Hi , Everyone :: I need your help i can't successful about SQUID + MRTG . Anyone Can help me ? i got error in /var/log/squid/cache.log like this. ############# commBind: Cannot bind socket FD 13 to *:3401: (13) Permission denied FATAL: Cannot open snmp Port ############# When i config /etc/squid/squid.conf ############# snmp_port 3401 acl snmppublic snmp_community public snmp_access allow snmppublic all snmp_access deny all snmp_incoming_address 0.0.0.0 snmp_outgoing_address 255.255.255.0 ############# Thank you very much for advance Regards., Pratchaya PS. my netstat -tanp by default ( when i comment this line "#snmp_port 3401" and start squid ) [root@berlin selinux]# netstat -tanp Active Internet connections (servers and established) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 0.0.0.0:199 0.0.0.0:* LISTEN 2763/snmpd tcp 0 0 0.0.0.0:3306 0.0.0.0:* LISTEN 11124/mysqld tcp 0 0 0.0.0.0:21 0.0.0.0:* LISTEN 2798/vsftpd tcp 0 0 192.168.1.2:53 0.0.0.0:* LISTEN 2653/named tcp 0 0 192.168.2.1:53 0.0.0.0:* LISTEN 2653/named tcp 0 0 127.0.0.1:53 0.0.0.0:* LISTEN 2653/named tcp 0 0 0.0.0.0:3128 0.0.0.0:* LISTEN 5202/(squid) tcp 0 0 0.0.0.0:25 0.0.0.0:* LISTEN 2982/master tcp 0 0 127.0.0.1:953 0.0.0.0:* LISTEN 2653/named tcp 0 0 :::110 :::* LISTEN 2919/dovecot tcp 0 0 :::143 :::* LISTEN 2919/dovecot tcp 0 0 :::80 :::* LISTEN 3005/httpd tcp 0 0 :::22 :::* LISTEN 2773/sshd tcp 0 0 :::443 :::* LISTEN 3005/httpd [root@berlin selinux]#