lusca travando apos um tempo!

Olha, agrdeço de mais esse forum, o pessoal sempre ta ajudando demais, e preciso de mais uma coisinha hoje,tenhu um servidor proxy com lusca-cache+thunder3 no slack, funcionado , mais ele dá esse erro

Código :

2011/03/17 03:59:18| clientNatLookup: NF getsockopt(SO_ORIGINAL_DST) failed: (92) Protocol not available

mesmo dando esse erro funciona so que depois de um tempo ele trava totalmente,não mais o que fazer para resolver isso,:shot:
aqui está minha squid.conf

Código :

http_port 3128 transparent
icp_port 0
cache_replacement_policy heap LFUDA
cache_dir aufs /var/cache/squid/01 20000 16 256
 
memory_replacement_policy heap GDSF
cache_mem 128 MB
maximum_object_size 256 MB
minimum_object_size 0 KB
maximum_object_size_in_memory 256 KB
cache_swap_low 90
cache_swap_high 95
ipcache_size 1024
fqdncache_size 1024
 
#
# Configuração proxy estática ------------------------------------------
#
 
#Banner do google
acl Google url_regex -i http://www.google.com.br/intl/en_com/images/srpr/logo1w.png
http_access deny Google
deny_info http://172.31.255.4/banner/google.jpg Google
 
#Banner do Orkut
acl ork.users url_regex -i ork.users
http_access deny ork.users
deny_info http://172.31.255.4/banner/orkut.jpg ork.users
 
#Banner do msn
#acl ADSAdClien url_regex -i ADSAdClien
#http_access deny ADSAdClien
#deny_info http://172.31.255.4/banner/msn.jpg ADSAdClien
 
 
ipcache_low 90
ipcache_high 95
 
#hierarchy_stoplist cgi-bin ?
acl QUERY urlpath_regex cgi-bin \?
no_cache deny QUERY
 
mime_table /etc/squid/mime.conf
pid_filename /var/run/proxy.pid
debug_options ALL,1
log_fqdn off
 
refresh_pattern ^ftp: 15 20% 2280
refresh_pattern ^gopher: 15 0% 2280
refresh_pattern . 15 20% 2280
 
acl all src 0.0.0.0/0
acl redeinterna src 172.16.0.0/12
acl manager proto cache_object
acl localhost src 127.0.0.1/255.255.255.255
acl to_localhost dst 127.0.0.0/8
acl SSL_ports port 443 563 82
acl Safe_ports port 80 # http
acl Safe_ports port 21 # ftp
acl Safe_ports port 443 563 # https, snews
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
 
#=========================================================#
# Thunder 3
#=========================================================#
acl thunder_lst url_regex -i "/etc/thunder/thunder.lst"
cache deny thunder_lst
cache_peer 172.31.255.2 parent 8080 0 proxy-only no-digest
dead_peer_timeout 2 seconds
cache_peer_access 172.31.255.2 allow thunder_lst
cache_peer_access 172.31.255.2 deny all
 
 
http_access allow manager localhost
http_access allow redeinterna
http_access deny manager
http_access deny !Safe_ports
http_access deny CONNECT !SSL_ports
 
 
cache_mgr localhost
cache_effective_user squid
cache_effective_group squid
visible_hostname localhost
 
dns_testnames registro.br
 
#acl snmppublic snmp_community public
#snmp_access allow snmppublic localhost
#snmp_access deny all
#snmp_incoming_address 0.0.0.0
#snmp_outgoing_address 255.255.255.255
 
 
# Configuraçao de LOG
cache_log none
cache_store_log none
# Sem log de acesso
#cache_access_log /var/log/squid/access.log
cache_access_log none
 
 
# Setar TOS 8 em pacotes IP de arquivos em cache
zph_mode tos
zph_local 0x08
zph_parent 0
zph_option 136
visible_hostname localhost
cache_mgr localhost
mime_table /etc/squid/mime.conf
pid_filename /var/run/proxy.pid
cache_effective_user squid
cache_effective_group squid

Desde já agradeço a todos !!:rock: