03/24 16:41:42.478| StoreEntry->lastref: 1427211702 2015/03/24 16:41:42.478| StoreEntry->expires: -1 2015/03/24 16:41:42.478| StoreEntry->lastmod: -1 2015/03/24 16:41:42.478| StoreEntry->swap_file_sz: 0 2015/03/24 16:41:42.478| StoreEntry->refcount: 1 2015/03/24 16:41:42.478| StoreEntry->flags: PRIVATE,FWD_HDR_WAIT,VALIDATED 2015/03/24 16:41:42.478| StoreEntry->swap_dirn: -1 2015/03/24 16:41:42.478| StoreEntry->swap_filen: -1 2015/03/24 16:41:42.478| StoreEntry->lock_count: 2 2015/03/24 16:41:42.478| StoreEntry->mem_status: 0 2015/03/24 16:41:42.478| StoreEntry->ping_status: 2 2015/03/24 16:41:42.478| StoreEntry->store_status: 1 2015/03/24 16:41:42.478| StoreEntry->swap_status: 0 2015/03/24 16:41:42.747| SECURITY ALERT: Host header forgery detected on local=85.115.52.158:80 remote=197.255.252.34:44348 FD 20 flags=33 (local IP does not match any domain IP) 2015/03/24 16:41:42.747| SECURITY ALERT: By user agent: WNetCore/0.1.1.1 2015/03/24 16:41:42.747| SECURITY ALERT: on URL: us-mg5.mail.yahoo.com:443 2015/03/24 16:41:42.772| SECURITY ALERT: Host header forgery detected on local=85.115.52.158:80 remote=197.255.252.34:44349 FD 20 flags=33 (local IP does not match any domain IP) 2015/03/24 16:41:42.772| SECURITY ALERT: By user agent: WNetCore/0.1.1.1 2015/03/24 16:41:42.772| SECURITY ALERT: on URL: csync.flickr.com:443 2015/03/24 16:41:42.800| SECURITY ALERT: Host header forgery detected on local=85.115.33.158:80 remote=197.255.252.34:13505 FD 20 flags=33 (local IP does not match any domain IP) 2015/03/24 16:41:42.800| SECURITY ALERT: By user agent: Mozilla/5.0 (Windows NT 6.1) AppleWebKit/536.6 (KHTML, like Gecko) Chrome/20.0.1092.0 Safari/536.6 2015/03/24 16:41:42.800| SECURITY ALERT: on URL: www.facebook.com:443 2015/03/24 16:41:43.115| SECURITY ALERT: Host header forgery detected on local=85.115.33.158:80 remote=197.255.252.34:13506 FD 31 flags=33 (local IP does not match any domain IP) 2015/03/24 16:41:43.115| SECURITY ALERT: By user agent: Mozilla/5.0 (Windows NT 6.1) AppleWebKit/536.6 (KHTML, like Gecko) Chrome/20.0.1092.0 Safari/536.6 2015/03/24 16:41:43.115| SECURITY ALERT: on URL: www.facebook.com:443 2015/03/24 16:41:43.115| assertion failed: store.cc:1885: "isEmpty()" Then I get a message "running out of file descriptors", for that I did the following: echo 1024 65535 > /proc/sys/net/ipv4/ip_local_port_range echo 8192 > /proc/sys/net/ipv4/tcp_max_syn_backlog In my /etc/security/limits.conf, added the following: * - nofile 65535 My squid.conf # # Recommended minimum configuration: # # Example rule allowing access from your local networks. # Adapt to list your (internal) IP networks from where browsing # should be allowed 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 localnet src fc00::/7 # RFC 4193 local private network range acl localnet src fe80::/10 # RFC 4291 link-local (directly plugged) machines acl blockeddomain dstdomain "/home/cache/etc/blocked.domain.acl" 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 acl isnsnmp snmp_community public # # Recommended minimum Access Permission configuration: # # Deny requests to certain unsafe ports http_access deny !Safe_ports # Deny CONNECT to other than secure SSL ports http_access deny CONNECT !SSL_ports # Only allow cachemgr access from localhost http_access allow localhost manager http_access deny manager cachemgr_passwd password all # We strongly recommend the following be uncommented to protect innocent # web applications running on the proxy server who think the only # one who can access services on "localhost" is a local user #http_access deny to_localhost # # INSERT YOUR OWN RULE(S) HERE TO ALLOW ACCESS FROM YOUR CLIENTS # # Example rule allowing access from your local networks. # Adapt localnet in the ACL section to list your (internal) IP networks # from where browsing should be allowed http_access deny blockeddomain http_access allow localnet http_access allow localhost snmp_access allow isnsnmp localnet # And finally deny all other access to this proxy http_access deny all # snmp_access deny all # Squid normally listens to port 3128 http_port 3128 http_port 3129 intercept snmp_port 3401 # Uncomment and adjust the following to add a disk cache directory. #cache_dir ufs /usr/local/squid/var/cache/squid 100 16 256 cache_dir aufs /home/cache/var/cache/squid 350000 16 256 # Leave coredumps in the first cache dir coredump_dir /usr/local/squid/var/cache/squid access_log daemon:/home/cache/var/logs/access.log squid cache_log /home/cache/var/logs/cache.log # # Add any of your own refresh_pattern entries above these. # refresh_pattern ^ftp: 1440 20% 10080 refresh_pattern ^gopher: 1440 0% 1440 refresh_pattern -i (/cgi-bin/|\?) 0 0% 0 refresh_pattern . 0 20% 4320 half_closed_clients off # quick_abort_min 0 KB # quick_abort_max 0 KB # vary_ignore_expire on # reload_into_ims on # memory_pools off cache_mem 9216 MB memory_cache_mode always client_persistent_connections off server_persistent_connections off visible_hostname isn-phc-cache minimum_object_size 0 KB maximum_object_size 96 MB maximum_object_size_in_memory 1 MB memory_replacement_policy lru cache_replacement_policy heap LFUDA quick_abort_min 1024 KB quick_abort_max 2048 KB quick_abort_pct 90 ipcache_size 10240 # ipcache_low 90 # ipcache_high 95 cache_swap_low 98 cache_swap_high 100 # fqdncache_size 16384 # retry_on_error on # offline_mode off logfile_rotate 10 dns_nameservers 8.8.8.8 41.78.211.30 Was the thousands of thousands of SECURITY ALERT the cause of this? Thanks Monah _______________________________________________ squid-users mailing list squid-users@xxxxxxxxxxxxxxxxxxxxx http://lists.squid-cache.org/listinfo/squid-users
