Re: Am I being attacked?

Tech-Archive recommends: Fix windows errors by optimizing your registry


"Lanwench [MVP - Exchange]"
<lanwench@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:eHotDVtFGHA.984@xxxxxxxxxxxxxxxxxxxxxxx
>
> "BoboTWG" <bobotwg@xxxxxxxxxxxxxxxxxxx> wrote in message
> news:pwaxf.49805$BZ5.46334@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx
>> Hello. Had mucho problems last week when SBC went to upgrade our speed
>> package on our DSL line. We were down for a couple of days due to them
>> deciding to change our static IP addresses without our knowledge. It also
>> turned out that we were dopping tons of packets but that was supposedly
>> fixed when we did not route the DSL line through our UPS/Surge protector.
>> I am noticing that I am still getting some "spoof attack" warnings in my
>> event viewer. Is there any way to tell if this is caused by more hardware
>> issues or if I am really getting attacked? Thanks in advance.
>>
>> Aaron
>>
>
> You aren't using public IPs on your internal network for some reason, are
> you? Nothing on your LAN should have changed just because your public IP
> address changed.
>
> Do you run SBS Standard, or Premium w/ISA? If the former ,what kind of
> firewall are you connecting to (between your DSL modem and your
> LAN-connected computers)?
>

Hi Lanwench. Thanks for the reply. Going to copy and paste your questions
with my answers below to save me confusion.

-You aren't using public IPs on your internal network for some reason, are
you?

Nope. My internal IP addresses are all 192.168.16.*

-Nothing on your LAN should have changed just because your public IP
address changed.

Internal I was still up and running but could not hit the outside world and
Exchange was down.

I am running SBS Premium w/ISA etc. Just using the built in firewall for
now. The customer does not want to spring for more until they feel it is
really needed.

Thanks again. I look forward to your reply.

Aaron


.

Relevant Pages

  • Re: Virus, trojan, spyware...what have I got?
    ... > PS I'm on an internal network, DSL, with the server running Norton Security ... AdAware can miss some stuff. ... I check all incoming email via viewing message source ...
    (alt.computer.security)
  • Re: Public Addresses Used Internally
    ... quality of the firewall. ... With public IPs access must only route into internal network ... There is increased cost with holding the public IPs, ...
    (microsoft.public.security)
  • Re: Internet access load balancing with DSL (broadband) lines
    ... MCSE:Security Windows 2000 ... > apply for additional DSL from other providers for load balancing and high ... I want to share 2 DSL lines on our internal network. ...
    (microsoft.public.win2000.ras_routing)
  • iptables firewall between dsl router and intranet
    ... I had setup a iptables based linux firewall. ... A lightning strike blows my modem and the new dsl hardware is ... my iptables firewall between this router and my internal network. ... Is it a good idea to set the unsecure nic eth1 of the firewall and the dsl ...
    (comp.os.linux.networking)
  • Redhat 9 and IP Masquerading
    ... I'm trying to setup a Redhat 9 machine to do IP Masquerading on our ... DSL on either card and get out to the world just fine. ... on the internal network I can not see nor ping any host. ...
    (RedHat)