[squid-users] SQUID refuses to listen on any TCP Port

[ben]

Hello,

I've finally pinpointed the cause. It is my IPV6 iptables rules at 
fault. Once I changed the INPUT policy from DROP to Accept, everything 
works as expected! what a waste of so many hours! Thank you all
>
> Hello,
> It could be that squid doesn't like some of my packages(I'm not sure 
> which one). I installed the following packages:
>   strongswan,nrpe, nagios-plugins
>
> I also tweaked some kernel settings
> net.ipv4.ip_forward = 1
> net.ipv4.ip_local_port_range = 10000 61000
> net.ipv4.tcp_max_syn_backlog = 8192
> net.ipv4.tcp_tw_reuse = 1
> net.ipv4.tcp_max_tw_buckets = 5000
> fs.file-max = 65536
> net.core.rmem_max = 67108864
> net.core.wmem_max = 67108864
> net.ipv4.tcp_rmem = 4096 87380 67108864
> net.ipv4.tcp_wmem = 4096 65536 67108864
> net.core.netdev_max_backlog = 250000
> net.ipv4.tcp_mtu_probing = 1
> net.core.default_qdisc = fq
> net.ipv4.tcp_congestion_control = bbr
>
> I couldn't win her heart back even if I rolled back all these settings 
> and removed the packages.
>
> I'm willing to pay if someone can help me resolve this issue
>
> Thank you!
>>
>> Hello,
>>
>> It looks like that if I start installing it right after OS 
>> installation, it works. But not if I install any packages, for 
>> example, make, gcc,strongswan and so on. once it stop working, it 
>> will not work anymore even if I remove all aforementioned packages. 
>> reboot also doesn't help. I also tried it on Debian 11. no luck 
>> either! it only works in old ubuntu 16
>> I can be 100% sure that squid is not listening on any TCP ports. 
>> running these commands looks fine
>>
>> Thanks for your being patient and kind
>>
>> root at host8d66c97880:~# netcat -v -l -4 34568
>> Listening on 0.0.0.0 34568
>> ^C
>> root at host8d66c97880:~# netcat -v -l -6 34568
>> Listening on :: 34568
>>
>> I configured it to listen on 34568
>>
>>
>>> netcat -v -l -6 4444
>>> netcat -v -l -4 4444
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