It tells me with Debug=1 in primenet.ini:
Attempting a redirect.
host = TERRARIUM, port = 4080
IP-addr = 10.4.6.33
GET
http://mersenne.org:80/cgi-bin/pnHttp.exe?ps&32516&.&. HTTP/1.0
Return code is not 200
ERROR: Primenet error 1
host = mersenne.org, port = 80
IP-addr = 64.66.6.250
GET
http://mersenne.org:80/cgi-bin/pnHttp.exe?ps&32516&.&. HTTP/1.0
RECV: HTTP/1.0 302 Redirect
Pragma: no-cache
Cache-Control: no-cache
Content-Length: 0
Connection: close
Location:
http://TERRARIUM:4080/nohost
Attempting a redirect.
host = TERRARIUM, port = 4080
IP-addr = 10.4.6.33
GET
http://mersenne.org:80/cgi-bin/pnHttp.exe?ps&32516&.&. HTTP/1.0
Return code is not 200
ERROR: Primenet error 1
host = mersenne.org, port = 80
IP-addr = 64.66.6.250
GET
http://mersenne.org:80/cgi-bin/pnHttp.exe?ps&32516&.&. HTTP/1.0
RECV: HTTP/1.0 302 Redirect
Pragma: no-cache
Cache-Control: no-cache
Content-Length: 0
Connection: close
Location:
http://TERRARIUM:4080/nohost
Attempting a redirect.
host = TERRARIUM, port = 4080
IP-addr = 10.4.6.33
GET
http://mersenne.org:80/cgi-bin/pnHttp.exe?ps&32516&.&. HTTP/1.0
Return code is not 200
ERROR: Primenet error 1
host = mersenne.org, port = 80
IP-addr = 64.66.6.250
GET
http://mersenne.org:80/cgi-bin/pnHttp.exe?ps&32516&.&. HTTP/1.0
RECV: HTTP/1.0 302 Redirect
Pragma: no-cache
Cache-Control: no-cache
Content-Length: 0
Connection: close
Location:
http://TERRARIUM:4080/nohost