Block DNS traffic except for 1 device
Good evening all. I want to block outbound DNS traffic from all of my devices except the pihole (192.168.2.196).
Im thinking the following iptables rules should work but I'm inexperienced with iptables so I'm hoping someone can help me before I try it and make my wife mad because the internet doesn't work anymore.
iptables -A OUTBOUND -p UDP -s 192.168.2.196 --dport 53 -j ACCEPT
iptables -A OUTBOUND -p TCP -s 192.168.2.196 --dport 53 -j ACCEPT
iptables -A OUTBOUND -s 192.168.2.1/24 --dport 53 -j DROP
Additionally some of the devices like Google home are hard coded to use 8.8.8.8 as their DNS so I was thinking something like this to redirect them to the pihole?
iptables -A OUTBOUND -d 8.8.8.8/32 -p tcp -m tcp --dport 53 -j DNAT --to-destination 192.168.2.196
iptables -A OUTBOUND -d 8.8.8.8/32 -p udp -m udp --dport 53 -j DNAT --to-destination 192.168.2.196
iptables -A OUTBOUND -d 8.8.4.4/32 -p udp -m udp --dport 53 -j DNAT --to-destination 192.168.2.196
iptables -A OUTBOUND -d 8.8.4.4/32 -p tcp -m tcp --dport 53 -j DNAT --to-destination 192.168.2.196
Does anyone see any of these issues with these?
iptables
asked 4 mins ago
Dan.TDan.T
1
add a comment |
Good evening all. I want to block outbound DNS traffic from all of my devices except the pihole (192.168.2.196).
Im thinking the following iptables rules should work but I'm inexperienced with iptables so I'm hoping someone can help me before I try it and make my wife mad because the internet doesn't work anymore.
iptables -A OUTBOUND -p UDP -s 192.168.2.196 --dport 53 -j ACCEPT
iptables -A OUTBOUND -p TCP -s 192.168.2.196 --dport 53 -j ACCEPT
iptables -A OUTBOUND -s 192.168.2.1/24 --dport 53 -j DROP
Additionally some of the devices like Google home are hard coded to use 8.8.8.8 as their DNS so I was thinking something like this to redirect them to the pihole?
iptables -A OUTBOUND -d 8.8.8.8/32 -p tcp -m tcp --dport 53 -j DNAT --to-destination 192.168.2.196
iptables -A OUTBOUND -d 8.8.8.8/32 -p udp -m udp --dport 53 -j DNAT --to-destination 192.168.2.196
iptables -A OUTBOUND -d 8.8.4.4/32 -p udp -m udp --dport 53 -j DNAT --to-destination 192.168.2.196
iptables -A OUTBOUND -d 8.8.4.4/32 -p tcp -m tcp --dport 53 -j DNAT --to-destination 192.168.2.196
Does anyone see any of these issues with these?
iptables
asked 4 mins ago
Dan.TDan.T
1
add a comment |
Good evening all. I want to block outbound DNS traffic from all of my devices except the pihole (192.168.2.196).
Im thinking the following iptables rules should work but I'm inexperienced with iptables so I'm hoping someone can help me before I try it and make my wife mad because the internet doesn't work anymore.
iptables -A OUTBOUND -p UDP -s 192.168.2.196 --dport 53 -j ACCEPT
iptables -A OUTBOUND -p TCP -s 192.168.2.196 --dport 53 -j ACCEPT
iptables -A OUTBOUND -s 192.168.2.1/24 --dport 53 -j DROP
Additionally some of the devices like Google home are hard coded to use 8.8.8.8 as their DNS so I was thinking something like this to redirect them to the pihole?
iptables -A OUTBOUND -d 8.8.8.8/32 -p tcp -m tcp --dport 53 -j DNAT --to-destination 192.168.2.196
iptables -A OUTBOUND -d 8.8.8.8/32 -p udp -m udp --dport 53 -j DNAT --to-destination 192.168.2.196
iptables -A OUTBOUND -d 8.8.4.4/32 -p udp -m udp --dport 53 -j DNAT --to-destination 192.168.2.196
iptables -A OUTBOUND -d 8.8.4.4/32 -p tcp -m tcp --dport 53 -j DNAT --to-destination 192.168.2.196
Does anyone see any of these issues with these?
iptables
asked 4 mins ago
Dan.TDan.T
1
Good evening all. I want to block outbound DNS traffic from all of my devices except the pihole (192.168.2.196).
Im thinking the following iptables rules should work but I'm inexperienced with iptables so I'm hoping someone can help me before I try it and make my wife mad because the internet doesn't work anymore.
iptables -A OUTBOUND -p UDP -s 192.168.2.196 --dport 53 -j ACCEPT
iptables -A OUTBOUND -p TCP -s 192.168.2.196 --dport 53 -j ACCEPT
iptables -A OUTBOUND -s 192.168.2.1/24 --dport 53 -j DROP
Additionally some of the devices like Google home are hard coded to use 8.8.8.8 as their DNS so I was thinking something like this to redirect them to the pihole?
iptables -A OUTBOUND -d 8.8.8.8/32 -p tcp -m tcp --dport 53 -j DNAT --to-destination 192.168.2.196
iptables -A OUTBOUND -d 8.8.8.8/32 -p udp -m udp --dport 53 -j DNAT --to-destination 192.168.2.196
iptables -A OUTBOUND -d 8.8.4.4/32 -p udp -m udp --dport 53 -j DNAT --to-destination 192.168.2.196
iptables -A OUTBOUND -d 8.8.4.4/32 -p tcp -m tcp --dport 53 -j DNAT --to-destination 192.168.2.196
Does anyone see any of these issues with these?
iptables
iptables
asked 4 mins ago
Dan.TDan.T
1
asked 4 mins ago
Dan.TDan.T
1
asked 4 mins ago
Dan.TDan.T
1
asked 4 mins ago
Dan.TDan.T
1
asked 4 mins ago
Dan.TDan.T
1
1
add a comment |
add a comment |
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