  The S-fold description of Janus-type solutions of type IIB supergravity is
investigated. This is done by first studying a $\,\textrm{U}(1) \times
\textrm{U}(1)\,$ invariant sector of the four-dimensional dyonically-gauged
$\,{[\,\textrm{SO}(1,1) \times \textrm{SO}(6)\,] \ltimes \mathbb{R}^{12}}\,$
maximal supergravity that arises upon reduction of type IIB supergravity on
$\,\mathbb{R} \, \times \, \textrm{S}^{5}\,$. Two AdS$_{4}$ solutions
preserving $\,\textrm{SU}(3)\,$ and $\,\textrm{SO}(6)\,$ gauge symmetry
together with $\,\mathcal{N}=1\,$ and $\,\mathcal{N}=0\,$ supersymmetry are
found within this sector. Fetching techniques from the E$_{7(7)}$ exceptional
field theory, these solutions are uplifted to ten-dimensional S-folds of type
IIB Janus-type solutions of the form $\,\textrm{AdS}_{4} \times \mathbb{R}
\times \textrm{M}_{5}\,$. The solutions presented here are natural candidates
for the holographic duals of three-dimensional $\,\mathcal{N}=1\,$ and
$\,\mathcal{N}=0\,$ interface super-Yang--Mills theories with
$\,\textrm{SU}(3)\,$ and $\,\textrm{SU}(4)\,$ internal symmetry.
