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Another slow down with web-filter

Hi There,

SG210 box
Firmware: 9.506-2

web filter log:

2018:02:06-15:26:02 asg-1 httpproxy[21623]: Integrated HTTP-Proxy (c) 2007-2016 Sophos Ltd, Release 457.gb8589ed.rb3
2018:02:06-15:31:10 asg-1 httpproxy[21623]: id="0003" severity="info" sys="SecureWeb" sub="http" request="(nil)" function="http_parser_context_execute" file="http_parser_context.c" line="97" message="Unable to parse a http message of 7 bytes (HPE_INVALID_CONSTANT: invalid constant string)"
2018:02:06-15:31:10 asg-1 httpproxy[21623]: id="0003" severity="info" sys="SecureWeb" sub="http" request="0xdc6bb600" function="tunnel_response_read_chunk" file="tunnel.c" line="246" message="epoll_fill_buffer: Connection reset by peer"
2018:02:06-15:31:56 asg-1 httpproxy[21623]: id="0003" severity="info" sys="SecureWeb" sub="http" request="(nil)" function="http_parser_context_execute" file="http_parser_context.c" line="97" message="Unable to parse a http message of 7 bytes (HPE_INVALID_CONSTANT: invalid constant string)"
2018:02:06-15:31:57 asg-1 httpproxy[21623]: id="0003" severity="info" sys="SecureWeb" sub="http" request="0xdc247600" function="read_response_body_file" file="response.c" line="1503" message="Server delivered only 44 of 43 bytes"
2018:02:06-15:33:07 asg-1 httpproxy[21623]: id="0003" severity="info" sys="SecureWeb" sub="http" request="(nil)" function="http_parser_context_execute" file="http_parser_context.c" line="97" message="Unable to parse a http message of 7 bytes (HPE_INVALID_CONSTANT: invalid constant string)"
2018:02:06-15:33:09 asg-1 httpproxy[21623]: id="0003" severity="info" sys="SecureWeb" sub="http" request="(nil)" function="read_request_headers" file="request.c" line="1588" message="Read error on the http handler 112 (Input/output error)"
2018:02:06-15:33:41 asg-1 httpproxy[21623]: id="0003" severity="info" sys="SecureWeb" sub="http" request="(nil)" function="read_request_headers" file="request.c" line="1588" message="Read error on the http handler 183 (Input/output error)"
2018:02:06-15:33:42 asg-1 httpproxy[21623]: id="0003" severity="info" sys="SecureWeb" sub="http" request="(nil)" function="read_request_headers" file="request.c" line="1588" message="Read error on the http handler 160 (Input/output error)"
2018:02:06-15:34:19 asg-1 httpproxy[21623]: id="0003" severity="info" sys="SecureWeb" sub="http" request="(nil)" function="read_request_headers" file="request.c" line="1588" message="Read error on the http handler 159 (Input/output error)"
 
 
Web-Surfing is very slow. Some sites do not respond at all. CPU usage on the UTM is minimal.
If i Bypass the UTM Proxy everything goes smooth and fast.
My Web-Filter Config: Standard-Mode, no Cache, no black/whitelists, no category filters, AV scanning HTTP and HTTPS
 
did the latest update break something? or any idea where i can start to troubleshoot?
Thanks a lot.
Greetings


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