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Web filter log only shows Input/Output Errors

I'm running UTM9.502-4. I've been trying to fine tune some web filtering exceptions after enabling Scan and Decrypt in Transparent mode. This caused a lot of iOS apps not work, which I've gathered is a normal occurrence because of cert pinning in the apps.

I've been looking at the log to figure out what to add an exception for, but all I'm seeing are Input/Output errors like this:

2017:08:28-16:28:29 firewall httpproxy[5721]: id="0003" severity="info" sys="SecureWeb" sub="http" request="(nil)" function="read_request_headers" file="request.c" line="1586" message="Read error on the http handler 2407 (Input/output error)"

2017:08:28-16:28:30 firewall httpproxy[5721]: id="0003" severity="info" sys="SecureWeb" sub="http" request="(nil)" function="read_request_headers" file="request.c" line="1586" message="Read error on the http handler 2407 (Input/output error)"

2017:08:28-16:28:30 firewall httpproxy[5721]: id="0003" severity="info" sys="SecureWeb" sub="http" request="(nil)" function="read_request_headers" file="request.c" line="1586" message="Read error on the http handler 2407 (Input/output error)"

2017:08:28-16:28:35 firewall httpproxy[5721]: id="0003" severity="info" sys="SecureWeb" sub="http" request="(nil)" function="read_request_headers" file="request.c" line="1586" message="Read error on the http handler 2407 (Input/output error)"

2017:08:28-16:28:35 firewall httpproxy[5721]: id="0003" severity="info" sys="SecureWeb" sub="http" request="(nil)" function="read_request_headers" file="request.c" line="1586" message="Read error on the http handler 2407 (Input/output error)"

2017:08:28-16:28:36 firewall httpproxy[5721]: id="0003" severity="info" sys="SecureWeb" sub="http" request="(nil)" function="read_request_headers" file="request.c" line="1586" message="Read error on the http handler 2407 (Input/output error)"

2017:08:28-16:28:36 firewall httpproxy[5721]: id="0003" severity="info" sys="SecureWeb" sub="http" request="(nil)" function="read_request_headers" file="request.c" line="1586" message="Read error on the http handler 2458 (Input/output error)"

2017:08:28-16:28:36 firewall httpproxy[5721]: id="0003" severity="info" sys="SecureWeb" sub="http" request="(nil)" function="read_request_headers" file="request.c" line="1586" message="Read error on the http handler 2458 (Input/output error)"

2017:08:28-16:28:36 firewall httpproxy[5721]: id="0003" severity="info" sys="SecureWeb" sub="http" request="(nil)" function="read_request_headers" file="request.c" line="1586" message="Read error on the http handler 2458 (Input/output error)"

2017:08:28-16:28:36 firewall httpproxy[5721]: id="0003" severity="info" sys="SecureWeb" sub="http" request="(nil)" function="read_request_headers" file="request.c" line="1586" message="Read error on the http handler 2458 (Input/output error)"

2017:08:28-16:28:36 firewall httpproxy[5721]: id="0003" severity="info" sys="SecureWeb" sub="http" request="(nil)" function="read_request_headers" file="request.c" line="1586" message="Read error on the http handler 2407 (Input/output error)"

2017:08:28-16:28:36 firewall httpproxy[5721]: id="0003" severity="info" sys="SecureWeb" sub="http" request="(nil)" function="read_request_headers" file="request.c" line="1586" message="Read error on the http handler 2407 (Input/output error)"

2017:08:28-16:28:36 firewall httpproxy[5721]: id="0003" severity="info" sys="SecureWeb" sub="http" request="(nil)" function="read_request_headers" file="request.c" line="1586" message="Read error on the http handler 2407 (Input/output error)"

2017:08:28-16:28:41 firewall httpproxy[5721]: id="0003" severity="info" sys="SecureWeb" sub="http" request="(nil)" function="read_request_headers" file="request.c" line="1586" message="Read error on the http handler 2452 (Input/output error)"

2017:08:28-16:28:42 firewall httpproxy[5721]: id="0003" severity="info" sys="SecureWeb" sub="http" request="(nil)" function="read_request_headers" file="request.c" line="1586" message="Read error on the http handler 2452 (Input/output error)"

2017:08:28-16:28:42 firewall httpproxy[5721]: id="0003" severity="info" sys="SecureWeb" sub="http" request="(nil)" function="read_request_headers" file="request.c" line="1586" message="Read error on the http handler 2452 (Input/output error)"

2017:08:28-16:28:42 firewall httpproxy[5721]: id="0003" severity="info" sys="SecureWeb" sub="http" request="(nil)" function="read_request_headers" file="request.c" line="1586" message="Read error on the http handler 2452 (Input/output error)"

2017:08:28-16:28:42 firewall httpproxy[5721]: id="0003" severity="info" sys="SecureWeb" sub="http" request="(nil)" function="read_request_headers" file="request.c" line="1586" message="Read error on the http handler 2407 (Input/output error)"

2017:08:28-16:28:42 firewall httpproxy[5721]: id="0003" severity="info" sys="SecureWeb" sub="http" request="(nil)" function="read_request_headers" file="request.c" line="1586" message="Read error on the http handler 2407 (Input/output error)"

2017:08:28-16:28:42 firewall httpproxy[5721]: id="0003" severity="info" sys="SecureWeb" sub="http" request="(nil)" function="read_request_headers" file="request.c" line="1586" message="Read error on the http handler 2407 (Input/output error)"

2017:08:28-16:28:42 firewall httpproxy[5721]: id="0003" severity="info" sys="SecureWeb" sub="http" request="(nil)" function="read_request_headers" file="request.c" line="1586" message="Read error on the http handler 2458 (Input/output error)"

2017:08:28-16:28:47 firewall httpproxy[5721]: id="0003" severity="info" sys="SecureWeb" sub="http" request="(nil)" function="read_request_headers" file="request.c" line="1586" message="Read error on the http handler 2407 (Input/output error)"

2017:08:28-16:28:47 firewall httpproxy[5721]: id="0003" severity="info" sys="SecureWeb" sub="http" request="(nil)" function="read_request_headers" file="request.c" line="1586" message="Read error on the http handler 2407 (Input/output error)"

I had to hook my iPhone up to a Burp proxy to discover that an exception for inbox.google.com was required for the gmail app to work.

This is making it near impossible to figure out the exceptions I need to add. Is this a bug?



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