Hi All, I am a wireshark beginner. I am trying to troubleshoot my home network problem. I ping the gateway bypass my router and get back the ICMP response. But I don't know why there are some ICMP responses which are from other destinations instead of gateway. Is it possible to make impact in my router(LAN network) ? I sort the packet capture by protocol. my ip 18.104.22.168
asked 26 Sep '17, 08:52
edited 26 Sep '17, 09:13
I assume your IP is 22.214.171.124, so it's telling other IP addresses that some ports they try to access on your IP aren't available (the black packets). If you look inside the black packets you'll find quoted packets at the bottom of each packet, telling you what the packet causing the "Port unreachable" message was.
BTW: in general, it makes no sense to sort the packet list by protocol, because it makes it very hard to see context of the conversation. I recommend filtering on IP pairs instead if you want to limit what you're showing.
answered 26 Sep '17, 09:00