For this post, our lab will consist of a single instance running Snort and a single instance running an Elastic Stack, both running on Ubuntu Server 20.04. This approach is effective on a small scale, but as the number of systems grows managing Snort configurations across them can get cumbersome without dedicated automation. Our approach with Snort and Elastic differs slightly in that the heavy lifting of the traffic analysis occurs on the interface of each instance before shipping off to Elastic. Once the traffic reaches the Zeek instance interface, it can be analyzed for malicious indicators such as Command and Control (C2) traffic or network enumeration. The last lab design we looked at for network monitoring forwarded traffic from several EC2 instances to a single interface on our Zeek host. If following along and deploying resources, be sure to terminate the above resources when finished with the lab to avoid unexpected costs.
![configure snort x forwarded for configure snort x forwarded for](https://docs.netgate.com/pfsense/en/latest/_images/snortupdaterulesstatus2.png)
The lab we’ll be creating in this post has several AWS resources which cost money to run.
CONFIGURE SNORT X FORWARDED FOR HOW TO
We’ve already covered how to implement VPC Traffic Mirroring and Zeek, and in this post we’ll walk through setting up the Snort IDS and Elastic Stack to identify potentially malicious network activity in a lab. Two specific scenarios, outlined in this post, make use of native AWS functionality along with popular open-source network traffic analysis tools to provide insight into network traffic in our lab environments. # "forward" deployment the first IP address is used.Our customers often ask for detailed logging and monitoring capabilities in their lab environments, and we’ve implemented a number of unique scenarios to enable those requests. # a "reverse" deployment the IP address used is the last one, in a # Two proxy deployments are supported, "reverse" and "forward". # Two operation modes are available, "extra-data" and "overwrite". # helpful when reviewing alerts for traffic that is being reverse # with the one reported in the X-Forwarded-For HTTP header. # the source or destination IP address (depending on flow direction) # HTTP X-Forwarded-For support by adding an extra field or overwriting Http: yes # enable dumping of http fields Packet: yes # enable dumping of packet (without stream segments) Payload-printable: yes # enable dumping payload in printable (lossy) format Payload: yes # enable dumping payload in Base64 #level: Info # possible levels: Emergency, Alert, Critical, # the following are valid when type: syslog above The additional fields can be enabled as following:"įiletype: regular #regular|syslog|unix_dgram|unix_stream "In addition to the extended logging fields one can also choose to enable/add from 47 additional custom logging HTTP fields enabled in the suricata.yaml file. In the next version Bill could add oftions in the GUI for: HTTP Extended Custom, Payload, Packet, Payload Printable for the eve-loggingĪlso outputing the eve-log into a Logstash, Kibana gives you alot of visibility about the alerts. You can already choose in the interface setting page some EVE logging info like Alerts, TLS hanshakes, HTTP traffic, Tracked Files, DNS Requests/Replies, SSH hanshakes. Not sure its supported with the current freebsd version 2.0.9, but with the next one 2.1 and later, it works like a charm. yaml of the interface, you can add the http extended custom options. The extended logging in Suricata is done with the EVE.json.
CONFIGURE SNORT X FORWARDED FOR FULL
http.log shows more information about the http request, but does not show the credentials.Īm I missing something with Suricata? Is there a way to capture more info for investigation purposes?Įdit: just looked more closely and I think I need to Enable Packet Log in the Suricata settings for the interface, but does this do full packet capture? or only pcaps for alerts? Is there anyway to setup Suricata to log pcaps for alerts only like Snort does by default?
![configure snort x forwarded for configure snort x forwarded for](https://blog.itpro.tv/wp-content/uploads/2020/01/Picture8.png)
With Suricata the alerts.log shows the alert, similar to the tab in the web gui.
![configure snort x forwarded for configure snort x forwarded for](https://ars.els-cdn.com/content/image/3-s2.0-B9781931836746500075-u02-06a-9781931836746.gif)
With Snort I would have been able to to see this in the pcap. I end up with a alerts.log and http.log, but neither of which contains the level of detail that the pcaps in Snort have.įor instance I got an alert about HTTP basic auth unencrypted and wanted to see the credentials. I recently started playing with Suricata and am finding the level of logging to be lacking. There often isn't enough info in the alert name, IPs and ports to know what is going on, but the PCAP can help to determine if something needs further investigation or can be ignored. I've been running Snort on my pfSense for a while and really like the way that it logs a pcap for each alert.