ICMP 435 Destination unreachable (Communication administratively filtered)

[Dennis Schneck]

Hi Sven,

no firewall active:

# iptables --list
Chain INPUT (policy ACCEPT)
target     prot opt source               destination

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination


On 11.08.21 12:14, Sven Hartge wrote:
> On 11.08.21 11:50, Dennis Schneck wrote:
>
>> if the Switch sends requests can see only in wireshark this: ICMP 435 
>> Destination unreachable (Communication administratively filtered)
>>
>>    110 12.985550915 172.16.1.28 → 192.168.1.78   ICMP 435 Destination 
>> unreachable (Communication administratively filtered)
>
> This ICMP code is only generated when something like iptables or 
> nftables is rejecting the packet.
>
> So check for any local firewalls active on your server and open the 
> needed ports.
>
> Grüße,
> Sven.
>
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-- 
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Mit freundlichen Grüßen / Best Regards / 诚挚的问候
Dennis Schneck


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