Getting Data In

Splunk Connect For Syslog - no data indexed

corti77
Communicator

Hi,

I followed the official instructions and deployed syslog connect in Ubuntu using docker.
https://splunk.github.io/splunk-connect-for-syslog/1266/gettingstarted/docker-systemd-general/

after I run 

 

sudo systemctl start sc4s

 

and, according to the documentation, I see the correct event appearing in Splunk. so the connectivity to splunk is correct.

then I wanted to start logging from our Citrix NetScaler appliance. I followed the instructions from
https://splunk.github.io/splunk-connect-for-syslog/1266/sources/Citrix/
and created the index netfw in Splunk.

I modified the file splunk_metadata.csv with the two lines

 

citrix_netscaler,index,netfw
citrix_netscaler,sourcetype,citrix:netscaler:syslog

 

I was not sure if it was needed but I restarted the container to read the new configuration file.

 

systemctl restart sc4s

 

But I checked in Splunk and no data is coming in that index (0 events)

I checked the local FW in the Ubuntu and it is disabled. In fact I run tcpdump and I see syslog packages coming from the netscaler appliance.

 

:/opt/sc4s/local/context$ sudo tcpdump -nnSX port 514
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 262144 bytes
17:11:29.533661 IP 192.168.115.159.54092 > 192.168.105.202.514: SYSLOG local5.info, length: 270
        0x0000:  4500 012a bdc7 0000 ff11 9e40 c0a8 739f  E..*.......@..s.
        0x0010:  c0a8 69ca d34c 0202 0116 9c65 3c31 3734  ..i..L.....e<174
        0x0020:  3e20 3232 2f30 392f 3230 3231 3a31 353a  >.22/09/2021:15:
        0x0030:  3131 3a32 3920 474d 5420 4154 4c48 514d  11:29.GMT.ATLHQM
        0x0040:  564d 534c 4232 2030 2d50 5045 2d30 203a  VMSLB2.0-PPE-0.:
        0x0050:  2064 6566 6175 6c74 2054 4350 2043 4f4e  .default.TCP.CON
        0x0060:  4e5f 5445 524d 494e 4154 4520 3435 3635  N_TERMINATE.4565
        0x0070:  3733 3920 3020 3a20 2053 6f75 7263 6520  739.0.:..Source.
        0x0080:  3139 322e 3136 382e 3130 352e 3535 3a34  192.168.105.55:4
        0x0090:  3433 202d 2044 6573 7469 6e61 7469 6f6e  43.-.Destination
        0x00a0:  2031 3932 2e31 3638 2e31 3035 2e31 3630  .192.168.105.160
        0x00b0:  3a34 3238 3737 202d 2053 7461 7274 2054  :42877.-.Start.T
        0x00c0:  696d 6520 3232 2f30 392f 3230 3231 3a31  ime.22/09/2021:1
        0x00d0:  353a 3131 3a32 3920 474d 5420 2d20 456e  5:11:29.GMT.-.En
        0x00e0:  6420 5469 6d65 2032 322f 3039 2f32 3032  d.Time.22/09/202
        0x00f0:  313a 3135 3a31 313a 3239 2047 4d54 202d  1:15:11:29.GMT.-
        0x0100:  2054 6f74 616c 5f62 7974 6573 5f73 656e  .Total_bytes_sen
        0x0110:  6420 3020 2d20 546f 7461 6c5f 6279 7465  d.0.-.Total_byte
        0x0120:  735f 7265 6376 2031 200a                 s_recv.1..
17:11:29.689892 IP 192.168.115.159.54092 > 192.168.105.202.514: SYSLOG local5.info, length: 271
        0x0000:  4500 012b bdc8 0000 ff11 9e3e c0a8 739f  E..+.......>..s.
        0x0010:  c0a8 69ca d34c 0202 0117 6078 3c31 3734  ..i..L....`x<174
        0x0020:  3e20 3232 2f30 392f 3230 3231 3a31 353a  >.22/09/2021:15:
        0x0030:  3131 3a32 3920 474d 5420 4154 4c48 514d  11:29.GMT.ATLHQM
        0x0040:  564d 534c 4232 2030 2d50 5045 2d30 203a  VMSLB2.0-PPE-0.:
        0x0050:  2064 6566 6175 6c74 2054 4350 2043 4f4e  .default.TCP.CON

 

 

could someone point to me what I am missing?

Thanks a lot in advance.

 

Labels (2)
0 Karma
1 Solution

corti77
Communicator

Problem solved. The issue was located in the Splunk HEC configuration. the token I configured in syslog connector did not have access to the index netfw. 
I managed to find the issue after I found drop messages in the main index, default index in that HEC token.

View solution in original post

corti77
Communicator

Problem solved. The issue was located in the Splunk HEC configuration. the token I configured in syslog connector did not have access to the index netfw. 
I managed to find the issue after I found drop messages in the main index, default index in that HEC token.

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