странности со скоростью интернет

acl all src 0.0.0.0/0.0.0.0
acl usr src 192.168.1.2-192.168.1.49
acl manager proto cache_object
acl localhost src 127.0.0.1/32
acl SSL_ports port 443          # https
acl SSL_ports port 563          # snews
acl SSL_ports port 873          # rsync
acl SSL_ports port 5222         # jabber0
acl SSL_ports port 5223         # jabber1
acl Safe_ports port 80          # http
acl Safe_ports port 21          # ftp
acl Safe_ports port 443         # https
acl Safe_ports port 123         # NTP
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 Safe_ports port 631         # cups
acl Safe_ports port 873         # rsync
acl Safe_ports port 901         # SWAT
acl purge method PURGE
acl CONNECT method CONNECT
http_access allow manager localhost
http_access deny manager
http_access allow purge localhost
http_access deny purge
http_access deny CONNECT !SSL_ports
http_access deny !Safe_ports
http_access allow usr
http_access deny usr
http_access deny all
http_port 8085 transparent
icp_port 0
hierarchy_stoplist cgi-bin ?
access_log /SQUID/log/access.log squid
logfile_rotate 4
refresh_pattern ^ftp:           1440    20%     10080
refresh_pattern ^gopher:        1440    0%      1440
refresh_pattern -i (/cgi-bin/|\?) 0     0%      0
refresh_pattern (Release|Package(.gz)*)$        0       20%     2880
refresh_pattern .               0       20%     4320
acl shoutcast rep_header X-HTTP09-First-Line ^ICY.[0-9]
upgrade_http0.9 deny shoutcast
acl apache rep_header Server ^Apache
broken_vary_encoding allow apache
extension_methods REPORT MERGE MKACTIVITY CHECKOUT
hosts_file /etc/hosts
coredump_dir /SQUID
cache_mem 64 MB
maximum_object_size 4096 KB
maximum_object_size_in_memory 512 KB
cache_dir ufs /SQUID/cache 4096 16 256
cache_log /SQUID/log/cache.log
cache_store_log /SQUID/log/store.log
pid_filename /SQUID/log/squid.pid
cache_effective_user proxy
cache_effective_group proxy

# Generated by iptables-save v1.4.4 on Tue May 31 16:21:55 2011
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [5:4556]
:OUTPUT ACCEPT [0:0]
-A INPUT -i eth0 -j ACCEPT
-A INPUT -i eth1 -p udp -j ACCEPT
-A INPUT -i eth1 -p tcp -j ACCEPT
-A FORWARD -j ACCEPT
-A OUTPUT -j ACCEPT
COMMIT
# Completed on Tue May 31 16:21:55 2011
# Generated by iptables-save v1.4.4 on Tue May 31 16:21:55 2011
*mangle
:PREROUTING ACCEPT [414:389052]
:INPUT ACCEPT [26:1820]
:FORWARD ACCEPT [388:387232]
:OUTPUT ACCEPT [21:9869]
:POSTROUTING ACCEPT [409:397101]
COMMIT
# Completed on Tue May 31 16:21:55 2011
# Generated by iptables-save v1.4.4 on Tue May 31 16:21:55 2011
*nat
:PREROUTING ACCEPT [0:0]
:POSTROUTING ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
-A PREROUTING ! -d 192.168.1.0/24 -p tcp -m multiport --dports 80,443 -j REDIRECT --to-ports 8085 
COMMIT
# Completed on Tue May 31 16:21:55 2011

...
-A POSTROUTING -s 192.168.1.0/24 ! -d 192.168.1.0/24 -p udp -j SNAT --to-source 192.168.50.254 
-A POSTROUTING -s 192.168.1.0/24 ! -d 192.168.1.0/24 -p tcp -j SNAT --to-source 192.168.50.254
...