I am trying to help someone who is running squid-3.5.20-12 on a
standalone server with the dansguardian content filter and suddenly
recently has been getting a lot of messages like:
2019/10/31 13:48:14 kid1| WARNING: Forwarding loop detected for:
HEAD / HTTP/1.0
Via: 1.0 HSFilterHyperos7.haftr.local (squid/3.5.20)
Cache-Control: max-age=259200
Connection: keep-alive
X-Forwarded-For: 10.10.1.2
Host: 10.10.1.2:8080
The access log looks something like:
1572545946.383 120000 10.10.1.2 TCP_MISS_ABORTED/000 0 HEAD
http://10.10.1.2:8080/ - HIER_DIRECT/10.10.1.2 -
1572545946.477 120000 10.10.1.2 TCP_MISS_ABORTED/000 0 HEAD
http://10.10.1.2:8080/ - HIER_DIRECT/10.10.1.2 -
1572545946.493 120000 10.10.1.2 TCP_MISS_ABORTED/000 0 HEAD
http://10.10.1.2:8080/ - HIER_DIRECT/10.10.1.2 -
(but these are for different transactions - they are all the same apart
from the timestamps)
The content filter listens on port 8080 and squid on 3128. The machine
is on 10.10.1.2
All the other posts I've seen seem to be for transparent mode or where
there is a User Agent string. I have found nothing to cover this
scenario. How can I troubleshoot to fix it and what information do you
need from me to help diagnose?
The only thing I have thought of is to put in a firewall rule blocking
traffic from 10.10.1.2 to 10.10.1.2:8080 but I fear shooting myself in
the foot.
Any help would be greatly appreciated.
Nick
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