![]() Test if this work, start Wireshark capture, open a command window, ping a non exist website, like ping Then stop the capture, apply the expression in the display filter, see if the unsuccessful query been listed and only that is listed. !(=0) means the reply code does not match "no error" - =1 means match all the query answer packet. To do this, you may use this Wireshark filter. One of the most useful display filters is: ip.src IP-address and ip. After you’ve stopped the packet capture, use display filters to narrow down the packets in the Packet List to troubleshoot your issue. RCODE Name Description Reference 0 NoError No Error 1 FormErr Format Error 2 ServFail Server Failure 3 NXDomain Non-Existent Domain 4 NotImp Not Implemented 5 Refused Query Refused 6 YXDomain Name Exists when it should not 7 YXRRSet RR Set Exists when it should not 8 NXRRSet RR Set that should exist does not 9 NotAuth Server Not Authoritative for zone 9 NotAuth Not Authorized 10 NotZone Name not contained in zone 11-15 Unassignedġ6 BADVERS Bad OPT Version 16 BADSIG TSIG Signature Failure 17 BADKEY Key not recognized 18 BADTIME Signature out of time window 19 BADMODE Bad TKEY Mode 20 BADNAME Duplicate key name 21 BADALG Algorithm not supported 22 BADTRUNC Bad Truncation 23 BADCOOKIE Bad/missing Server Cookie 24-3840 Unassignedģ841-4095 Reserved for Private Use 4096-65534 UnassignedĦ5535 Reserved, can be allocated by Standards Action Sometimes you may want to filter your capture to only show DNS queries for which there was no response. Wireshark display filters Wireshark display filters change the view of the capture during analysis. ![]() ![]() Supplement to Computer Networking: A - Studocu Nahi de rha wireshark lab: dns v8.0 supplement to computer networking: approach, 8th ed., kurose and ross me and forget. ![]() Browse to Domain Name System > Flags, last line is the reply code, the 0 of which means no error. Wireshark DNS v8 - Nahi de rha - Wireshark Lab: DNS v8. ![]()
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