> Hello,
>
> On Mon, May 15, 2023 at 09:10:24AM +0800, Tom Reed wrote:
>> If I clean iptables in the destination host, this telnet will get
>> success
>> at once.
>>
>> Any hints?
>
> Why have you not used "iptables -vL" to show the packet counts of
> each rule so you can see which rules the packets match? They are
> clearly matching some other earlier rule, and I suggested that in
> the email you have replied to for the exact purpose of checking that
> out.
>
Yes after each telnet from client host, the count was increased.
0 0 REJECT tcp -- any any anywhere
anywhere tcp dpt:imaps reject-with tcp-reset
0 0 REJECT tcp -- any any anywhere
anywhere tcp dpt:imap2 reject-with tcp-reset
99 4620 REJECT tcp -- any any anywhere
anywhere tcp dpt:submission reject-with tcp-reset
regards
--
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