Firewall - Custom

[DICS]

For example, there is one problem - I need to close access to the remote machine through telnet (port 24).

What do I have to enter to the Match fields?

 

[IPGuru]

I think we need more information on what you require
the main firewall tab has options to control telnet,ftp smtp, http andvarisous other common protocols

if you need anything mre you need toadd custom entries, to do this you need to know the protocol type (tcp, UDP etc) and the ports to block, without indepth knowledge of TCP/IP this can be very tricky.

 

[DICS]

The main tab intended for standart ports.

I want to try to make permit other nonstandart ports.

I want to permit telnet on TCP-port 24.

I fill the fields.

IP-protocol: 6
Match Offset: 22
Match Length: 2
Match Data: 18
Match Mask: FF

It doesn`t work.

I think error in Match Offset. I took this from help examples.

 

[IPGuru]

Your problem is Ports are 2 Bytes long, sof tor match data & mask you require 0018 &FFFF

Offset 22 is the outbound port, Offset 20 is the inbound port

 

[DICS]

Thanks. Yes, it was my great error.

 

[IPGuru]

I would not call it a great error. Custom firewall entries cause confusion, even to Avayas tech support team