On 02/01/2012 12:14 AM, Shane Bywater wrote: > I'm not using iptables (well I didn't configure any) > > [root at tribe log]# iptables --line-numbers -n -L > Chain INPUT (policy ACCEPT) > num target prot opt source destination > 1 ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 state > RELATED,ESTABLISHED You should figure out who/what did, then. Those rules don't look like they were created by Red Hat's tools (where you'd see RH-Firewall...), and won't be present by default. Something created rules and the rules don't allow access to TCP or UDP 53 (you need both). For now, just flush the rules: iptables -F INPUT