Forum Discussion
igor_
Cirrus
CirrusF5 ERR_CONNECTION_RESET
Hello, We are trying to expose our backend application, which is behind a Windows IIS reverse proxy. Based on URL rewrite rules which look for host header and than route the call to the backend. Wh...
Did you take a packet capture? You should see the reason for the reset on the capture.
tcpdump -nni 0.0:nnnp -s0 host X.X.X.X and port XXXX -w/var/tmp/capture.pcap
Enabling these could help as well.- Log in to the TMOS Shell (tmsh) by entering the following command:tmsh
- To configure the BIG-IP system to log the TCP RST cause in the /var/log/ltm file, you must enable the TM.RstCause.Log database variable by entering the following command:modify /sys db tm.rstcause.log value enable
- Optional: To configure the BIG-IP system to include the RST cause information in the TCP RST packet payload, you must enable the TM.RstCause.Pkt database variable by entering the following command:modify /sys db tm.rstcause.pkt value enable
https://my.f5.com/manage/s/article/K13223
igor_Cirrus
CirrusThanks, there was an error on the network side. After fixing the app was back online.
BR,
Igor
