Can you please provide a source? Here are some suggesting that he is influential:

https://www.theguardian.com/world/2014/mar/23/ukraine-crimea... :

Dugin serves as an adviser to State Duma speaker Sergei Naryshkin, a key member of the ruling United Russia party who has loudly supported Russian intervention in Ukraine, and has made widely viewed television appearances to discuss the Ukraine crisis alongside high-ranking members of the government. [Economist Sergei Glazyev] is also an associate of Dugin's.

https://www.hoover.org/research/russias-new-and-frightening-... :

Few books published in Russia during the post-communist period have exerted such an influence on Russian military, police, and foreign policy elites as Aleksandr Dugin’s 1997 neo-fascist treatise Osnovy geopolitiki: Geopoliticheskoe budushchee Rossii (Foundations of Geopolitics: The Geo-political Future of Russia).

https://foreignpolicy.com/2016/07/27/geopolitics-russia-mack... :

The Foundations of Geopolitics sold out in four editions, and continues to be assigned as a textbook at the General Staff Academy and other military universities in Russia. “There has probably not been another book published in Russia during the post-communist period which has exerted a comparable influence on Russian military, police, and statist foreign policy elites,” writes historian John Dunlop, a Hoover Institution specialist on the Russian right.

https://azure.org.il/include/print.php?id=483 :

The publication of The Foundations of Geopolitics in 1997 was received with great interest, and brought Dugin to the attention of powerful figures in the Russian government. He wisely befriended the oligarch Aleksandr Taranzev, who recommended him to the military general staff.

...

Dugin’s book was incorporated into the curriculum of the Russian military academy and became required reading for the next generation of officers. One year later, Dugin was appointed senior political adviser to Gennadiy Seleznyov, a former member of the Communist Party and chairman of the Russian parliament, who headed the Center for Geopolitical Analysis, a think tank dedicated to policy recommendations on internal security matters.

...

The radical intellectual’s stature reached new heights with the appointment of Vladimir Putin to the Russian presidency. Slowly but surely, Dugin succeeded in ingratiating himself with the new president’s inner circle. He forged strong ties with a hawkish, security-oriented clique of insiders, mostly composed of ex-members of the military and the security services. First and foremost among them was Igor Sechin, a former KGB official who has served as Putin’s closest adviser for the past fifteen years and is now deputy prime minister. Other members of this powerful faction include Security Council secretary and former head of the FSB Nikolai Patrushev; former deputy prime minister and Security Council member Sergei Ivanov; and Boris Gryzlov, the speaker of the lower house of parliament and chairman of Putin’s ruling United Russia party.

https://books.google.ca/books?id=0qQixjX1hwoC&q=Gennady+Sele... :

The activities of the copious and studious Eurasianist intellectual Alexander Dugin are making progress, and it is known that he has close relations with the Academy of the General Staff and once headed an advisory group in the office of Duma Speaker Gennady Seleznyov.