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Kind of a delay before opening webpages

apijnappels
This weekend my ISP upgraded my connection to 150Mbps down / 15Mbps up.
That of course is great, but unfortunately I had to use another modem for this which they also sent me.
The modem is a Cisco EPC3928AD. It looks like it's not possible to configure this device as a bridge so I may be stucked with my UTM behind this NAT device.
I have already given my UTM a static IP in the range of the modem and setup the modem to use this address as a DMZ but some strange things are happening:

One of these problems is that when opening webpages it takes several seconds (4-20) before anything starts to happen and then all of a sudden the pages load very quickly.
I don't see anything suspicious in firewall, IPS or webfiltering logs which would explain this.

I'm using UTM 9.2 beta 9.185-3 but these problems weren't there before my ISP upgraded my connection so I don't yet suspect the beta firmware to be the culprit.


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  • 0 in reply to Michael Dunn
    As per apijnappels' other thread, his http.log includes this tidbit:

    2013:12:11-09:49:51 utm httpproxy[16089]: id="0003" severity="info" sys="SecureWeb" sub="http" request="0xca4e688" function="connect_server_timeout" file="dns.c" line="754" message="Connection to KNMI - Koninklijk Nederlands Meteorologisch Instituut using IPv6 timed out, re-trying to connect using IPv4"


    The timeout is 60 seconds.  So either his UTM or his modem is not liking IPv6.


    I guess it was my modem, since now it's in bridged mode and all delays are gone.

    Managing several Sophos UTMs and Sophos XGs both at work and at some home locations, dedicated to continuously improve IT-security and feeling well helping others with their IT-security challenges.

    Sometimes I post some useful tips on my blog, see blog.pijnappels.eu/category/sophos/ for Sophos related posts.

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