Show only SMTP (port 25) and ICMP traffic: tcp.port eq 25 or icmpġ1. Display http response code of 200 in network traffic = 200ġ0. Show traffic which contains google tcp contains googleħ. display all protocols other than arp, icmp and dns !(arp or icmp or dns)Ħ. Display traffic with source or destination port as 443 tcp.port = 443ĥ. Display tcp and dns packets both tcp or dnsģ. In this research, packet filtering methods based on DSCP code applied to the Netfilter system are used to do prevention of DHCP Starvation attacks, this method has proven to be very effective in making prevention and more efficient when applied on small scale wireless networks such as at office networks and internet cafe.1. Various methods such as authentication, cryptography, and machine learning are used by researchers in preventing DHCP Starvation attacks, but the issue of effectiveness and efficiency still opens up further research opportunities.

But it turns out that there is a security threat to DHCP service, namely DHCP Starvation attacks that can be exhausting the availability of IP addresses in DHCP service so that the configuration of IP address automatically can no longer be done on the client.

For easy access to the network, DHCP service become a standard feature that must exist, because ordinary users no longer need to think about procedures for configuring IP addresses, all of which have been done automatically by the DHCP service.

The use of the internet today has become a necessity, the most commonly used media to connect to the internet is a Wireless LAN network.

Wireshark filter for ip