Apparently it was impossible to halt the attack, which left the sites periodically inaccessible. Screens gave internet users error messages instead.
To be fair to the Germans, they get 3,000 such hacker assaults daily and this was the first one to get through. The sites were not critical either. They include general information, speeches and podcasts from the chancellor and general government information, are used by journalists and the public.
The head of the BfV domestic intelligence agency said recently about five of the daily attacks came from “foreign” intelligence agencies.
The hacking took place before a meeting in Berlin between Ukraine's Prime Minister Arseny Yatseniuk and German President Joachim Gauck.
Germany has been a firm supporter of Kiev throughout its confrontation with Russia, which Kiev accuses of aiding armed separatists in eastern Ukraine.
In a statement on its website, a group calling itself CyberBerkut claimed responsibility.
"Berkut" is a reference to the thugs used by the government of Ukraine's former President Viktor Yanukovich to crush those who did not think it was a good idea to do what Tsar Putin told them anymore .
"CyberBerkut has blocked German Chancellor and the Bundestag's websites," it said on www.cyber-berkut.org.
"We appeal to all people and the government of Germany to stop financial and political support of criminal regime in Kiev, which unleashed a bloody civil war, it said.