Hi, I am trying to configure snmp with.When i try to run snmpwalk command for testing , i am getting erros in cache.log. cache.log 2011/10/24 00:30:48| snmp_core.cc(489) snmpDecodePacket: Failed SNMP agent query from : 210.122.22.30:53441 2011/10/24 00:30:49| snmp_core.cc(489) snmpDecodePacket: Failed SNMP agent query from : 210.122.22.30:53441 2011/10/24 00:30:50| snmp_core.cc(489) snmpDecodePacket: Failed SNMP agent query from : 210.122.22.30:53441 2011/10/24 00:30:51| snmp_core.cc(489) snmpDecodePacket: Failed SNMP agent query from : 210.122.22.30:53441 2011/10/24 00:30:52| snmp_core.cc(489) snmpDecodePacket: Failed SNMP agent query from : 210.122.22.30:53441 2011/10/24 00:30:53| snmp_core.cc(489) snmpDecodePacket: Failed SNMP agent query from : 210.122.22.30:53441 snmpwalk -m /usr/share/snmp/mibs/SQUID-MIB.txt -v1 -c public localhost:3401 .1.3.6.1.4.1.3495.1.1 Timeout: No Response from localhost:3401 my squid.conf # # Recommended minimum configuration: # acl manager proto cache_object acl localhost src 127.0.0.1/32 ::1 acl to_localhost dst 127.0.0.0/8 0.0.0.0/32 ::1 # 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 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 mynetwork src '/etc/squid/mynetwork' # # Recommended minimum Access Permission configuration: # # Only allow cachemgr access from localhost http_access allow manager localhost http_access deny manager # 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 # 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 allow mynetwork http_access allow localhost # And finally deny all other access to this proxy http_access deny all # Squid normally listens to port 3128 http_port 3128 http_port 3129 intercept # We recommend you to use at least the following line. hierarchy_stoplist cgi-bin ? # Uncomment and adjust the following to add a disk cache directory. cache_dir aufs /CACHE 307200 64 512 # Leave coredumps in the first cache dir coredump_dir /CACHE # 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 cache_mem 2000 MB httpd_suppress_version_string on visible_hostname CACHE_ENGINE error_directory /etc/squid/errors via off maximum_object_size_in_memory 40 KB maximum_object_size 65536 KB cache_swap_low 96 cache_swap_high 97 memory_replacement_policy lru cache_replacement_policy heap LFUDA quick_abort_min 1024 KB quick_abort_max 2045 KB quick_abort_pct 90 positive_dns_ttl 8 hours negative_dns_ttl 0 ipcache_size 20000 ipcache_low 95 ipcache_high 97 fqdncache_size 12000 cache_store_log /var/log/squid/store.log pipeline_prefetch on snmp_port 3401 acl snmppublic snmp_community public snmp_access allow snmppublic localhost snmp_access deny all snmp_incoming_address 0.0.0.0 snmp_outgoing_address 0.0.0.0 where could be the mistake? squid version: 3.1.8 centos 6 64 bit kernel: 2.6.32-71.el6.x86_64 while i try to run : snmpwalk -v1 -c public localhost , it is working fine. Regards, Benjamin Fernandis