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Beginner

Bad Mask Info from ISP.

My ISP gave me 69.59.117.184-187 as available hosts. Subnet is /29, 255.255.255.248. Gateway is 69.59.117.183.

I confirmed this, even calling their operations center.

 

.184 with 255.255.255.248 produces a bad mask when I add to the Ethernet Interface. Instead I did .185 which worked. But traffic still does not flow. Gateway:  route outside 0.0.0.0 0.0.0.0 69.59.117.183 1

 

I tried .184 as the gateway for grins. Nothing. Is there away to trace packets to see what is going on?

I have an ASA 5505.

4 REPLIES 4
VIP Advisor

Re: Bad Mask Info from ISP.

Hi

This isn't possible.
The /29 would be:
69.59.117.185 - 69.59.117.190

Which means 183 isn't in the range of usable IPs in this subnet.

Thanks
Francesco
PS: Please don't forget to rate and select as validated answer if this answered your question
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VIP Advisor

Re: Bad Mask Info from ISP.

Hello


@Purtech22 wrote:

My ISP gave me 69.59.117.184-187 as available hosts. Subnet is /29, 255.255.255.248. Gateway is 69.59.117.183.

I confirmed this, even calling their operations center.


If it is a /29 then @Francesco Molino is correct 69.59.117.183 isn't in the same network and the operations center is wrong - however /28 would be within range

 



kind regards
Paul

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It will hopefully assist others with similar issues in the future
VIP Mentor

Re: Bad Mask Info from ISP.

 

 

on a side note, what do you mean with 'traffic is not flowing' ? Can you ping, or not, the default gateway ?

 

In order to be sure that the ASA configuration is correct, you can run Packet Tracer (replace x.x.x.x with an inside IP address):

 

ASA#packet-tracer input inside icmp x.x.x.x 8 0 8.8.8.8

Beginner

Re: Bad Mask Info from ISP.

Correct I cannot ping the gateway. I guess I am a bit shocked. I spent nearly 45 minutes on the phone. They seemed to be not sure about the settings, but that is what they gave me. I even doubled checked. Their local plant operations manager did the same. I don't get why it is so hard. I will try the Packet Tracer next.

 

P.S. I tried the /28 with difference IPs I thought might work. Nothing has.

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