Hello,
I need to definitively solve the ipv6 (un)reachbility issue.
I state I read this topic:
http://squid-web-proxy-cache.1019090.n4.nabble.com/dns-v4-first-on-ignored-td4658427.html
but not found a solution. Amos wrote “Squid tests for IPv6 ability
automatically by opening a socket on a private IP address, if that works the
socket options are noted and used.”
Anyway I disable IPv6 on my Red Hat 7.4 with the following:
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
net.ipv6.conf.bond0.disable_ipv6 = 1
net.ipv6.conf.lo.disable_ipv6 = 1
Used the “dns_v4_first on” and also “tcp_outgoing_address 172.31.1.x all” on
squid conf to force the use of IPv4.
Anyway squid try to connect to the IPv6 address instead of IPv4 and I’m not
able to reach it:
C:\Users\atroiano>nslookup download.pdfforge.org
Server: espevmdxxxx.xxxx.prv
Address: 172.x.x.x
Risposta da un server non autorevole:
Nome: download.pdfforge.org
Addresses: 2001:4860:4802:38::15
2001:4860:4802:34::15
2001:4860:4802:32::15
2001:4860:4802:36::15
216.239.32.21
216.239.38.21
216.239.36.21
216.239.34.21
[root@HUB-RM-PRX-03 ~]# tail -f /var/log/squid/rsa/access.log | grep
pdfforge.org
%SQUID-4: 172.31.x.x 49444 [25/Jan/2019:11:02:58 +0100] "GET
http://download.pdfforge.org/download/pdfcreator/PDFCreator-stable HTTP/1.1"
download.pdfforge.org - - "/download/pdfcreator/PDFCreator-stable" 503
text/html 4545 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:64.0)
Gecko/20100101 Firefox/64.0" TCP_MISS:HIER_DIRECT 2001:4860:4802:38::15 80 0
Squid doesn’t try to connect to IPv4 addresses for this site and for many
others.
What can I do?
My ISP is IPv4 only.
Thank you, Regards.
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