[squid-users] Log resolved IP somehow?

Ralf Hildebrandt Ralf.Hildebrandt at charite.de
Tue Jun 18 13:37:46 UTC 2019


>From my log:
============

Mon Jun 17 07:28:47 2019     36 10.39.68.232 TCP_DENIED/302 390 CONNECT trx.adscale.de:443 - HIER_NONE/- text/html accessRule=ensiloip -

Now I tried find out why  trx.adscale.de is being denied. I'm using squid-5 with annotate_transaction:

acl markensiloip annotate_transaction accessRule=ensiloip
acl ensiloip dst "/etc/squid5/manual-ensilo-ipblocklist.acl"
http_access deny ensiloip markensiloip


So I *DO* know that /etc/squid5/manual-ensilo-ipblocklist.acl must be
the reason for the refusal -- so I resolved trx.adscale.de and got:

# host trx.adscale.de
trx.adscale.de is an alias for san.adscale.de.edgekey.net.
san.adscale.de.edgekey.net is an alias for e9040.g.akamaiedge.net.
e9040.g.akamaiedge.net has address 95.100.198.56


So a CDN is being used. And alas:


# fgrep -c 95.100.198.56 /etc/squid5/manual-ensilo-ipblocklist.acl
0
# fgrep -c 95.100.198 /etc/squid5/manual-ensilo-ipblocklist.acl
0
# fgrep -c 95.100 /etc/squid5/manual-ensilo-ipblocklist.acl
0

So, I guss the IP must have change between to time "trx.adscale.de" was
blocked and now. 

How can I log the IP "trx.adscale.de" resolved to when the rejection happened?

-- 
Ralf Hildebrandt                   Charite Universitätsmedizin Berlin
ralf.hildebrandt at charite.de        Campus Benjamin Franklin
https://www.charite.de             Hindenburgdamm 30, 12203 Berlin
Geschäftsbereich IT, Abt. Netzwerk fon: +49-30-450.570.155


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