Network problems with new kernel in Debian.
Last updated kernel to 3.2.0-4-686-pae on my Debian firewall via apt-get. Previous kernel package was linux-image-3.2.0-4-686-pae_3.2.57-3+deb7u2_i386 and the last is linux-image-3.2.0-4-686-pae_3.2.60-1+deb7u1_i386.
After that, most of the sites was opened after long delays or not open at all.
No errors on the console. I do not know where to look for the problem.