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Bandwidth Usage

rsenio

I'm super confused about an issue I'm having. The last few weeks I've had a PC on my network at the top of the list in terms of bandwidth usage. Heads and tails above the rest.

 

For example, today...only an hour and a half into the work day they're at 14.8 GB when I view the Network Usage - Bandwidth Usage report.

 

Viewing the details of this PC shows

1
HTTP-ALT
TCP
13.2 GB
99.29
1.5 GB
99.96
14.7 GB
99.35
4 692 271
100.00
2
HTTP
TCP
71.5 MB
0.52
429.3 kB
0.03
71.9 MB
0.48
19
0.00
3
HTTPS
TCP
25.6 MB
0.19
220.6 kB
0.01
25.8 MB
0.17
65
0.00

Yet when I look at the web report Top user by Traffic for today I'm only seeing this user at 144MB.

So how can I tell what is happening on this PC, for http-alt 8080? Something causing a large amount of traffic to the UTM on port 8080 from this PC? 

I'm confused



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  • 0

    Does the web browser in that PC have the UTM defined as an explicit Proxy?  Is the Web Filtering log full of rejections of surf attempts by that PC?

    Cheers - Bob

     
    Sophos UTM Community Moderator
    Sophos Certified Architect - UTM
    Sophos Certified Engineer - XG
    Gold Solution Partner since 2005
    MediaSoft, Inc. USA
  • 0 in reply to BAlfson

    Yep, this is controlled by group policy. And the web filtering log isn't abnormal compared to other PC's on the network. The odd block from visiting a site that has content from Facebook etc. Funny thing is that the PC was at the top of the usage list, higher than the actual WAN IP...which is normally at the top.

  • 0 in reply to rsenio

    It's probably time to put a packet capture on that traffic from the UTM to the PC.  It almost seems like there's something that the UTM keeps trying to send something to the PC, but something at the PC isn't accepting it fast enough.  What happens if you do a proxy restart?

    /var/mdw/scripts/httpproxy restart

    Cheers - Bob

     
    Sophos UTM Community Moderator
    Sophos Certified Architect - UTM
    Sophos Certified Engineer - XG
    Gold Solution Partner since 2005
    MediaSoft, Inc. USA
Reply
  • 0 in reply to rsenio

    It's probably time to put a packet capture on that traffic from the UTM to the PC.  It almost seems like there's something that the UTM keeps trying to send something to the PC, but something at the PC isn't accepting it fast enough.  What happens if you do a proxy restart?

    /var/mdw/scripts/httpproxy restart

    Cheers - Bob

     
    Sophos UTM Community Moderator
    Sophos Certified Architect - UTM
    Sophos Certified Engineer - XG
    Gold Solution Partner since 2005
    MediaSoft, Inc. USA
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