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Ethernet and power surges (thunderstorms)

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For ease of cabling, we have a length of Cat5e cable that runs around 
the *outside* of part of the house. There's a wall box at each end, one 
of which is connected by a patch cable to the ADSL router, the other to 
an ethernet switch. The cable is just a length of Cat5e run through 
holes in the brickwork and stapled to the wall of the house by a 
helpful local builder.

In the recent storms that cable seems to have picked up a charge that 
damaged the ADSL router and possibly also the switch, but (fortunately) 
nothing else. 

The ethernet port on the router that was connected to the external 
cable is dead (the others are fine) and the ADSL connection is dead, 
though the router itself and the built-in WiFi are still working.

There was no lightning strike, but the storm was directly overhead and 
very active. I can well imagine that it might have induced a sufficient 
current in the external cable to damage the connected kit.

What can I do to reduce the likelihood of this happening again? Should 
I install metal sheathing around the external cable? I see that one can 
purchase ethernet surge protector devices, are these any good?

What does the team think?

-- 
Cheers,
 Daniel.
 

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Ethernet and power surges (thunderstorms) Daniel James <daniel@me.invalid> - 2016-09-25 12:02 +0100
  Re: Ethernet and power surges (thunderstorms) Adrian Caspersz <email@here.invalid> - 2016-09-26 12:12 +0100
    Re: Ethernet and power surges (thunderstorms) Daniel James <daniel@me.invalid> - 2016-09-26 13:15 +0100
      Re: Ethernet and power surges (thunderstorms) Adrian Caspersz <email@here.invalid> - 2016-09-26 18:07 +0100
  Re: Ethernet and power surges (thunderstorms) Stephen <stephen_hope@xyzworld.com> - 2016-09-26 20:51 +0100
    Re: Ethernet and power surges (thunderstorms) gargoyle60 <gargoyle60@example.invalid> - 2016-09-27 10:45 +0100
    Re: Ethernet and power surges (thunderstorms) Daniel James <daniel@me.invalid> - 2016-09-27 13:45 +0100
  Re: Ethernet and power surges (thunderstorms) andrew@cucumber.demon.co.uk (Andrew Gabriel) - 2016-11-21 18:30 +0000
    Re: Ethernet and power surges (thunderstorms) Daniel James <daniel@me.invalid> - 2016-11-21 23:55 +0000

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