Browser problems

[Roy van der Westhuizen]

I posted this to the OS X list but did not receive a reply. Maybe some 
can help me here. Subsequent to posting I was informed by my ISP to 
flush the cache via Terminal which I did <lookupd -flushcache> This 
then allowed me to ping sites, but when I open a browser, I am still 
denied access. My ISP technical director says apparently a lot of of 
Mac people have a been experiencing this problem. However even if this 
works on 0SX, how do I get it to work on OS 9 where I am experiencing 
the same problem?

Original message:

Since last week Tuesday, both my wife, running an iMac 15" 800 using OS
9.2.2 and Explorer 5.1 and I, using a PB 17" 1 GHZ 10.2.8 and with 
Mozilla .7,
Safari and Explorer 5.2, have not managed to get onto the internet
beyond our ISP's hosted sites. They insist I must reinstall the
browsers, but I find it strange that we can both not get in using 4
browsers on two OS's. I know they were setting up firewalls to help
protect against the MyDoom.A and .B viruses. Could these be mac-phobic?
Could either of these viri have affected us? We connect through a
router via ISDN.
I tried reinstalling Mozilla but had no luck, but of course cannot get
onto the net to download new installers. Any advise or tips would be
greatly appreciated.

Regards,

Roy