Environment
Situation
Resolution
Additional Information
Steps To Duplicate
1. Set up a GroupWise System including MTA, POA and GWIA with
GroupWise 7.0.1 Agent or latest GroupWise Hot Patch on a Linux
Server
2. Please make sure that the Linux System can connect to the
Internet
3. Launch ConsoleOne and connect to the GroupWise Domain
4. Highlight the Domain Object hold GroupWise Internet Agent on the
left hand side
5. Use the drop-down list to display Gateways
6. Right Click on the GWIA object and select Properties
7. Click Access Control | Blacklists
8. Add xbl.spamhaus.org and sbl.spamhaus.org
9. Click Apply and Close
10. Please make sure that GWIA automatically restarts itself after
the above changes are made
11. Please login as user using GroupWise Client and try sending a
mail to the Internet to make sure GWIA can resolve domain names and
send emails outside
12. Now we need to try telnetting to GWIA on Port 25 using a
blacklisted IP Address. One of the black listed ip address is
80.99.103.108. Please follow the steps listed below to telnet GWIA
on Port 25 using a blacklisted IP Address
a. Launch YaST on Linux
b. Click Network Devices | Network Card |
c. Click Change on the Existing Network Card
d. Click Edit on the Network Card
e. Click Advanced | Virtual Aliases
f. Add IP Address 80.99.103.109 and save the changes
g. Restart GroupWise Internet Agent
h. GWIA will come up and bind itself to both the IP Addresses
i. Change the IP Address of a windows workstation connected to the
same switch as the Linux Server and give it the blacklisted ip
address 80.99.103.108. This Windows box should only have one ip
address and that is the Blacklisted IP Address
j. Telnet to GWIA on Port 25 from the above mentioned workstation
and it shows the greeting and it allows us to send email using
telnet (GWIA should have blocked the IP Address)
If the above procedure is followed with a NetWare server, the IP Address will be blocked as soon as we Telnet to the GroupWise Internet Agent.