After days of spotty online access, Bank of America (BofA) today said its Web and mobile services have not been hit by hacking or denial-of-service attacks. But the nation's largest bank would not disclose what's causing its website problems.

The bank also said it has substituted its standard homepage with an alternate one to help in user navigation.

"I just want to be really clear. Every indication [is that] recent performance issues have not been the result of hacking, malware or denial of service," said BofA spokeswoman Tara Burke. "We've had some intermittent or sporadic slowness. We don't break out the root cause."

A screenshot of Bank of America's homepage earlier this week

BofA's online banking website has at times been inaccessible from various locations around the U.S., and it continues to experience severe and intermittent performance issues, according to Internet and mobile cloud monitoring services.

According to Alexa Web monitoring services , Bank of America's website woes are number six in a list of hot Internet topics, right behind Apple's new iPhone 4S and Amanda Knox, the American student just released from an Italian prison after her murder conviction was overturned by an appeals court.

Web monitoring company Keynote Systems said it has been monitoring "serious issues" with BofA's connected and mobile website for the past few days. And, [yesterday] we saw that the site was completely down, a Keynote Systems spokesman said. The problems continue today.

Speculation ran high that hackers might be causing service disruptions after problems with BofA's website began last Friday and continued over the weekend into this week.

In interviews earlier this week, Burke said BofA had simply taken some "proactive measures to manage customer traffic during peak hours during the day," and that had resulted in slowness.

BofA's new homepage today

Today, she was less forthcoming about what was causing the problems.

"We began seeing some sporadic issues on Friday. We're not going to get into the technical details. We're not going to comment on the technicalities of what we do," she said. "Given the last few days, what you're seeing today is we're rigorously monitoring the online banking space, and we chose to deploy an alternate homepage. The reason for this is to ensure customers get to their right destination quickly.

"We continue to assess the situation," she added.

Lucas Mearian covers storage, disaster recovery and business continuity, financial services infrastructure and health care IT for Computerworld. Follow Lucas on Twitter at @lucasmearian or subscribe to Lucas's RSS feed . His e-mail address is [email protected] .

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