Get source and destination of outbound traffic in pfSense

Posted by maxsilver on Server Fault See other posts from Server Fault or by maxsilver
Published on 2010-04-20T22:28:45Z Indexed on 2010/04/20 22:33 UTC
Read the original article Hit count: 335

Filed under:

pfsense

I'm looking at the traffic graph in pfSense (Version 1.2.2), which we're using as a router / NAT / ect on our network. Recently, I'm seeing a sudden, constant spike of 15 - 30kbps traffic outbound, that is unusual for our network (normally its below 2kbps, we're mostly all inbound traffic)

Is there any way to determine what the source of this traffic is, or where it's going? (Just an internal IP address for source, and external IP address for destination would be all I need)

I've already tried switching the traffic graph to 'LAN' and watching the host list on the right side, but it seems ... flakey. The numbers it shows seem to fade in and out at random, and the values never add up to anywhere near the graph values.

I'm not allowed to post the image, but a photo is available at -> http://imgur.com/QYjKI.png

Related posts about pfsense

Using pfSense, OpenVPN Connects but Still Can't See the Network

as seen on Super User - Search for 'Super User'
I am having an OpenVPN issue. I have a pfSense box at home configured to allow traffic through a VPN tunnel. The client computer is Windows XP Home, behind a standard Comcast connection and a Netgear wireless router. I use OpenVPN to access my work network (from where I am trying to get out of… >>> More
Ierrs on Network Interface - Pfsense/Freebsd

as seen on Server Fault - Search for 'Server Fault'
Hello all, We're using PfSense as an internal router/firewall (no connection to WAN). Using the Web-GUI, under Status --- Interfaces, there's one particular interface where I have some errors: In/out errors 3513/0 I then SSHed to the firewall to validate the info provided by the WebGUI and… >>> More
pfSense Firewall or Linsys/Cisco router for small offices

as seen on Server Fault - Search for 'Server Fault'
I'm about to start switching some networks around for multiple small offices. Each office has about 10 to 15 users and 10 to 15 computers. Each office has a spread of generic routers and access points. The routers vary from being used as routers, to just being an access point for wireless. Nothing… >>> More
Per client DNS server assignment using Pfsense

as seen on Server Fault - Search for 'Server Fault'
I have a network where pfsense is the gateway. There are two sets of clients that I want. One where there will be some restrictions to the network (example, IM being blocked) and one network where there are no restrictions. One easy way I thought about doing this was assigning the different domains… >>> More
Route specific HTTP requests through pfSense OpenVPN

as seen on Server Fault - Search for 'Server Fault'
Hi, to start, I have very little knowledge on routes, iptables, etc. That said, here's what I'm trying to accomplish and where I think I'm stumped: Problem: We have an external website which we recently firewalled so it only accepts traffic from our office IP addresses. This works well at the office… >>> More

Developer IT