Open all ports iptables?

Gmeister4 · Sep 2, 2018

Can I open all ports iptables? or checking which ports are opening or closing? I am using a firewall (csf) but I don't find any options to open all ports iptables.

RelateHost · Sep 2, 2018

Gmeister4 said:
Can I open all ports iptables? or checking which ports are opening or closing? I am using a firewall (csf) but I don't find any options to open all ports iptables.

Why you want to open ALL the ports? If you are using CFS, you can enable inbound and outbound ports in the firewall settings.

dfmcvn · Sep 8, 2018

sudo iptables -X
sudo iptables -F

mobin · Sep 10, 2018

If you want to open all ports, why you have CSF? Disable CSF and thats it.... But this is not recommended in any cases...open only necessary ports after complete your testing..

bountysite · Oct 9, 2018

If you are unsure if firewall is causing issues, use tcpdump to troubleshoot.
For eg, to check outbound emails
tcpdump -i any -nn src host My.ip.add.ress and dst port 25

Check if the connection is established or continuously sending SYN requests.

Also you can hping3 to trace, if it is getting blocked on server side.
hping3 -T -S -p 25 des.ti.na.tion
Ctrl Z to increase hop. It works like traceroute. If firewall is blocking, you will not get a TTL timeout reply.

Open all ports iptables?

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