on your tnsnames.ora file:

ALIAS =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(Host = 10.10.10.10)(Port = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME=HOSTNAME.DOMAINNAME.COM)
)
)

Try to specify Host with IP address and spell out the SERVICE_NAME= full hostname and domain name instead of
SID=SIDNAME...

Also, on your listener.ora file,

set your GLOBAL_DBNAME to full hostname and domain name as it appears in SERVICE_NAME in tnsname.ora

not sure if it's gonna work or not, but you can give it a try...