You don't say if you are trying to install an RPM from a USB stick or if you are trying to compile from source. RPMs are preferred. You can find a prebuilt RPM for ettercap in EPEL and wireshark is part of CentOS itself so can be found on the DVD/CD though there is also an updated version available in the CentOS updates repo.
- Code: Select all
ettercap.x86_64 0.7.3-19.el5 epel
ettercap-common.x86_64 0.7.3-19.el5 epel
ettercap-debuginfo.x86_64 0.7.3-19.el5 epel-debuginfo
ettercap-gtk.x86_64 0.7.3-19.el5 epel
If security is of major concern then I guess you can also obtain the source RPM for ettercap from EPEL and build it yourself and thus have some control over it cleanliness!