Loading...
Loading...
Once you enable CSDAC with FMC, the FMC sends hundreds of queries to the dns-server asking the a-record "muster-ui". This is really spamming alot of events The FMC constantly sends DNS A records requesting "muster UI," which is related to a component used within CSDAC. This behaviour occurs even though there is no requirement to create a "muster UI" A record in the DNS server.
This happens after enabling CSDAC in FMC.
N/A only option is to disable CSDAC
root@fmcv-beta-primary:~# tcpdump -i eth0 -n port 53 HS_PACKET_BUFFER_SIZE is set to 4. tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on eth0, link-type EN10MB (Ethernet), capture size 262144 bytes 08:35:27.541912 IP 172.24.0.4.57266 > 168.63.129.16.53: 28307+ AAAA? muster-user-analysis.po0f4wnz0wcuzcaqsllk1jrrwa.bx.internal.cloudapp.net. (90) 08:35:27.545259 IP 168.63.129.16.53 > 172.24.0.4.57266: 28307 NXDomain 0/1/0 (176) 08:35:27.546107 IP 172.24.0.4.38302 > 168.63.129.16.53: 36778+ AAAA? muster-ui-backend.po0f4wnz0wcuzcaqsllk1jrrwa.bx.internal.cloudapp.net. (87) 08:35:27.560261 IP 168.63.129.16.53 > 172.24.0.4.38302: 36778 NXDomain 0/1/0 (173) 08:35:28.498200 IP 172.24.0.4.56703 > 168.63.129.16.53: 18837+ AAAA? muster-ui. (27) 08:35:28.500394 IP 168.63.129.16.53 > 172.24.0.4.56703: 18837 NXDomain 0/1/0 (102) 08:35:28.500864 IP 172.24.0.4.53307 > 168.63.129.16.53: 12818+ AAAA? muster-ui.po0f4wnz0wcuzcaqsllk1jrrwa.bx.internal.cloudapp.net. (79) 08:35:28.505175 IP 168.63.129.16.53 > 172.24.0.4.53307: 12818 NXDomain 0/1/0 (165) 08:35:28.505773 IP 172.24.0.4.56562 > 168.63.129.16.53: 31871+ A? muster-ui. (27) 08:35:28.507992 IP 168.63.129.16.53 > 172.24.0.4.56562: 31871 NXDomain 0/1/0 (102) 08:35:28.508414 IP 172.24.0.4.51085 > 168.63.129.16.53: 30495+ A? muster- root@fmcv-beta-primary:~# nslookup > server Default server: 168.63.129.16 Address: 168.63.129.16#53 >
Cisco Integration
Learn more about where this data comes from
Bug Scrub Advisor
Streamline upgrades with automated vendor bug scrubs
BugZero Enterprise
Wish you caught this bug sooner? Get proactive today.