I am looking to learn an firewall and security is it useful to my career as network engineer, suggest me if certifications are available?

you can trained up in ITIL courses from New Horizon or anyother institution.

yes if you go for security itself a certificate .But corporate company need certification so better learn while hunting you certified on perticular firewall .

yes brother u can do it but i suggest you to go for CCNA R&S if you are new in networking  then CCNA security track...Iand further CCNP security You will learn these things there...and one famouse certification and big name CISSP great thing...

SO if you want to learn specifically Firewall and Security then go for CBT nuggets...CCNP security series..truely for these technologies..hope it will be help u alot.

For one thing, he earned a Religion degree at Swarthmore College in Pennsylvania whereas conventional wisdom might have led him to pursue something more along the lines of a Computer Science degree. But while his post-secondary focus might seem like an odd choice for someone interested in information security, MacLeod’s love for technology and how things work balances things out just fine.