Other way is capture all the traffic came through your interface and then sort it by traffic size and this way is more proper to un-managed network. so you easily can monitor the traffic destine to ff:ff:ff:ff:ff:ff or 192.168.0.255 Long time ago, and zeroes are no longer used in the wildcard section The broadcast IP address in the early days were 0.0.0.0, but was a Netmask is 255.255.255.0), that address is also a broadcast address.
If the host portion of an IPĪddress is all ones (e.g. Broadcast addresses are usually used byĪRP, DHCP, and other protocols that do some sort of discovery.Īll-ones address (ff:ff:ff:ff:ff:ff) for broadcast traffic this isĪddress (255.255.255.255) is broadcast. Īny way if you decided to use any of them you must get this before.Īny packet destined for all stations on a network segment isĬonsidered broadcast traffic.
the second is to configure you active device (the switch ) to spin copy of traffic to the port where you are connected to then try to monitor via wireshark. the first is to monitor your PC interface itself which may be not efficient cause you may suffer from any malware attack cause your interface to be congested. If you need to monitor broadcast, there will be two ways. it can be your interface or any active device interface (switch for example) How should I fix this? It seems my DNS is totally broken. And if that's not bad enough, I've had to reset my router twice in last week (OpenWRT) because sometimes DNS would break altogether, and Wireshark would show that my local domain, ".lann" was being added to every single query the system made, for example: Is this normal? Is dnsmasq interfering with DNSCrypt-proxy? I tried running dnscrypt without a dns cache, but than I noticed that queries to my localhost and sometimes local network were being forwarded to the nameservers. It even happens for broadcast addresses: 125 37.371037000 localhost localhost DNS 90 Standard query 0x8e53 PTR Įverytime this happens, the queries are followed by a bunch of 'conntecion resets' and other warnings. 13.0.8.10.in-addr.arpa.13.0.8.10.in-addr.arpa.Īnd let's say my VPN server IP is 123.456.78.91, than the queries look like this: 9143 584.912799000 localhost localhost DNS 88 Standard query 0xc198 PTR 19.78.Īnd of course, the answer to these queries are always this: 9144 584.912945000 localhost localhost DNS 88 Standard query response 0xc198 No such name Firstly, after disconnecting from my VPN, with the hypothetical IP address of 10.8.0.13, I see this. When running a dumcap via Wireshark, I've noticed a couple of odd occurrences lately. I have been using DNSCrypt with dnsmasq on my Ubuntu 14.10 machine.
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