Help with iptables rule for blocking UDP port 53

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]



I would like to block all DNS queries that come from one particular ip
address.  I used TCPdump to verify that the queries were in fact,
coming from this IP:

[scarolan@server:~]$ sudo tcpdump -n udp port 53 and src 10.100.1.1
tcpdump: listening on eth0
11:12:17.162100 10.100.1.1.19233 > 10.100.1.61.domain:  14270+ A?
server.domain.com. (32) (DF)

Could someone help with the proper syntax for an IPtables rule to
block port 53 udp traffic from this IP?  I tried this rule but it
doesn't work:

-A RH-Firewall-1-INPUT -s 10.100.1.1 -m udp -p udp --dport 53 -j REJECT
_______________________________________________
CentOS mailing list
CentOS@xxxxxxxxxx
http://lists.centos.org/mailman/listinfo/centos

[Index of Archives]     [CentOS]     [CentOS Announce]     [CentOS Development]     [CentOS ARM Devel]     [CentOS Docs]     [CentOS Virtualization]     [Carrier Grade Linux]     [Linux Media]     [Asterisk]     [DCCP]     [Netdev]     [Xorg]     [Linux USB]
  Powered by Linux